OpenVPN Change Log

 Copyright (C) 2002-2009 OpenVPN Technologies, Inc. <sales@openvpn.net>

 2009.07.16 -- Version 2.1_rc19
 
 * In Windows TAP driver, refactor DHCP/ARP packet injection code to
   use a DPC (deferred procedure call) to defer packet injection until
   IRQL < DISPATCH_LEVEL, rather than calling NdisMEthIndicateReceive
   in the context of AdapterTransmit.  This is an attempt to reduce kernel
   stack usage, and prevent EXCEPTION_DOUBLE_FAULT BSODs that have been
   observed on Vista.  Updated TAP driver version number to 9.6.
 
 * In configure.ac, use datadir instead of datarootdir for compatibility
   with <autoconf-2.60.
 

 2009.06.07 -- Version 2.1_rc18
 
 * Fixed compile error on ./configure --enable-small
 
 * Fixed issue introduced in r4475 (2.1-rc17) where cryptoapi.c change
   does not build on Windows on non-MINGW32.
 

 2009.05.30 -- Version 2.1_rc17
 
 * Reduce the debug level (--verb) at which received management interface
   commands are echoed from 7 to 3.  Passwords will be filtered.
 
 * Fixed race condition in management interface recv code on
   Windows, where sending a set of several commands to the
   management interface in quick succession might cause the
   latter commands in the set to be ignored.
 
 * Increased management interface input command buffer size
   from 256 to 1024 bytes.
 
 * Minor tweaks to Windows build system.
 
 * Added "redirect-private" option which allows private subnets
   to be pushed to the client in such a way that they don't accidently
   obscure critical local addresses such as the DHCP server address and
   DNS server addresses.
 
 * Added new 'autolocal' redirect-gateway flag.  When enabled, the OpenVPN
   client will examine the routing table and determine whether (a) the
   OpenVPN server is reachable via a locally connected interface, or (b)
   traffic to the server must be forwarded through the default router.
   Only add a special bypass route for the OpenVPN server if (b) is true.
   If (a) is true, behave as if the 'local' flag is specified, and do not
   add a bypass route.
 
   The new 'autolocal' flag depends on the non-portable test_local_addr()
   function in route.c, which is currently only implemented for Windows.
   The 'autolocal' flag will act as a no-op on platforms that have not
   yet defined a test_local_addr() function.
 
 * Increased TLS_CHANNEL_BUF_SIZE to 2048 from 1024 (this will allow for
   more option content to be pushed from server to client).
 
 * Raised D_MULTI_DROPPED debug level to 4 from 3 to filter out (at debug
   levels <=3) a common and usually innocuous warning.
 
 * Fixed issue of symbol conflicts interfering with Windows CryptoAPI
   functionality (Alon Bar-Lev).
 
 * Fixed bug where the remote_X environmental variables were not being
   set correctly when the 'local' option is specifed.

 2009.05.17 -- Version 2.1_rc16
 
 * Windows installer changes:
 
   1. ifdefed out the check Windows version code which is causing
   problems on Windows 7
 
   2. don't define SF_SELECTED if it is already defined
 
   3. Use LZMA instead of BZIP2 compression for better compression
 
   4. Upgraded OpenSSL to 0.9.8k
 
 * Added the ability to read the configuration file
   from stdin, when "stdin" is given as the config
   file name.
 
 * Allow "management-client" directive to be used
   with unix domain sockets.
 
 * Added errors-to-stderr option.  When enabled, fatal errors
   that result in the termination of the daemon will be written
   to stderr.
 
 * Added optional "nogw" (no gateway) flag to --server-bridge
   to inhibit the pushing of the route-gateway parameter to
   clients.
 
 * Added new management interface command "pid" to show the
   process ID of the current OpenVPN process (Angelo Laub).
 
 * Fixed issue where SIGUSR1 restarts would fail if private
   key was specified as an inline file.
 
 * Added daemon_start_time and daemon_pid environmental variables.
 
 * In management interface, added new ">CLIENT:ESTABLISHED" notification.
 
 * Build fixes:
 
   1. Fixed some issues with C++ style comments that leaked into the code.
 
   2. Updated configure.ac to work on MinGW64.
 
   3. Updated common.h types for _WIN64.
 
   4. Fixed issue involving an #ifdef in a macro reference that breaks early gcc
      compilers.
 
   5. In cryptoapi.c, renamed CryptAcquireCertificatePrivateKey to
      OpenVPNCryptAcquireCertificatePrivateKey to work around
      a symbol conflict in MinGW-5.1.4.
 

 2008.11.19 -- Version 2.1_rc15
 
 * Fixed issue introduced in 2.1_rc14 that may cause a
   segfault when a --plugin module is used.
 
 * Added server-side --opt-verify option: clients that connect
   with options that are incompatible with those of the server
   will be disconnected (without this option, incompatible
   clients would trigger a warning message in the server log
   but would not be disconnected).
 
 * Added --tcp-nodelay option: Macro that sets TCP_NODELAY socket
   flag on the server as well as pushes it to connecting clients.
 
 * Minor options check fix: --no-name-remapping is a
   server-only option and should therefore generate an
   error when used on the client.
 
 * Added --prng option to control PRNG (pseudo-random
   number generator) parameters.  In previous OpenVPN
   versions, the PRNG was hardcoded to use the SHA1
   hash.  Now any OpenSSL hash may be used.  This is
   part of an effort to remove hardcoded references to
   a specific cipher or cryptographic hash algorithm.
 
 * Cleaned up man page synopsis.
 

 2008.11.16 -- Version 2.1_rc14

 
 * Added AC_GNU_SOURCE to configure.ac to enable struct ucred,
   with the goal of fixing a build issue on Fedora 9 that was
   introduced in 2.1_rc13.
 

 * Added additional method parameter to --script-security to preserve
   backward compatibility with system() call semantics used in OpenVPN
   2.1_rc8 and earlier.  To preserve backward compatibility use:
 
     script-security 3 system
 

 * Added additional warning messages about --script-security 2
   or higher being required to execute user-defined scripts or
   executables.
 
 * Windows build system changes:
 
   Modified Windows domake-win build system to write all openvpn.nsi
   input files to gen, so that gen can be disconnected from
   the rest of the source tree and makensis openvpn.nsi will
   still function correctly.
 
   Added additional SAMPCONF_(CA|CRT|KEY) macros to settings.in
   (commented out by default).
 
   Added optional files SAMPCONF_CONF2 (second sample configuration
   file) and SAMPCONF_DH (Diffie-Helman parameters) to Windows
   build system, and may be defined in settings.in.
 
 * Extended Management Interface "bytecount" command
   to work when OpenVPN is running as a server.
   Documented Management Interface "bytecount" command in
   management/management-notes.txt.
 
 * Fixed informational message in ssl.c to properly indicate
   deferred authentication.
 
 * Added server-side --auth-user-pass-optional directive, to allow
   connections by clients that do not specify a username/password, when a
   user-defined authentication script/module is in place (via
   --auth-user-pass-verify, --management-client-auth, or a plugin module).
 
 * Changes to easy-rsa/2.0/pkitool and related openssl.cnf:
 
   Calling scripts can set the KEY_NAME environmental variable to set
   the "name" X509 subject field in generated certificates.
 
   Modified pkitool to allow flexibility in separating the Common Name
   convention from the cert/key filename convention.
 
   For example:
 
   KEY_CN="James's Laptop" KEY_NAME="james" ./pkitool james
 
   will create a client certificate/key pair of james.crt/james.key
   having a Common Name of "James's Laptop" and a Name of "james".
 
 * Added --no-name-remapping option to allow Common Name, X509 Subject,
   and username strings to include any printable character including
   space, but excluding control characters such as tab, newline, and
   carriage-return (this is important for compatibility with external
   authentication systems).
 
   As a related change, added --status-version 3 format (and "status 3"
   in the management interface) which uses the version 2 format except
   that tabs are used as delimiters instead of commas so that there
   is no ambiguity when parsing a Common Name that contains a comma.
 
   Also, save X509 Subject fields to environment, using the naming
   convention:
 
   X509_{cert_depth}_{name}={value}
 
   This is to avoid ambiguities when parsing out the X509 subject string
   since "/" characters could potentially be used in the common name.
 
 * Fixed some ifconfig-pool issues that precluded it from being combined
   with --server directive.
 
   Now, for example, we can configure thusly:
 
     server 10.8.0.0 255.255.255.0 nopool
     ifconfig-pool 10.8.0.2 10.8.0.99 255.255.255.0
 
   to have ifconfig-pool manage only a subset
   of the VPN subnet.
 
 * Added config file option "setenv FORWARD_COMPATIBLE 1" to relax
   config file syntax checking to allow directives for future OpenVPN
   versions to be ignored.
 

 2008.10.07 -- Version 2.1_rc13
 
 * Bundled OpenSSL 0.9.8i with Windows installer.
 
 * Management interface can now listen on a unix
   domain socket, for example:
 
     management /tmp/openvpn unix
 
   Also added management-client-user and management-client-group
   directives to control which processes are allowed to connect
   to the socket.
 
 * Copyright change to OpenVPN Technologies, Inc.
 

 2008.09.23 -- Version 2.1_rc12
 
 * Patched Makefile.am so that the new t_cltsrv-down.sh script becomes
   part of the tarball (Matthias Andree).
 
 * Fixed --lladdr bug introduced in 2.1-rc9 where input validation code
   was incorrectly expecting the lladdr parameter to be an IP address
   when it is actually a MAC address (HoverHell).

 2008.09.14 -- Version 2.1_rc11
 
 * Fixed a bug that can cause SSL/TLS negotiations in UDP mode
   to fail if UDP packets are dropped.
 

 2008.09.10 -- Version 2.1_rc10
 
 * Added "--server-bridge" (without parameters) to enable
   DHCP proxy mode:  Configure server mode for ethernet
   bridging using a DHCP-proxy, where clients talk to the
   OpenVPN server-side DHCP server to receive their IP address
   allocation and DNS server addresses.
 
 * Added "--route-gateway dhcp", to enable the extraction
   of the gateway address from a DHCP negotiation with the
   OpenVPN server-side LAN.
 
 * Fixed minor issue with --redirect-gateway bypass-dhcp or bypass-dns
   on Windows.  If the bypass IP address is 0.0.0.0 or 255.255.255.255,
   ignore it.
 
 * Warn when ethernet bridging that the IP address of the bridge adapter
   is probably not the same address that the LAN adapter was set to
   previously.
 
 * When running as a server, warn if the LAN network address is
   the all-popular 192.168.[0|1].x, since this condition commonly
   leads to subnet conflicts down the road.
 
 * Primarily on the client, check for subnet conflicts between
   the local LAN and the VPN subnet.
 
 * Added a 'netmask' parameter to get_default_gateway, to return
   the netmask of the adapter containing the default gateway.
   Only implemented on Windows so far.  Other platforms will
   return 255.255.255.0.  Currently the netmask information is
   only used to warn about subnet conflicts.
 
 * Minor fix to cryptoapi.c to not compile itself unless USE_CRYPTO
   and USE_SSL flags are enabled (Alon Bar-Lev).
 
 * Updated openvpn/t_cltsrv.sh (used by "make check") to conform to new
   --script-security rules.  Also adds retrying if the addresses are in
   use (Matthias Andree).
 
 * Fixed build issue with ./configure --disable-socks --disable-http.
 
 * Fixed separate compile errors in options.c and ntlm.c that occur
   on strict C compilers (such as old versions of gcc) that require
   that C variable declarations occur at the start of a {} block,
   not in the middle.
 
 * Workaround bug in OpenSSL 0.9.6b ASN1_STRING_to_UTF8, which
   the new implementation of extract_x509_field_ssl depends on.
 
 * LZO compression buffer overflow errors will now invalidate
   the packet rather than trigger a fatal assertion.
 
 * Fixed minor compile issue in ntlm.c (mid-block declaration).
 
 * Added --allow-pull-fqdn option which allows client to pull DNS names
   from server (rather than only IP address) for --ifconfig, --route, and
   --route-gateway.  OpenVPN versions 2.1_rc7 and earlier allowed DNS names
   for these options to be pulled and translated to IP addresses by default.
   Now --allow-pull-fqdn will be explicitly required on the client to enable
   DNS-name-to-IP-address translation of pulled options.
 
 * 2.1_rc8 and earlier did implicit shell expansion on script
   arguments since all scripts were called by system().
   The security hardening changes made to 2.1_rc9 no longer
   use system(), but rather use the safer execve or CreateProcess
   system calls.  The security hardening also introduced a
   backward incompatibility with 2.1_rc8 and earlier in that
   script parameters were no longer shell-expanded, so
   for example:
 
     client-connect "docc CLIENT-CONNECT"
 
   would fail to work because execve would try to execute
   a script called "docc CLIENT-CONNECT" instead of "docc"
   with "CLIENT-CONNECT" as the first argument.
 
   This patch fixes the issue, bringing the script argument
   semantics back to pre 2.1_rc9 behavior in order to preserve
   backward compatibility while still using execve or CreateProcess
   to execute the script/executable.
 
 * Modified ip_or_dns_addr_safe, which validates pulled DNS names,
   to more closely conform to RFC 3696:
 
   (1) DNS name length must not exceed 255 characters
 
   (2) DNS name characters must be limited to alphanumeric,
       dash ('-'), and dot ('.')
 
 * Fixed bug in intra-session TLS key rollover that was introduced with
   deferred authentication features in 2.1_rc8.
 

 2008.07.31 -- Version 2.1_rc9
 

 * Security Fix -- affects non-Windows OpenVPN clients running

   OpenVPN 2.1-beta14 through 2.1-rc8 (OpenVPN 2.0.x clients are NOT
   vulnerable nor are any versions of the OpenVPN server vulnerable).
   An OpenVPN client connecting to a malicious or compromised
   server could potentially receive an "lladdr" or "iproute" configuration
   directive from the server which could cause arbitrary code execution on
   the client. A successful attack requires that (a) the client has agreed
   to allow the server to push configuration directives to it by including
   "pull" or the macro "client" in its configuration file, (b) the client

   successfully authenticates the server, (c) the server is malicious or has

   been compromised and is under the control of the attacker, and (d) the
   client is running a non-Windows OS.  Credit: David Wagner.

   CVE-2008-3459

 
 * Miscellaneous defensive programming changes to multiple
   areas of the code.  In particular, use of the system() call
   for calling executables such as ifconfig, route, and
   user-defined scripts has been completely revamped in favor
   of execve() on unix and CreateProcess() on Windows.
 

 * In Windows build, package a statically linked openssl.exe to work around
   observed instabilities in the dynamic build since the migration to
   OpenSSL 0.9.8h.
 

 2008.06.11 -- Version 2.1_rc8
 
 * Added client authentication and packet filtering capability
   to management interface.  In addition, allow OpenVPN plugins
   to take advantage of deferred authentication and packet
   filtering capability.
 
 * Added support for client-side connection profiles.
 
 * Fixed unbounded memory growth bug in environmental variable
   code that could have caused long-running OpenVPN sessions
   with many TLS renegotiations to incrementally
   increase memory usage over time.
 
 * Windows release now packages openssl-0.9.8h.
 
 * Build system changes -- allow building on Windows using
   autoconf/automake scripts (Alon Bar-Lev).
 
 * Changes to Windows build system to make it easier to do
   partial builds, with a reduced set of prerequisites,
   where only a subset of OpenVPN installer
   components are built.  See ./domake-win comments.
 
 * Cleanup IP address for persistence interfaces for tap and also
   using ifconfig, gentoo#209055 (Alon Bar-Lev).
 
 * Fall back to old version of extract_x509_field for OpenSSL 0.9.6.
 
 * Clarified tcp-queue-limit man page entry (Matti Linnanvuori).
 
 * Added new OpenVPN icon and installer graphic.
 
 * Minor pkitool changes.
 
 * Added --pkcs11-id-management option, which will cause OpenVPN to
   query the management interface via the new NEED-STR asynchronous
   notification query to get additional PKCS#11 options (Alon Bar-Lev).
 
 * Added NEED-STR management interface asynchronous query and
   "needstr" management interface command to respond to the query
   (Alon Bar-Lev).
 
 * Added Dragonfly BSD support (Francis-Gudin).
 
 * Quote device names before passing to up/down script (Josh Cepek).
 
 * Bracketed struct openvpn_pktinfo with #pragma pack(1) to
   prevent structure padding from causing an incorrect length
   to be returned by sizeof (struct openvpn_pktinfo) on 64-bit
   platforms.
 
 * On systems that support res_init, always call it
   before calling gethostbyname to ensure that
   resolver configuration state is current.
 
 * Added NTLMv2 proxy support (Miroslav Zajic).
 
 * Fixed an issue in extract_x509_field_ssl where the extraction
   would fail on the first field of the subject name, such as
   the common name in:  /CN=foo/emailAddress=foo@bar.com
 
 * Made "Linux ip addr del failed" error nonfatal.
 
 * Amplified --client-cert-not-required warning.
 
 * Added #pragma pack to proto.h.
 

 2008.01.29 -- Version 2.1_rc7
 
 * Added a few extra files that exist in the svn repo but were
   not being copied into the tarball by make dist.
 
 * Fixup null interface on close, don't use ip addr flush (Alon Bar-Lev).
 

 2008.01.24 -- Version 2.1_rc6
 
 * Fixed options checking bug introduced in rc5 where legitimate configuration
   files might elicit the error: "Options error: Parameter pkcs11_private_mode
   can only be specified in TLS-mode, i.e. where --tls-server or --tls-client
   is also specified."
 	

 2008.01.23 -- Version 2.1_rc5
 
 * Fixed Win2K TAP driver bug that was introduced by Vista fixes,
   incremented driver version to 9.4.
 
 * Windows build system changes:
 
   Incremented included OpenSSL version to openssl-0.9.7m.
 
   Updated openssl.patch for openssl-0.9.7m and added some
   brief usage comments to the head of the patch.
 
   Added build-pkcs11-helper.sh for building the pkcs11-helper
   library.
 
   Integrated inclusion of pkcs11-helper into Windows build
   system.
 
   Upgraded TAP build scripts to use WDK 6001.17121
   (Windows 2008 Server pre-RTM).
 
 * Windows installer changes:
 
   Clean up the start menu folder.
 
   Allow for a site-specific sample configuration file and keys
   to be included in a custom installer (see SAMPCONF macros
   in settings.in). 
 
   New icon (temporary).
 
 * Added "forget-passwords" command to the management interface
   (Alon Bar-Lev).
 
 * Added --management-signal option to signal SIGUSR1 when the
   management interface disconnects (Alon Bar-Lev).
 
 * Modified command line and config file parser to allow
   quoted strings using single quotes ('') (Alon Bar-Lev).
 
 * Use pkcs11-helper as external library, can be downloaded from
   https://www.opensc-project.org/pkcs11-helper (Alon Bar-Lev).
 
 * Fixed interim memory growth issue in TCP connect loop where
   "TCP: connect to %s failed, will try again in %d seconds: %s"
   is output.
 
 * Fixed bug in epoll driver in event.c, where the lack of a
   handler for EPOLLHUP could cause 99% CPU usage.
 
 * Defined ALLOW_NON_CBC_CIPHERS for people who don't
   want to use a CBC cipher for OpenVPN's data channel.
 
 * Added PLUGIN_LIBDIR preprocessor string to prepend a default
   plugin directory to the dlopen search list when the user
   specifies the basename of the plugin only (Marius Tomaschewski).
 
 * Rewrote extract_x509_field and modified COMMON_NAME_CHAR_CLASS
   to allow forward slash characters ("/") in the X509 common name
   (Pavel Shramov).
 
 * Allow OpenVPN to run completely unprivileged under Linux
   by allowing openvpn --mktun to be used with --user and --group
   to set the UID/GID of the tun device node.  Also added --iproute
   option to allow an alternative command to be executed in place
   of the default iproute2 command (Alon Bar-Lev).
 
 * Fixed --disable-iproute2 in ./configure to actually disable
   iproute2 usage (Alon Bar-Lev).
 
 * Added --management-forget-disconnect option -- forget
   passwords when management session disconnects (Alon Bar-Lev).
 	

 2007.04.25 -- Version 2.1_rc4
 
 * Worked out remaining issues with TAP driver signing
   on Vista x64.  OpenVPN will now run on Vista x64
   with driver signing enforcement enabled.
 
 * Fixed 64-bit portability bug in time_string function
   (Thomas Habets).
 

 2007.04.22 -- Version 2.1_rc3
 
 * Additional fixes to TAP driver for Windows x64.  Driver
   now runs successfully on Vista x64 if driver signing
   enforcement is disabled.
 	
 * The Windows Installer and TAP driver are now signed by

   OpenVPN Solutions LLC (in addition to the usual GnuPG
   signatures).
 
 * Added OpenVPN GUI (Mathias Sundman version) as install
   option in Windows installer.

 
 * Clean up configure on FreeBSD for recent autotool versions
   that require that all .h files have to be compiled.
   Also, FreeBSD install does not support GNU long options
   which the Makefile in easy-rsa/2.0 uses (not checked the
   others as we don't install those on Gentoo) (Roy Marples).
 
 * Added additional scripts to easy-rsa/Windows for working
   with password-protected keys; also add -extensions server
   option when generating server cert via
   build-key-server-pass.bat (Daniel Zauft).
 	

 2007.02.27 -- Version 2.1_rc2
 
 * auth-pam change:  link with -lpam rather
   than dlopen (Roy Marples).
 
 * Prevent SIGUSR1 or SIGHUP from causing program
   exit from initial management hold.
 
 * SO_REUSEADDR should not be set on Windows TCP sockets
   because it will cause bind to succeed on port conflicts.
 
 * Added time_ascii, time_duration, and time_unix
   environmental variables for plugins and callback
   scripts.
 
 * Fixed issue where OpenVPN does not apply the --txqueuelen option
   to persistent interfaces made with --mktun (Roy Marples).
 
 * Attempt at rational signal handling when in the
   management hold state.  During management hold, ignore
   SIGUSR1/SIGHUP signals thrown with the "signal" command.
   Also, "signal" command will now apply remapping as
   specified with the --remap-usr1 option.
   When a signal entered using the "signal" command from a management
   hold is ignored, output: >HOLD:Waiting for hold release
 
 * Fixed issue where struct env_set methods that
   change the value of an existing name=value pair
   would delay the freeing of the memory held by
   the previous name=value pair until the underlying
   client instance object is closed.
   This could cause a server that handles long-term
   client connections, resulting in many periodic calls
   to verify_callback, to needlessly grow the env_set
   memory allocation until the underlying client instance
   object is closed.
 
 * Renamed TAP-Win32 driver from tap0801.sys to tap0901.sys
   to reflect the fact that Vista has blacklisted the tap0801.sys
   file name due to previous compatibility issues which have now
   been resolved.  TAP-Win32 major/minor version number is now 9/1.
 
 * Windows installer will delete a previously installed
   tap0801.sys TAP driver before installing tap0901.sys.
 
 * Added code to Windows installer to fail gracefully on 64 bit
   installs until 64-bit TAP driver issues can be resolved.
 
 * Added code to Windows installer to fail gracefully on
   versions of Windows which are not explicitly supported.
 
 * The Windows version will now use a default route-delay
   of 5 seconds to deal with an apparent routing table race
   condition on Vista.
 
 * Worked around an incompatibility in the Windows Vista
   version of CreateIpForwardEntry as described in
   http://www.nynaeve.net/?p=59
   This issue would cause route additions using the
   IP Helper API to fail on Vista.
 
 * On Windows, revert to "ip-win32 dynamic" as the default.
 

 2006.10.31 -- Version 2.1_rc1
 
 * Support recovery (return to hold) from signal at
   management password prompt.
 
 * Added workaround for OpenSC PKCS#11 bug#108
   (Alon Bar-Lev).
 

 2006.10.01 -- Version 2.1-beta16
 
 * Windows installer updated with OpenSSL 0.9.7l DLLs to fix
   published vulnerabilities.

 
 * Fixed TAP-Win32 bug that caused BSOD on Windows Vista
   (Henry Nestler).
 	
 * Autodetect 32/64 bit Windows in installer and install
   appropriate TAP driver (Mathias Sundman, Hypherion).
 	
 * Fixed bug in loopback self-test introduced
   in 2.1-beta15 where self test as invoked by
   "make check" would not properly exit after
   2 minutes (Paul Howarth).
 

 2006.09.12 -- Version 2.1-beta15
 
 * Windows installer updated with OpenSSL 0.9.7k DLLs to fix
   RSA Signature Forgery (CVE-2006-4339).
 
 * Fixed bug introduced with the --port-share directive
   (back in 2.1-beta9 which causes TLS soft resets
   (1 per hour by default) in TCP server mode to force
   a blockage of tunnel packets and later time-out and
   restart the connection.
 

 * easy-rsa update (Alon Bar-Lev)
   Makefile (install) is now available so that
   distribs will be able to install it safely.
 
 * PKCS#11 changes: (Alon Bar-Lev) 
   - Modified ssl.c to not FATAL and return to init.c
     so auth-retry will work.
   - Modifed pkcs11-helper.c to fix some problem with
     multiple providers.
   - Added retry counter to PKCS#11 PIN hook.
   - Modified PKCS#11 PIN retry loop to return correct error
     code when PIN is incorrect.
   - Fix handling (ignoring) zero sized attributes.
   - Fix gcc-2 issues.
   - Fix openssl 0.9.6 (first version) issues.
 
 * Minor fixes of lladdr (Alon Bar-Lev)
   Updated makefile.w32-vc to include lladdr.*, updated
   linkage libraries.
   Modified lladdr.c to be compiled under visual C.

 
 * Added two new management states:
    OPENVPN_STATE_RESOLVE      -- DNS lookup
    OPENVPN_STATE_TCP_CONNECT  -- Connecting to TCP server
 
 * Echo management state change to log.
 
 * Minor syshead.h change for NetBSD to allow
   TCP_NODELAY flag to work.
 
 * Modified --port-share code to remove the assumption that
   CMSG_SPACE always evaluates to a constant, to enable
   compilation on NetBSD and possibly other BSDs as well.
 
 * Eliminated gcc 3.3.3 warnings on NetBSD
   when ./configure --enable-strict is used.
 
 * Added optional minimum-number-of-bytes parameter
   to --inactive directive.
 

 2006.04.13 -- Version 2.1-beta14
 
 * Fixed Windows server bug in time backtrack handling code which
   could cause TLS negotiation failures on legitimate clients.

 * Rewrote gettimeofday function for Windows to be
   simpler and more efficient.

 * Merged PKCS#11 extensions to easy-rsa/2.0  (Alon Bar-Lev).

 
 * Added --route-metric option to set a default route metric
   for --route (Roy Marples).

 
 * Added --lladdr option to specify the link layer (MAC) address
   for the tap interface on non-Windows platforms (Roy Marples).
 

 2006.04.12 -- Version 2.1-beta13
 
 * Code added in 2.1-beta7 and 2.0.6-rc1 to extend byte counters
   to 64 bits caused a bug in the Windows version which has now
   been fixed.  The bug could cause intermittent crashes.
 	

 2006.04.05 -- Version 2.1-beta12
 
 * Security Vulnerability -- An OpenVPN client connecting to a
   malicious or compromised server could potentially receive
   "setenv" configuration directives from the server which could
   cause arbitrary code execution on the client via a LD_PRELOAD
   attack.  A successful attack appears to require that (a) the
   client has agreed to allow the server to push configuration
   directives to it by including "pull" or the macro "client" in
   its configuration file, (b) the client configuration file uses
   a scripting directive such as "up" or "down", (c) the client
   succesfully authenticates the server, (d) the server is
   malicious or has been compromised and is under the control of
   the attacker, and (e) the attacker has at least some level of
   pre-existing control over files on the client (this might be
   accomplished by having the server respond to a client web request

   with a specially crafted file).  Credit: Hendrik Weimer.
   CVE-2006-1629.

 
   The fix is to disallow "setenv" to be pushed to clients from
   the server, and to add a new directive "setenv-safe" which is
   pushable from the server, but which appends "OPENVPN_" to the
   name of each remotely set environmental variable.
 
 * "topology subnet" fix for FreeBSD (Benoit Bourdin).
 
 * PKCS11 fixes (Alon Bar-Lev).  For full description:
   svn log -r990 http://svn.openvpn.net/projects/openvpn/branches/BETA21
 	
 * When deleting routes under Linux, use the route metric
   as a differentiator to ensure that the route teardown
   process only deletes the identical route which was originally
   added via the "route" directive (Roy Marples).
 
 * Fix the t_cltsrv.sh file in FreeBSD 4 jails
   (Matthias Andree, Dirk Meyer, Vasil Dimov).
 
 * Extended tun device configure code to support ethernet
   bridging on NetBSD (Emmanuel Kasper).
 

 2006.02.19 -- Version 2.1-beta11
 
 * Fixed --port-share bug that caused premature closing
   of proxied sessions.
 

 2006.02.17 -- Version 2.1-beta10
 
 * Fixed --port-share breakage introduced in 2.1-beta9.
 

 2006.02.16 -- Version 2.1-beta9

 * Added --port-share option for allowing OpenVPN and HTTPS
   server to share the same port number.

 * Added --management-client option to connect as a client
   to management GUI app rather than be connected to as a
   server.

 * Added "bytecount" command to management interface.

 * --remote-cert-tls fixes (Alon Bar-Lev).

 2006.01.03 -- Version 2.1-beta8

 
 * --remap-usr1 will now also remap signals thrown during
   initialization.

 * Added --connect-timeout option to control the timeout
   on TCP client connection attempts (doesn't work on all
   OSes).  This patch also makes OpenVPN signalable during
   TCP connection attempts.

 * Fixed bug in acinclude.m4 where capability of compiler
   to handle zero-length arrays in structs is tested
   (David Stipp).
 * Fixed typo in manage.c where inline function declaration
   was declared without the "static" keyword (David Stipp).

 * Patch to support --topology subnet on Mac OS X (Mathias Sundman).

 * Added --auto-proxy directive to auto-detect HTTP or SOCKS
   proxy settings (currently Windows only).

 * Removed redundant base64 code.
 * Better sanity checking of --server and --server-bridge
   IP pool ranges, so as not to hit the assertion at
   pool.c:119 (2.0.5).
 * Fixed bug where --daemon and --management-query-passwords
   used together would cause OpenVPN to block prior to
   daemonization.
 * Fixed client/server race condition which could occur
   when --auth-retry interact is set and the initially
   provided auth-user-pass credentials are incorrect,
   forcing a username/password re-query.
 * Fixed bug where if --daemon and --management-hold are
   used together, --user or --group options would be ignored.

 * --ip-win32 adaptive is now the default.
 * --ip-win32 netsh (or --ip-win32 adaptive when in netsh
   mode) can now set DNS/WINS addresses on the TAP-Win32
   adapter.

 * Added new option --route-method adaptive (Win32)
   which tries IP helper API first, then falls back to
   route.exe.
 * Made --route-method adaptive the default.

 2005.11.12 -- Version 2.1-beta7

 * Allow blank passwords to be passed via the management
   interface.

 * Fixed bug where "make check" inside a FreeBSD "jail"
   would never complete (Matthias Andree).

 * Fixed bug where --server directive in --dev tap mode
   claimed that it would support subnets of /30 or less
   but actually would only accept /29 or less.

 * Extend byte counters to 64 bits (M. van Cuijk).

 * Fixed bug in Linux get_default_gateway function
   introduced in 2.0.4, which would cause redirect-gateway
   on Linux clients to fail.

 * Moved easy-rsa 2.0 scripts to easy-rsa/2.0 to
   be compatible with 2.0.x distribution.

 * Documented --route-nopull.

 * Documented --ip-win32 adaptive.

 * Windows build now linked with LZO2.

 * Allow ca, cert, key, and dh files to be specified
   inline via XML-like syntax without needing to
   reference an explicit file.
   For example:
   <ca>
 	data here...
   </ca>
 * Allow plugin and push directives to have multi-line
   parameter lists such as:
   <plugin>
     my-plugin.so
     parm1
     parm2
   </plugin>
 * Added connect-retry-max option (Alon Bar-Lev).
 * Fixed problems where signals thrown during initialization
   were not returning to a management-hold state.
 * Added a backtrack-hardened system time algorithm.
 * Added --remote-cert-ku, --remote-cert-eku, and
   --remote-cert-tls options for verifying certificate
   attributes (Alon Bar-Lev).
 * For Windows, reverted --ip-win32 default back to "dynamic".
   To use new adaptive mode, set explicitly.

 2005.11.01 -- Version 2.1-beta6

 * Security fix (merged from 2.0.4) -- Affects non-Windows

   OpenVPN clients of version 2.0 or higher which connect to
   a malicious or compromised server.  A format string
   vulnerability in the foreign_option function in options.c
   could potentially allow a malicious or compromised server

   to execute arbitrary code on the client.  Only
   non-Windows clients are affected.  The vulnerability
   only exists if (a) the client's TLS negotiation with
   the server succeeds, (b) the server is malicious or
   has been compromised such that it is configured to
   push a maliciously crafted options string to the client,
   and (c) the client indicates its willingness to accept
   pushed options from the server by having "pull" or

   "client" in its configuration file (Credit: Vade79).

   CVE-2005-3393
 * Security fix -- (merged from 2.0.4) Potential DoS
   vulnerability on the server in TCP mode.  If the TCP
   server accept() call returns an error status, the resulting
   exception handler may attempt to indirect through a NULL
   pointer, causing a segfault.  Affects all OpenVPN 2.0 versions.
   CVE-2005-3409

 * Fix attempt of assertion at multi.c:1586 (note that
   this precise line number will vary across different
   versions of OpenVPN).

 * Windows reliability changes:
   (a) Added code to make sure that the local PATH environmental
       variable points to the Windows system32 directory.
   (b) Added new --ip-win32 adaptive mode which tries 'dynamic'
       and then fails over to 'netsh' if the DHCP negotiation fails.
   (c) Made --ip-win32 adaptive the default.

 * More PKCS#11 additions/changes (Alon Bar-Lev).

 * Added ".PHONY: plugin" to Makefile.am to work around
   "make dist" issue.

 * Fixed double fork issue that occurs when --management-hold
   is used.
 * Moved TUN/TAP read/write log messages from --verb 8 to 6.
 * Warn when multiple clients having the same common name or
   username usurp each other when --duplicate-cn is not used.

 * Modified Windows and Linux versions of get_default_gateway
   to return the route with the smallest metric
   if multiple 0.0.0.0/0.0.0.0 entries are present.

 * Added ">NEED-OK" alert and "needok" command to management

   interface to provide a general interface for sending
   alerts to the end-user.  Used by the PKCS#11 code
   to send Token Insertion Requests to the user.

 * Added actual remote address used to the ">STATE" alert
   in the management interface (Rolf Fokkens).

 2005.10.17 -- Version 2.1-beta4

 
 * Fixed bug introduced in 2.1-beta3 where management
   socket bind would fail.

 * --capath fix in ssl.c (Zhuang Yuyao).

 * Added ".PHONY: plugin" to Makefile.am, reverted
   location of "plugin" directory (thanks to
   Matthias Andree for figuring this out).

 2005.10.16 -- Version 2.1-beta3

 * Added PKCS#11 support (Alon Bar-Lev).

 * Enable the use of --ca together with --pkcs12.  If --ca is
   used at the same time as --pkcs12, the CA certificate is loaded
   from the file specified by --ca regardless if the pkcs12 file
   contains a CA cert or not (Mathias Sundman).

 * Merged --capath patch (Thomas Noel).

 * Merged --multihome patch.

 * Added --bind option for TCP client connections (Ewan Bhamrah
   Harley).
 * Moved "plugin" directory to "plugins" to deal with strange
   automake problem that ended up being also fixable with
   ".PHONY: plugin" in Makefile.am.

 2005.10.13 -- Version 2.1-beta2
 
 * Made --sndbuf and --rcvbuf pushable.
 

 2005.10.01 -- Version 2.1-beta1

 
 * Made LZO setting pushable.
 * Renamed sample-keys/tmp-ca.crt to ca.crt.
 * Fixed bug where remove_iroutes_from_push_route_list
   was missing routes if those routes had
   an implied netmask (by omission) of 255.255.255.255. 

 * Merged with 2.0.3-rc1
 * easy-rsa/2.0 moved to easy-rsa
 * old easy-rsa moved to easy-rsa/1.0
 
 2005.09.23 -- Version 2.0.2-TO4
 
 * Added feature to TAP-Win32 adapter to allow it to be
   opened from non-administrator mode.  This feature
   is enabled by default, and can be enabled/disabled
   in the adapter advanced properties dialog.
 * Added --allow-nonadmin standalone option for Windows to
   set TAP adapter to allow non-admin access.  This
   is a user-mode version of the code, and duplicates
   the same feature as the above entry.
 * Added fix that attempts to solve corner case of tunnel not
   forwarding packets when system clock is reset to an earlier time.
 * Added --redirect-gateway bypass-dns option.  (Developers:
   To add bypass-dhcp or bypass-dns support to other OSes,
   add a get_bypass_addresses function to route.c for
   your OS.)
 * Added OPENVPN_PLUGIN_CLIENT_CONNECT_V2 plugin callback, which
   allows a client-connect plugin to return configuration text
   in memory, rather than via a file.
 * Fixed a bug where --mode server --proto tcp-server --cipher none
   operation could cause tunnel packet truncation.
 * openvpn --version will show [LZO1] or [LZO2], depending on
   version that was linked.
 
 2005.09.07 -- Version 2.0.2-TO1
 
 * Added --topology directive.  See man page.
 * Added --redirect-gateway bypass-dhcp option to add a route
   allowing DHCP packets to bypass the tunnel, when the
   DHCP server is non-local.  Currently only implemented
   on Windows clients.
 * Modified OpenVPN Service on Windows to declare the DHCP
   client service as a dependency.
 * Extended the plugin interface to allow plugins to declare
   per-client constructor and destructor functions, to make
   it simpler for plugins to maintain per-client state.

 
 2005.09.25 -- Version 2.0.3-rc1	

 
 * openvpn_plugin_abort_v1 function wasn't being properly
   registered on Windows.
 * Fixed a bug where --mode server --proto tcp-server --cipher none
   operation could cause tunnel packet truncation.
 
 2005.08.25 -- Version 2.0.2
 
 * No change from 2.0.2-rc1.
 
 2005.08.24 -- Version 2.0.2-rc1
 
 * Fixed regression bug in Win32 installer, introduced in 2.0.1,
   which incorrectly set OpenVPN service to autostart.
 * Don't package source code zip file in Windows installer
   in order to reduce the size of the installer.  The source
   zip file can always be downloaded separately if needed.
 * Fixed bug in route.c in FreeBSD, Darwin, OpenBSD and NetBSD
   version of get_default_gateway.  Allocated socket for route
   manipulation is never freed so number of mbufs continuously
   grow and exhaust system resources after a while (Jaroslav Klaus).
 * Fixed bug where "--proto tcp-server --mode p2p --management
   host port" would cause the management port to not respond until
   the OpenVPN peer connects.
 * Modified pkitool script to be /bin/sh compatible (Johnny Lam).
 
 2005.08.16 -- Version 2.0.1
 	
 * Security Fix -- DoS attack against server when run with "verb 0" and
   without "tls-auth".  If a client connection to the server fails
   certificate verification, the OpenSSL error queue is not properly
   flushed, which can result in another unrelated client instance on the
   server seeing the error and responding to it, resulting in disconnection
   of the unrelated client (CAN-2005-2531).
 * Security Fix -- DoS attack against server by authenticated client.
   This bug presents a potential DoS attack vector against the server
   which can only be initiated by a connected and authenticated client.
   If the client sends a packet which fails to decrypt on the server,
   the OpenSSL error queue is not properly flushed, which can result in
   another unrelated client instance on the server seeing the error and
   responding to it, resulting in disconnection of the unrelated client

   (CAN-2005-2532).  Credit: Mike Ireton.

 * Security Fix -- DoS attack against server by authenticated client.
   A malicious client in "dev tap" ethernet bridging mode could
   theoretically flood the server with packets appearing to come from
   hundreds of thousands of different MAC addresses, causing the OpenVPN
   process to deplete system virtual memory as it expands its internal
   routing table.  A --max-routes-per-client directive has been added
   (default=256) to limit the maximum number of routes in OpenVPN's
   internal routing table which can be associated with a given client
   (CAN-2005-2533).
 * Security Fix -- DoS attack against server by authenticated client.
   If two or more client machines try to connect to the server at the
   same time via TCP, using the same client certificate, and when
   --duplicate-cn is not enabled on the server, a race condition can
   crash the server with "Assertion failed at mtcp.c:411"
   (CAN-2005-2534).
 * Fixed server bug where under certain circumstances, the client instance
   object deletion function would try to delete iroutes which had never been
   added in the first place, triggering "Assertion failed at mroute.c:349".
 * Added --auth-retry option to prevent auth errors from being fatal
   on the client side, and to permit username/password requeries in case
   of error.  Also controllable via new "auth-retry" management interface
   command.  See man page for more info.
 * Added easy-rsa 2.0 scripts to the tarball in easy-rsa/2.0
 * Fixed bug in openvpn.spec where rpmbuild --define 'without_pam 1'
   would fail to build.
 * Implement "make check" to perform loopback tests (Matthias Andree).
 
 2005.07.21 -- Version 2.0.1-rc7
 
 * Support LZO 2.01 which renamed its library to lzo2 (Matthias Andree).
 * Include linux/types.h before checking for linux/errqueue.h (Matthias
   Andree).
 
 2005.07.15 -- Version 2.0.1-rc6
 
 * Commented out "user nobody" and "group nobody" in sample
   client/server config files.
 * Allow '@' character to be used in --client-config-dir
   file names.
 
 2005.07.04 -- Version 2.0.1-rc5
 
 * Windows version will log a for-further-info URL when
   initialization sequence is completed with errors.
 * Added DLOPEN_PAM parameter to plugin/auth-pam/Makefile
   to control whether auth-pam plugin links to PAM via
   dlopen or -lpam.  By default, DLOPEN_PAM=1 so pre-existing
   behavior should be preserved.  DLOPEN_PAM=0 is the preferred
   setting to link via -lpam, but DLOPEN_PAM=1 works around
   a bug in SuSE 9.1 (and possibly other distros as well)
   where the PAM modules are not linked with -lpam.  See
   thread on openvpn-devel for more discussion about this
   patch (Simon Perreault).
 
 2005.06.15 -- Version 2.0.1-rc4
 
 * Support LZO 2.00, including changes to configure script to
   autodetect LZO version.
 
 2005.06.12 -- Version 2.0.1-rc3
 
 * Fixed a bug which caused standard file handles to not be closed
   after daemonization when --plugin and --daemon are used together,
   and if the plugin initialization function forks (as does auth-pam
   and down-root) (Simon Perreault).
 * Added client-side up/down scripts in contrib/pull-resolv-conf
   for accepting server-pushed "dhcp-option DOMAIN" and "dhcp-option DNS"
   on Linux/Unix systems (Jesse Adelman).
 * Fixed bug where if client-connect scripts/plugins were cascaded,
   and one (but not all) of them returned an error status, there might
   be cases where for an individual script/plugin, client-connect was
   called but not client-disconnect.  The goal of this fix is to
   ensure that if client-connect is called on a given client instance,
   then client-disconnect will definitely be called.  A potential
   complication of this fix is that when client-connect functions are
   cascaded, it's possible that the client-disconnect function would
   be called in cases where the related client-connect function returned
   an error status.  This fix should not alter OpenVPN behavior when
   scripts/plugins are not cascaded.
 * Changed the hard-to-reproduce "Assertion failed at fragment.c:312"
   fatal error to a warning: "FRAG: outgoing buffer is not empty".
   Need more info on how to reproduce this one.
 * When --duplicate-cn is used, the --ifconfig-pool allocation
   algorithm will now allocate the first available IP address.
 * When --daemon and --management-hold are used together,
   OpenVPN will daemonize before it enters the management hold state.
 
 2005.05.16 -- Version 2.0.1-rc2
 
 * Modified vendor test in openvpn.spec file to match against
   "Mandrakesoft" in addition to "MandrakeSoft".
 * Using --iroute in a --client-config-dir file while in --dev tap
   mode is not currently supported and will produce a warning
   message. Fixed bug where in certain cases, in addition to
   generating a warning message, this combination of options
   would also produce a fatal assertion in mroute.c.
 * Pass --auth-user-pass username to server-side plugin without
   performing any string remapping (plugins, unlike scripts,
   don't get any security benefit from string remapping).
   This is intended to fix an issue with openvpn-auth-pam/pam_winbind
   where backslash characters in a username ('\') were being remapped
   to underscore ('_').
 * Updated OpenSSL DLLs in Windows build to 0.9.7g.
 * Documented --explicit-exit-notify in man page.
 * --explicit-exit-notify seconds parameter defaults to 1 if
   unspecified.
 
 2005.04.30 -- Version 2.0.1-rc1
 
 * Fixed bug where certain kinds of fatal errors after
   initialization (such as port in use) would leave plugin
   processes (such as openvpn-auth-pam) still running.
 * Added optional openvpn_plugin_abort_v1 plugin function for
   closing initialized plugin objects in the event of a fatal
   error by main OpenVPN process.
 * When the --remote list is > 1, and --resolv-retry is not
   specified (meaning that it defaults to "infinite"), apply the
   infinite timeout to the --remote list as a whole, but try each
   list item only once before moving on to the next item.
 * Added new --syslog directive which redirects output
   to syslog without requiring the use of the --daemon or --inetd
   directives.
 * Added openvpn.spec option to allow RPM to be built with support
   for passwords read from a file:
   rpmbuild -tb [openvpn.x.tar.gz] --define 'with_password_save 1'
 
 2005.04.17 -- Version 2.0
 
 * Fixed minor options string typo in options.c.
 
 2005.04.10 -- Version 2.0-rc21
 
 * Change license description from "GPL Version 2 or (at your
   option) any later version" to just "GPL Version 2".
 
 2005.04.04 -- Version 2.0-rc20
 
 * Dag Wieers has put together an OpenVPN/LZO binary RPM set with
   excellent distro/version coverage for RH/EL/Fedora, though
   using his own SPEC.  I modified openvpn.spec to follow some of
   the same conventions such as putting sample scripts and doc
   files in %doc rather than /usr/share/openvpn.
 * Minor change to init scripts to run the user-defined script
   /etc/openvpn/openvpn-startup (if it exists) before any OpenVPN
   configs are started, and to run /etc/openvpn/openvpn-shutdown
   after all OpenVPN configs have been stopped.  The
   openvpn-startup script can be used for stuff like
   insmod tun.o, setting up firewall rules, or starting
   ethernet bridges.
 
 2005.03.29 -- Version 2.0-rc19
 
 * Omit additions of routes where the network and
   gateway are equal and the netmask is 255.255.255.255.
   This can come up if you are using both
   server/ifconfig-pool and client-config-dir with
   ifconfig-push static addresses for some subset of clients
   which directly reference the server IP address as the
   remote endpoint.
 	
 2005.03.28 -- Version 2.0-rc18
 
 * Packaged Windows installer with OpenSSL 0.9.7f.
 * Built Windows installer with NSIS 2.06.
 
 2005.03.12 -- Version 2.0-rc17
 
 * "MANAGEMENT: CMD" log file output will now only occur
   at --verb 7 or greater.
 * Added an optional name/value configuration list to
   the openvpn-auth-pam plugin module argument list.  See
   plugin/auth-pam/README for documentation. This is necessary
   in order for openvpn-auth-pam to work with queries generated
   by arbitrary PAM modules.
 * In both auth-pam and down-root plugins, in the forked process,
   a read error on the parent process socket is no longer fatal.
 * MandrakeSoft liblzo1 RPM only Provides for a 'liblzo1'.
   A conditional test of the vendor has been added to
   Require the appropriately named 'lzo' (liblzo1 / lzo).
   (Tom Walsh - http://openhardware.net)
 
 	
 2005.02.20 -- Version 2.0-rc16
 
 * Fixed bug introduced in rc13 where Windows service wrapper
   would be installed with a startup type of Automatic.
   This fix restores the previous behavior of installing
   with a startup type of Manual.
 
 2005.02.19 -- Version 2.0-rc15
 
 * Added warning when --keepalive is not used in a server
   configuration.
 * Don't include OpenSSL md4.h file if we are not building
   NTLM proxy support (Waldemar Brodkorb).
 * Added easy-rsa/build-key-pkcs12 and
   easy-rsa/Windows/build-key-pkcs12.bat scripts
   (Mathias Sundman).
 
 2005.02.16 -- Version 2.0-rc14
 
 * Fixed small memory leak that occurs when --crl-verify
   is used.
 * Upgraded Windows installer and .nsi script to NSIS 2.05
   (Mathias Sundman).
 * Changed #include backslash usage in cryptoapi.c to use
   forward slashes instead (Gisle Vanem).
 * Created easy-rsa/revoke-full to handle revocations in
   a single step: (a) revoke crt, (b) regenerate CRL, and
   (c) verify that revocation succeeded.
 * Renamed easy-rsa/Windows/revoke-key to revoke-full so
   that both *nix and Windows scripts are equivalent.
 	
 2005.02.11 -- Version 2.0-rc13
 
 * Improve human-readability of local/remote options
   diff, when inconsistencies are present.
 * For Windows easy-rsa, distribute vars.bat.sample and
   openssl.cnf.sample, then copy them to their normal
   filenames (without the .sample) when init-config.bat
   is run.  This is to prevent OpenVPN upgrades from
   wiping out vars.bat and openssl.cnf edits.
 * Modified service wrapper (Windows) to use a
   case-insensitive search when scanning for .ovpn files
   in \Program Files\OpenVPN\config.  Prior versions
   required an all-lower-case .ovpn file extension.
 * Miscellaneous service wrapper code cleanup.
 * If --user/--group is used on Windows, treat it
   as a no-op with a warning (this makes it easier to
   distribute the same client config file to Windows
   and *nix users).
 * Warn if --ifconfig-pool-persist is used with
   --duplicate-cn.
 
 2005.02.05 -- Version 2.0-rc12
 
 * Removed some debugging code inadvertently included
   in rc11 which would print the --auth-user-pass
   username/password provided by clients in the server
   logfile.
 * Client code for cycling through --remote list will
   retry the last address which successfully authenticated
   before moving on through the list.
 * Windows installer will now install sample configuration
   files in \Program Files\OpenVPN\sample-configs as well
   as generate a start menu shortcut to this directory.
 * Minor type change in buffer.[ch] to work around char-type
   ambiguity bug.  Caused management interface lock-ups on
   ARM when building with armv4b-hardhat-linux-gcc 2.95.3.
 
 2005.02.03 -- Version 2.0-rc11
 
 * Windows installer will now install easy-rsa directory
   in \Program Files\OpenVPN
 * Allow syslog facility to be controlled at compile time,
   e.g. -DLOG_OPENVPN=LOG_LOCAL6 (P Kern).
 * Changed certain shell scripts in distribution to use
   #!/bin/sh rather than #!/bin/bash for better portability.
 * If --ifconfig-pool-persist seconds parameter is 0, treat
   persist file as an allocation of fixed IP addresses
   (previous versions took IP-to-common-name associations
   from this list as hints, not mandatory static allocations).
 * Fixed bug on *nix where if --auth-user-pass and --log
   were used together, the username prompt would be sent to
   the log file rather than /dev/tty.
 * Spurious text in openvpn.8 detected by doclifter
   (Eric S. Raymond).
 * Call closelog later on daemon kill so that process
   exit message is written to syslog.
 
 2005.01.27 -- Version 2.0-rc10
 
 * When ./configure is run with plugins enabled (the default),
   check whether or not dlopen exists in libc before testing
   for libdl.  This is to fix an issue on FreeBSD and possibly
   other OSes which bundle libdl functions in libc.
 * On Windows, filter initial WSAEINVAL warning which occurs
   on the initial read attempt of an unbound socket.
 * The easy-rsa scripts build-key, build-key-pass, and
   build-key-server will now chmod the .key file
   to 0600.  This is in addition to the fact the generated
   keys directory has always been similarly protected
   (Pete Harlan).
 
 2005.01.23 -- Version 2.0-rc9
 
 * Fixed error "ROUTE: route addition failed using
   CreateIpForwardEntry ..." on Windows when --redirect-gateway
   is used over a RRAS internet link.
 * When using --route-method exe on Windows, include the
   gateway parameter on route delete commands (Mathias Sundman).
 * Try not to do a hard reset (i.e. SIGHUP) when two
   SIGUSR1 signals are received in close succession.
 * If the push list tries to grow beyond its buffer capacity,
   the resulting error will be non-fatal.
 * To increase the push list capacity (must be done on both
   client and server), increase TLS_CHANNEL_BUF_SIZE in
   common.h (default=1024).
 	
 2005.01.15 -- Version 2.0-rc8
 
 * Fixed bug introduced in rc7 where options error
   "--auth-user-pass requires --pull" might occur even
   if --pull was correctly specified.
 * Changed management interface code to bind once
   to TCP socket, rather than rebinding after every
   client disconnect.
 * Added "disable" directive for client-config-dir
   files.
 * Windows binary install is now distributed with
   OpenSSL 0.9.7e.
 * Query the management interface for --http-proxy
   username/password if authfile is set to "stdin".
 * Added current OpenVPN version number to "Unrecognized
   option or missing parameter" error message.
 * Added "-extensions server" to "openssl req" command
   in easy-rsa/build-key-server (Nir Yeffet).
 	
 2005.01.10 -- Version 2.0-rc7
 
 * Fixed bug in management interface which could cause
   100% CPU utilization in --proto tcp-server mode
   on all *nix OSes except for Linux 2.6.
 * --ifconfig-push now accepts DNS names as well as
   IP addresses.
 * Added sanity check errors when --pull or
   --auth-user-pass is used in an incorrect mode.
 * Updated man page entries for --client-connect and
   --ifconfig-push.
 * Added "String Types and Remapping" section to man
   page to consisely document the way which OpenVPN
   may convert certain types of characters in strings
   to ('_').
 * Modified bridging description in HOWTO to emphasize
   the fact that bridging allows Windows file and print
   sharing without a WINS server (Charles Duffy).
 
 2004.12.20 -- Version 2.0-rc6
 
 * Improved checking for epoll support in ./configure
   to fix false positive on RH9 (Jan Just Keijser).
 * Made the "MULTI TCP: I/O wait required blocking in
   multi_tcp_action, action=7" error nonfatal and replaced
   with "MULTI: Outgoing TUN queue full, dropped packet".
   So far the issue only seems to occur on Linux 2.2
   in --mode server --proto tcp mode.  It occurs when
   the TUN/TAP driver locks up and refuses to accept
   new packet writes for a second or more.
 * Fixed bug where if a --client-config-dir file tried
   to include another file using "config", and if that
   include failed, OpenVPN would abort with a fatal
   error.  Now such inclusion failures will be logged
   but are no longer fatal.
 * Global changes to the way that packet buffer alignment
   is handled.  Previously we didn't care about alignment
   and took care, when handling 16 and 32 bit words
   in buffers, to always use alignment-safe transfers.
   This approach appears to be inadequate on some
   architectures such as alpha.  The new approach is
   to initialize packet buffers in a way that anticipates
   how component structures will be allocated within
   them, to maintain correct alignment.
 * Added --dhcp-option DISABLE-NBT to disable NetBIOS
   over TCP (Jan Just Keijser).
 * Added --http-proxy-option directive for controlling
   miscellaneous HTTP proxy options.
 * Management state will no longer transition to "WAIT"
   during TLS renegotiations.
 
 2004.12.16 -- Version 2.0-rc5
 
 * The --client-config-dir option will now try to open
   a default file called "DEFAULT" if no file matching
   the common name of the incoming client was found.
 * The --client-connect script/plugin can now veto client
   authentication by returning a failure code.
 * The --learn-address script/plugin can now prevent a
   client-instance/address association from being learned
   by returning a failure code.
 * Changed RPM group in .spec file to Applications/Internet.
 
 2004.12.14 -- Version 2.0-rc4
 
 * SuSE only -- Fixed interaction between openvpn.spec and
   suse/openvpn.init where the .spec file was writing the
   OpenVPN binary to a different location than where the
   .init script was referencing it (Stefan Engel).
 * Solaris only -- Split Solaris ifconfig command into two
   parts (Jan Just Keijser).
 * Some cleanup in add_option().
 * Better error checking on input dotted quad IP addresses.
 * Verify that --push argument is quoted, if there is
   more than one.
 * More miscellaneous option sanity checks.
 
 2004.12.13 -- Version 2.0-rc3
 
 * On Windows, when --log or --log-append is used,
   save the original stderr for username and password
   prompts.
 * Fixed a bug introduced in the late 2.0 betas where
   if a "verb" parameter >= 16 was used, it would be
   ignored and the actual verb level would remain at 1.
 * Fixed a bug mostly seen on OS X where --management-hold
   or --management-query-passwords would cause the management
   interface to be unresponsive to incoming client connections.
 * Trigger an options error if one of the management-modifying
   options is used without "management" itself.
 
 2004.12.12 -- Version 2.0-rc2
 
 * Amplified warnings in documentation about possible
   man-in-the-middle attack when clients do not properly
   verify server certificate.  Changes to easy-rsa README,
   FAQ, HOWTO, man page, and sample client config file.
 * Added a warning message if --tls-client or --client
   is used without also specifying one of either
   --ns-cert-type, --tls-remote, or --tls-verify.
 * status_open() fixes for MSVC builds (Blaine Fleming).
 * Fix attempt of "ntlm.c:55: error: `des_cblock' undeclared"
   compiler error which has been reported on some platforms.
 * The openvpn.spec file for rpmbuild has several
   new build-time options.  See comments in the file.
 * Plugins are now built and packaged in the RPM and
   will be saved in /usr/share/openvpn/plugin/lib.
 * Added --management-hold directive to start OpenVPN
   in a hibernating state until released by the
   management interface.  Also added "hold" command
   to the management interface.
  	
 2004.12.07 -- Version 2.0-rc1
 
 * openvpn.spec workaround for SuSE confusion regarding
   /etc/init.d vs. /etc/rc.d/init.d (Stefan Engel).
 
 2004.12.05 -- Version 2.0-beta20
 
 * The ability to read --askpass and --auth-user-pass
   passwords from a file has been disabled by default.
   To re-enable, use ./configure --enable-password-save.
 * Added additional pre-connected states to management
   interface.  See management/management-notes.txt
   for more info.
 * State history is now recorded by the management
   interface, and the "state" command now works like
   the log or echo commands.
 * State history and real-time state change notifications
   are now prepended with an integer unix timestamp.
 * Added --http-proxy-timeout option, previously
   the timeout was hardcoded to 5 seconds.
 	
 2004.12.02 -- Version 2.0-beta19
 
 * Fixed bug in management interface line termination
   where output lines incorrectly contained a \00 char
   after the customary \0d \0a.
 * Fixed bug introduced in beta18 where Windows version
   would segfault on options errors.
 * Fixed bug in management interface where an empty
   quoted string ("") entered as a parameter would cause
   a segfault.
 * Fixed bug where --resolv-retry was not working
   properly with multiple --remote hosts.
 * Added additional ./configure options to reduce
   executable size for embedded applications.
   See ./configure --help.
 
 2004.11.28 -- Version 2.0-beta18
 
 * Added management interface.  See new --management-*
   options or the full management interface documentation
   in management/management-notes.txt in the tarball.
   Management interface inclusion can be disabled by
   ./configure --disable-management.
 * Added two new plugin modules: auth-pam and down-root.
   Auth-pam supports pam-based authentication using a
   split privilege execution model, while down-root enables
   a down script to be executed with root privileges, even
   when --user/--group is used to drop root privileges.
   See the plugin directory in the tarball for READMEs,
   source code, and Makefiles.
 * Plugin developers should note that some changes were
   made to the plugin interface since beta17.  See
   openvpn-plugin.h for details.
   Plugin interface inclusion can be disabled with
   ./configure --disable-plugins
 * Added easy-rsa/build-key-server script which will
   build a certificate with with nsCertType=server.
 * Added --ns-cert-type option for verification
   of nsCertType field in peer certificate.
 * If --fragment n is specified and --mssfix is specified
   without a parameter, default --mssfix to n.  This restores
   the 1.6 behavior when using --mssfix without a parameter.
 * Fixed SSL context initialization bug introduced in beta14
   where this error might occur on restarts: "Cannot load
   certificate chain ... PEM_read_bio:no start line".
 
 2004.11.11 -- Version 2.0-beta17
 
 * Changed default port number to 1194 per IANA official
   port number assignment.
 * Added --plugin directive which allows compiled
   modules to intercept script callbacks.  See
   plugin folder in tarball for more info.
 * Fixed bug introduced in beta12 where --key-method 1
   authentications which should have succeeded would fail.
 * Ignore SIGUSR1 during DNS resolution.
 * Added SuSE support to openvpn.spec (Umberto Nicoletti).
 * Fixed --cryptoapicert SUBJ: parsing bug (Peter 'Luna'
   Runestig).
 
 2004.11.07 -- Version 2.0-beta16
 
 * Modified sample-scripts/auth-pam.pl to get username
   and password from OpenVPN via a file rather than
   via environmental variables.
 * Added bytes_sent and bytes_received environmental
   variables to be set prior to client-disconnect script.
 * Changed client virtual IP derivation precedence:
   (1) use --ifconfig-push directive from --client-connect
   script, (2) use --ifconfig-push directive from
   --client-config-dir, and (3) use --ifconfig-pool
   address.
 * If a --client-config-dir file specifies --ifconfig-push,
   it will be visible to the --client-connect-script in
   the ifconfig_pool_remote_ip environmental variable.
 * For tun-style tunnels, the ifconfig_pool_local_ip
   environmental variable will be set, while for
   tap-style tunnels, the ifconfig_pool_netmask variable
   will be set.
 * Added intelligence to autoconf script to test
   compiler for the accepted form of zero-length arrays.
 * Fixed a bug introduced in beta12 where --ip-win32
   netsh would fail if --dev-node was not explicitly
   specified.
 * --ip-win32 netsh will now work on hidden adapters.
 * Fix attempt of "Assertion failed at crypto.c:149".
   This assertion has also been reported on 1.x with a
   slightly different line number.  The fix is twofold:
   (1) In previous releases, --mtu-test may trigger this
   assertion -- this bug has been fixed.  (2) If something
   else causes the assertion to be thrown, don't panic,
   just output a nonfatal warning to the log and drop
   the packet which generated the error.
 * Support TAP interfaces on Mac OS X (Waldemar Brodkorb).
 * Added --echo directive.
 * Added --auth-nocache directive.
 
 2004.10.28 -- Version 2.0-beta15
 
 * Changed environmental variable character classes
   so that names must consist of alphanumeric or
   underbar chars and values must consist of printable
   characters.  Illegal chars will be deleted.
   Versions prior to 2.0-beta12 were more restrictive
   and would map spaces to '.'.
 * On Windows, when the TAP adapter fails to
   initialize with the correct IP address, output
   "Initialization Sequence Completed with Errors"
   to the console or log file.
 * Added a warning when user/group/chroot is used
   without persist-tun and persist-key.
 * Added cryptoapi.[ch] to tarball and source zip.
 * --tls-remote option now works with common name
   prefixes as well as with the full X509 subject
   string.  This is a useful alternative to using
   a CRL on the client.
 * common names associated with a static
   --ifconfig-push setting will no longer leave
   any state in the --ifconfig-pool-persist file.
 * Hard TLS errors (TLS handshake failed) will now
   trigger either a SIGUSR1 signal by default
   or SIGTERM (if --tls-exit is specified).  In TCP
   mode, all TLS errors are considered to be hard.
   In server mode, the signal will be local to the
   client instance.
 * Added method parameter to --auth-user-pass-verify
   directive to select whether username/password
   is passed to script via environment or a temporary
   file.
 * Added --status-version option to control format
   of --status file.  The --mode server
   --status-version 2 format now includes a line
   type token, the virtual IP address is shown
   in the client list (even in --dev tap mode),
   and the integer time_t value is shown anywhere
   an ascii-formatted time/date is also shown.
 * Added --remap-usr1 directive which can be used
   to control whether internally or externally
   generated SIGUSR1 signals are remapped to
   SIGHUP (restart without persisting state) or
   SIGTERM (exit).
 * When running as a Windows service (using
   --service option), check the exit event before
   and after reading one line of input from
   stdin, when reading username/password info.
 * For developers: Extended the --gremlin function
   to better stress-test the new 2.0 features,
   added Valgrind support on Linux and Dmalloc
   support on Windows.
 
 2004.10.19 -- Version 2.0-beta14
 
 * Fixed a bug introduced in Beta12 that would occur
   if you use a --client-connect script without also
   defining --tmp-dir.
 * Fixed a bug introduced in Beta12 where a learn-address
   script might segfault on the delete method.
 * Added Crypto API support in Windows version via
   the --cryptoapicert option (Peter 'Luna' Runestig).
 
 2004.10.18 -- Version 2.0-beta13
 
 * Fixed an issue introduced in Beta12 where the private
   key password would not be prompted for unless --askpass
   was explicitly specified in the config.
 
 2004.10.17 -- Version 2.0-beta12
 
 * Added support for username/password-based authentication.
   Clients can now authentication themselves with the server
   using either a certificate, a username/password, or both.
   New directives: --auth-user-pass, --auth-user-pass-verify,
   --client-cert-not-required, and --username-as-common-name.
 * Added NTLM proxy patch (William Preston).
 * Added --ifconfig-pool-linear server flag to allocate
   individual tun addresses for clients rather than /30
   subnets (won't work with Windows clients).
 * Modified --http-proxy code to cache username/password
   across restarts.
 * Modified --http-proxy code to read username/password
   from the console when the auth file is given as "stdin".
 * Modified --askpass to take an optional filename argument.
 * --persist-tun and --persist-key now work in client mode
   and can be pushed to clients as well.
 * Added --ifconfig-pool-persist directive, to maintain
   ifconfig-pool info in a file which is persistent across
   daemon instantiations.
 * --user and --group privilege downgrades as well as
   --chroot now also work in client mode (the
   dowgrade/chroot will be delayed until the initialization
   sequence is completed).
 * Added --show-engines standalone directive to show
   available OpenSSL crypto accelerator engine support.
 * --engine directive now accepts an optional engine-ID
   parameter to control which engine is used.
 * "Connection reset, restarting" log message now shows
   which client is being reset.
 * Added --dhcp-pre-release directive in Windows version.
 * Second parm to --ip-win32 can be "default", e.g.
   --ip-win32 dynamic default 60.
 * Fixed documentation bug regarding environmental
   variable settings for --ifconfig-pool IP addresses.
   The correct environmental variable names are:
   ifconfig_pool_local_ip and ifconfig_pool_remote_ip.
 * ifconfig_pool_local_ip and ifconfig_pool_remote_ip
   environmental variables are now passed to the
   client-disconnect script.
 * In server mode, environmental variables are now scoped
   according to the client they are associated with,
   to solve the problem of "crosstalk" between different
   client's environmental variable sets.
 * Added --down-pre flag to cause --down script to be
   called before TUN/TAP close (rather than after).
 * Added --tls-exit flag which will cause OpenVPN
   to exit on any TLS errors.
 * Don't push a route to a client if it exactly
   matches an iroute (this lets you push routes to
   all clients, and OpenVPN will automatically remove
   the route from the route push list only for that client
   which the route actually belongs to).
 * Made '--resolv-retry infinite' the default.
   --resolv-retry can be disabled by using a parameter of 0.
 * For clients which plan to pull config info from server,
   set an initial default ping-restart of 60 seconds.
 * Optimized mute code to lessen the load on the processor
   when messages are being muted at a higher frequency.
 * Made route log messages non-mutable.
 * Silence the Linux "No buffer space available" message.
 * Added miscellaneous additional option sanity checks.
 * Added Windows version of easy-rsa scripts in
   easy-rsa/Windows directory (Andrew J. Richardson).
 * Added NetBSD route patch (Ed Ravin).
 * Added OpenBSD patch for TAP + --redirect-gateway
   (Waldemar Brodkorb).
 * Directives which prompt for a username and/or password
   will now work with --daemon (OpenVPN will prompt
   before forking).
 * Warn if CRL is from a different issuer than the
   issuer of the peer certificate (Bernhard Weisshuhn).
 * Changed init script chkconfig parameters to start
   OpenVPN daemon(s) before NFS.
 * Bug fix attempt of "too many I/O wait events" which occurs
   on OSes which prefer select() over poll() such as Mac OS X.
 * Added --ccd-exclusive flag.  This flag will require, as a
   condition of authentication, that a connecting client has
   a --client-config-dir file.
 * TAP-Win32 open code will attempt to open a free adapter
   if --dev-node is not specified (Mathias Sundman).
 * Resequenced --nice and --chroot ordering so that --nice
   occurs first.
 * Added --suppress-timestamps flag (Charles Duffy).
 * Source code changes to allow compilation by MSVC
   (Peter 'Luna' Runestig).
 * Added experimental --fast-io flag which optimizes
   TUN/TAP/UDP writes on non-Windows systems.
 	
 2004.08.18 -- Version 2.0-beta11
 
 * Added --server, --server-bridge, --client, and
   --keepalive helper directives.  See client.conf
   and server.conf in sample-config-files for sample
   configurations which use the new directives.
 * On Windows, added --route-method to control
   whether IP Helper API or route.exe is used
   to add/delete routes.
 * On Windows, added a second parameter to
   --route-delay to control the maximum time period
   to wait for the TAP-Win32 adapter to come up
   before adding routes.
 * Fixed bug in Windows version where configurations
   which omit --ifconfig might fail to recognize when
   the TAP adapter is up.
 * Proxy connection failures will now retry according
   to the --connect-retry parameter. 
 * Fixed --dev null handling on Windows so that TLS
   loopback test described in INSTALL file works
   correctly on Windows.
 * Added "Initialization Sequence Completed" message
   after all initialization steps have been completed
   and the VPN can be considered "up".
 * Better sanity-checking on --ifconfig-pool parameters.
 * Added --tcp-queue-limit option to control
   TUN/TAP -> TCP socket overflow.
 * --ifconfig-nowarn flag will now silence general
   warnings about possible --ifconfig address
   conflicts, including the warning about --ifconfig
   and --remote addresses being in same /24 subnet.
 * Fixed case where server mode did not correctly
   identify certain types of ethernet multicast packets
   (Marcel de Kogel).
 * Added --explicit-exit-notify option (experimental).
 
 2004.08.02 -- Version 2.0-beta10
 
 * Fixed possible reference after free of option strings
   after a restart, bug was introduced in beta8.
 * Fixed segfault at route.c:919 in the beta9
   Windows version that was being caused by indirection
   through a NULL pointer.
 * Mistakenly built debug version of TAP-Win32 driver
   for beta9.  Beta10 has correct release build.
 
 2004.07.30 -- Version 2.0-beta9
 
 * Fixed --route issue on Windows that was introduced with
   the new beta8 route implementation based on the
   IP Helper API.
 
 2004.07.27 -- Version 2.0-beta8
 
 * Added TCP support in server mode.
 * Added PKCS #12 support (Mathias Sundman).
 * Added patch to make revoke-crt and make-crl work
   seamlessly within the easy-rsa environment (Jan Kiszka).
 * Modified --mode server ethernet bridge code to forward
   special IEEE 802.1d MAC Groups, i.e. 01:80:C2:XX:XX:XX.
 * Added --dhcp-renew and --dhcp-release flags to Windows
   version.  Normally DHCP renewal and release on the TAP
   adapter occurs automatically under Windows, however
   if you set the TAP-Win32 adapter Media Status property
   to "Always Connected", you may need these flags.
 * Added --show-net standalone flag to Windows version to
   show OpenVPN's view of the system adapter and routing
   tables.
 * Added --show-net-up flag to Windows version to output
   the system routing table and network adapter list to
   the log file after the TAP-Win32 adapter has been brought
   up and any routes have been added.
 * Modified Windows version to add routes using the IP Helper
   API rather than by calling route.exe.
 * Fixed bug where --route-up script was not being called
   if no --route options were specified.
 * Added --mute-replay-warnings to suppress packet replay
   warnings.  This is a common false alarm on WiFi nets.
 * Added "def1" flag to --redirect-gateway option to override
   the default gateway by using 0.0.0.0/1 and 128.0.0.0/1
   rather than 0.0.0.0/0.  This has the benefit of overriding
   but not wiping out the original default gateway.
   (Thanks to Jim Carter for pointing out this idea).
 * You can now run OpenVPN with a single config file argument.
   For example, you can now say "openvpn config.conf"
   rather than "openvpn --config config.conf".
 * On Windows, made --route and --route-delay more adaptive
   with respect to waiting for interfaces referenced by the
   route destination to come up.  Routes added by --route
   should now be added as soon as the interface comes up,
   rather than after an obligatory 10 second delay.  The
   way this works internally is that --route-delay now
   defaults to 0 on Windows.  Previous versions would
   wait for --route-delay seconds then add the routes.
   This version will wait --route-delay seconds and then
   test the routing table at one second intervals for the
   next 30 seconds and will not add the routes until they
   can be added without errors.
 * On Windows, don't setsockopt SO_SNDBUF or SO_RCVBUF by
   default on TCP/UDP socket in light of reports that this
   action can have undesirable global side effects on the
   MTU settings of other adapters.  These parameters can
   still be set, but you need to explicitly specify
   --sndbuf and/or --rcvbuf.
 * Added --max-clients option to limit the maximum number
   of simultaneously connected clients in server mode.
 * Added error message to illuminate shell escape gotcha when
   single backslashes are used in Windows path names.
 * Added optional netmask parm to --ifconfig-pool.
 * Fixed bug where http-proxy connect retry attempts were
   incorrectly going to the remote OpenVPN server,
   not to the HTTP proxy server.
 
 2004.06.29 -- Version 2.0-beta7
 
 * Fixed bug in link_socket_verify_incoming_addr() which
   under certain circumstances could have caused --float
   behavior even if --float was not specified.
 * --tls-auth option now works with --mode server.
   All clients and the server should use the same
   --tls-auth key when operating in client/server mode.
 * Added --engine option to make use of OpenSSL-supported
   crypto acceleration hardware.
 * Fixed some high verbosity print format size issues
   in event.c for 64 bit platforms (Janne Johansson).
 * Made failure to open --log or --log-append file
   a non-fatal error.
 
 2004.06.23 -- Version 2.0-beta6
 
 * Fixed Windows installer to intelligently put
   up a reboot dialog only if tapinstall tells
   us that it's really necessary.
 * Fixed "Assertion failed at fragment.c:309"
   bug when --mode server and --fragment are used
   together.
 * Ignore HUP, USR1, and USR2 signals during
   initialization.  Prior versions would abort.
 * Fixed bug on OS X: "Assertion failed at event.c:406".
 * Added --service option to Windows version, for use
   when OpenVPN is being programmatically instantiated
   by another process (see man page for info).
 * --log and --log-append options now work on Windows.
 * Update OpenBSD INSTALL notes (Janne Johansson).
 * Enable multicast on tun interface when running on
   OpenBSD (Pavlin Radoslavov).
 * Fixed recent --test-crypto breakage, where options
   such as --cipher were not being parsed correctly.
 * Modified options compatibility string by removing
   ifconfig substring if it is empty.  Incremented
   options compatibility string version number to 4.
 * Fixed typo in --tls-timeout option parsing
   (Mikael Lonnroth).
 
 2004.06.13 -- Version 2.0-beta5
 
 * Fixed rare --mode server crash that could occur
   if data was being routed to a client at
   high bandwidth at the precise moment that the
   client instance object on the server was being
   deleted.
 * Fixed issue on machines which have epoll.h and
   the epoll_create glibc call defined, but which
   don't actually implement epoll in the kernel.
   OpenVPN will now gracefully fall back to the
   poll API in this case.
 * Fixed Windows bug which would cause the following
   error in a --mode server --dev tap configuration:
   "resource limit WSA_MAXIMUM_WAIT_EVENTS has been
   exceeded".
 * Added CRL (certificate revocation list) management
   scripts to easy-rsa directory (Jon Bendtsen).
 * Do a better job of getting the ifconfig component
   of the options consistency check to work correctly
   when --up-delay is used.
 * De-inlined some functions which were too complex
   to be inlined anyway with gcc.
 * If a --dhcp-option option is pushed to a non-windows
   client, the option will be saved in the client's
   environment before the --up script is called, under
   the name "foreign_option_{n}".
 * Added --learn-address script (see man page) which
   allows for firewall access through the VPN to be
   controlled based on the client common name.
 * In mode --server mode, when a client connects to
   the server, the server will disconnect any
   still-active clients which use the same common
   name.  Use --duplicate-cn flag to revert to
   previous behavior of allowing multiple clients
   to concurrently connect with the same common name.
 
 2004.06.08 -- Version 2.0-beta4
 
 * Fixed issue with beta3 where Win32 service wrapper
   was keying off of old TAP HWID as a dependency.  To
   ensure that the new service wrapper is correctly
   installed, the Windows install script will uninstall
   the old wrapper before installing the new one,
   causing a reset of service properties.
 * Fixed permissions issue on --status output file,
   with default access permissions of owner read/write
   only (default permissions can be changed of course with
   chmod).
 
 2004.06.05 -- Version 2.0-beta3
 
 * More changes to TAP-Win32 driver's INF file which
   affects the placement of the driver in the Windows
   device namespace.  This is done to work around an
   apparent bug in Windows when short HWIDs are used,
   and will also ease the upgrade from 1.x to 2.0 by
   reducing the chances that a reboot will be needed
   on upgrade.  Like beta2, this upgrade will
   delete existing TAP-Win32 interfaces, and reinstall
   a single new interface with default properties.
 * Major rewrite of I/O event wait layer in the style
   of libevent.  This is a precursor to TCP support
   in --mode server.
 * New feature: --status.  Outputs a SIGUSR2-like
   status summary to a given file, updated once
   per n seconds.  The status file is comma delimited
   for easy machine parsing.
 * --ifconfig-pool now remembers common names and
   will try to assign a consistent IP to a given
   common name.  Still to do: persist --ifconfig-pool
   memory across restarts by saving state in file.
 * Fixed bug in event timer queue which could cause
   recurring timer events such as --ping to not
   correctly schedule again after firing.  This in
   turn would cause spurrious ping restarts and possible
   connection outages.  Thanks to Denis Vlasenko for
   tracking this down.
 * Possible fix to reported bug where --daemon argument
   was not printing to syslog correctly after restart.
 * Fixed bug where pulling --route or --dhcp-option
   directives from a server would problematically
   interact with --persist-tun on the client.
 * Updated contrib/multilevel-init.patch (Farkas Levente).
 * Added RPM build option to .spec and .spec.in files
   to optionally disable LZO inclusion (Ian Pilcher).
 * The latest MingW runtime and headers define
   'ssize_t', so a patch is needed (Gisle Vanem).
 
 2004.05.14 -- Version 2.0-beta2
 
 * Fixed signal handling bug in --mode server, where
   SIGHUP and SIGUSR1 were treated as SIGTERM.
 * Changed the TAP-Win32 HWID from "TAP" to "TAPDEV".
   Apparently the larger string may work around
   a problem where the TAP adapter is sometimes missing
   from the network connections panel, especially under
   XP SP2. Also note that installing this upgrade will
   uninstall any pre-existing TAP-Win32 adapters, and then
   install a single new adapter, meaning that old adapter
   properties will be lost.  Thanks to Md5Chap for solving
   this one.
 * For --mode server --dev tap, the options --ifconfig and
   --ifconfig-pool are now optional.  This allows address
   assignment via DHCP or use of a TAP VPN without
   IP support, as has always been possible with 1.x.
 * Fixed bug where --ifconfig may not work correctly on
   Linux 2.2.
 * Added 'local' flag to --redirect-gateway for use on
   networks where both OpenVPN daemons are connected
   to a shared subnet, such as wireless.
 
 2004.05.09 -- Version 2.0-beta1
 
 * Unchanged from test29 except for version number
   upgrade.
 
 2004.05.08 -- Version 2.0-test29
 
 * Modified --dev-node on Windows to accept a TAP-Win32
   GUID name.  In addition, --show-adapters will now
   display the high-level name and GUID of each adapter.
   This is an attempt to work around an issue in Windows
   where sometimes the TAP-Win32 adapter installs correctly
   but has no icon in the network connections control
   panel.  In such cases, being able to specify
   --dev-node {TAP-GUID} can work around the missing icon.
 
 2004.05.07 -- Version 2.0-test28
 
 * Fixed bug which could cause segfault on program
   shutdown if --route and --persist-tun are used
   together.
 
 2004.05.06 -- Version 2.0-test27
 
 * Fixed bug in close_instance() which might cause
   memory to be accessed after it had already been freed.
 * Fixed bug in verify_callback() that might have
   caused uninitialized data to be referenced.
 * --iroute now allows full CIDR subnet routing.
 * In "--mode server --dev tun" usage, source addresses
   on VPN packets coming from a particular client must
   be associated with that client in the OpenVPN internal
   routing table.
 	
 2004.04.28 -- Version 2.0-test26
 
 * Optimized broadcast path in multi-client mode.
 * Added socket buffer size options --rcvbuf & --sndbuf.
 * Configure Linux tun/tap driver to use a more sensible
   txqueuelen default.  Also allow explicit setting
   via --txqueuelen option (Harald Roelle).
 * The --remote option now allows the port number
   to be specified as the second parameter.  If
   unspecified, the port number defaults to the
   --rport value.
 * Multiple --remote options on the client can now be
   specified for load balancing and failover.  The
   --remote-random flag can be used to initially randomize
   the --remote list for basic load balancing.
 * If a remote DNS name resolves to multiple DNS addresses,
   one will be chosen by random as a kind of basic
   load-balancing feature if --remote-random is used.
 * Added --connect-freq option to control maximum
   new connection frequency in multi-client mode.
 * In multi-client mode, all syslog messages associated
   with a specific client now include a client-ID prefix.
 * For Windows, use a gettimeofday() function based
   on QueryPerformanceCounter (Derek Burdick).
 * Fixed bug in interaction between --key-method 2
   and DES ciphers, where dynamic keys would be generated
   with bad parity and then be rejected.
 
 2004.04.17 -- Version 2.0-test24
 
 * Reworked multi-client broadcast handling.
 
 2004.04.13 -- Version 2.0-test23
 	
 * Fixed bug in --dev tun --client-to-client routing.
 * Fixed a potential deadlock in --pull.
 * Fixed a problem with select() usage which could
   cause a repeating sequence of "select : Invalid
   argument (code=22)"
 
 2004.04.11 -- Version 2.0-test22
 
 * Fixed bug where --mode server + --daemon was
   prematurely closing syslog connection.
 * Added support for --redirect-gateway on Mac OS X
   (Jeremy Apple).
 * Minor changes to TAP-Win32 driver based on feedback
   from the NDISTest tool.
 	
 2004.04.11 -- Version 2.0-test21
 
 * Optimizations in multi-client server event loop.
 
 2004.04.10 -- Version 2.0-test20
 
 * --mode server capability now works with either tun
   or tap interfaces.  When used with tap interfaces,
   OpenVPN will internally bridge all client tap
   interfaces with the server tap interface.
 * Connecting clients can now have a client-specific
   configuration on the server, based on the client
   common name embedded in the client certificate.
   See --client-config-dir and --client-connect.
   These options can be used to configure client-specific
   routes.
 * Added an option --client-to-client that enables
   internal client-to-client routing or bridging.
   Otherwise, clients will only "see" the server,
   not other connected clients.
 * Fixed bug in route scheduling which would have caused
   --mode server to not work on Windows in test18
   and test19 with the sample config file.
 * Man page is up to date with all new options.
 * OpenVPN 2.0 release notes on web site updated
   with tap-style tunnel examples.
 
 2004.04.02 -- Version 2.0-test19
 
 * Fixed bug where routes pushed from server were
   not working correctly on Windows clients.
 * Added Mac OS X route patch (Jeremy Apple).
 
 2004.03.30 -- Version 2.0-test18
 
 * Minor fixes + Windows self-install modified
   to use OpenSSL 0.9.7d.
 
 2004.03.29 -- Version 2.0-test17
 
 * Fixed some bugs related to instance timeout and deletion.
 * Extended --push/--pull option to support additional
   option classes.
 
 2004.03.28 -- Version 2.0-test16
 
 * Successful test of --mode udp-server, --push,
   --pull, and --ifconfig-pool with server on
   Linux 2.4 and clients on Linux and Windows.
 
 2004.03.25 -- Version 2.0-test15
 	
 * Implemented hash-table lookup of client instances
   based either on remote UDP address/port or remote
   ifconfig endpoint.
 * Implemented a randomized binary tree based
   scheduler for scalably scheduling a large number
   of client instance events.  Uses the treap
   data structure and node rotation algorithm
   to keep the tree balanced.
 * Initial implementation of ifconfig-pool.
 * Made --key-method 2 the default.
 
 2004.03.20 -- Version 2.0-test14
 
 * Implemented --push and --pull.
 
 2004.03.20 -- Version 2.0-test13
 
 * Reduced struct tls_multi and --single-session
   memory footprint.
 * Modified --single-session flag to be used
   in multi-client UDP server client instances.
 
 2004.03.19 -- Version 2.0-test12
 
 * Added the key multi-client UDP server options,
   --mode, --push, --pull, and --ifconfig-pool.
 * Revamped GC (garbage collection) code to not rely
   on any global data.
 * Modifications to thread.[ch] to allow a more
   flexible thread model.
 
 2004.03.16 -- Version 2.0-test11
 
 * Moved all timer code to interval.h, added new file
   interval.c.
 * Fixed missing include.
 
 2004.03.16 -- Version 2.0-test10
 
 * More TAP-Win32 fixes.
 * Initial debugging and testing of multi.[ch].
 
 2004.03.14 -- Version 2.0-test9
 
 * Branch merge with 1.6-rc3
 * More point-to-multipoint work in multi.[ch].
 * Major TAP-Win32 driver restructuring to use
   NdisMRegisterDevice instead of
   IoCreateDevice/IoCreateSymbolicLink.
 * Changed TAP-Win32 symbolic links to use \DosDevices\Global\
   pathname prefix.
 * In the majority of cases, TAP-Win32 should now be
   able to install and uninstall on Win2K without requiring
   a reboot.
 * TAP-Win32 MAC address can now be explicitly set in the
   adapter advanced properties page.
 
 2004.03.04 -- Version 2.0-test8
 
 * Branch merge with 1.6-rc2.
 
 2004.03.03 -- Version 2.0-test7
 
 * Branch merge with 1.6-rc1.2.
 
 2004.03.02 -- Version 2.0-test6
 
 * Branch merge with 1.6-rc1.
 
 2004.03.02 -- Version 2.0-test5
 
 * Move Socks5 UDP header append/remove to socks.c, and is
   called from forward.c.
 * Moved verify statics from ssl.c into struct tls_session.
 * Wrote multi.[ch] to handle top level of point-to-multipoint
   mode.
 * Wrote some code to allow a struct link_socket in a child context
   to be slaved to the parent context.
 * Broke up packet read and process functions in forward.c
   (from socket or tuntap) into separate functions for read
   and process, so that point-to-point and point-to-multipoint can
   share the same code.
 * Expand TLS control channel to allow the passing of configuration
   commands.
 * Wrote mroute.[ch] to handle internal packet routing for
   point-to-multipoint mode.
 
 2004.02.22 -- Version 2.0-test3
 
 * Initial work on UDP multi-client server.
 * Branch merge of 1.6-beta7
 	
 2004.02.14 -- Version 2.0-test2
 
 * Refactorization of openvpn.c into openvpn.[ch]
   init.[ch] forward.[ch] forward-inline.h
   occ.[ch] occ-inline.h  ping.[ch] ping-inline.h
   sig.[ch].  Created a master per-tunnel
   struct context in openvpn.h.
 * Branch merge of 1.6-beta6.2
 
 2003.11.06 -- Version 2.0-test1
 
 * Initial testbed for 2.0.
 
 2004.05.09 -- Version 1.6.0
 	
 * Unchanged from 1.6-rc4 except for version number
   upgrade.
 
 2004.04.01 -- Version 1.6-rc4
 
 * Made minor customizations to devcon and
   renamed as tapinstall.exe for Windows version.
 * Fixed "storage size of `iv' isn't known" build
   problem on FreeBSD.
 * OpenSSL 0.9.7d bundled with Windows self-install.
 	
 2004.03.13 -- Version 1.6-rc3
 
 * Minor Windows fixes for --ip-win32 dynamic, relating to
   the way the TAP-Win32 driver responds to a DHCP request
   from the Windows DHCP client.
 * The net_gateway environmental variable wasn't being
   set correctly for called scripts (Paul Zuber).
 * Added code to determine the default gateway on FreeBSD,
   allowing the --redirect-gateway option to work
   (Juan Rodriguez Hervella).
 	
 2004.03.04 -- Version 1.6-rc2
 
 * Fixed bug in Windows version where the NetBIOS node-type
   DHCP option might have been passed even if it was not
   specified.
 * Fixed bug in Windows version introduced in 1.6-rc1, where
   DHCP timeout would be set to 0 seconds if --ifconfig option
   was used and --ip-win32 option was not explicitly specified.
 * Added some new --dhcp-option types for Windows version.
 
 2004.03.02 -- Version 1.6-rc1
 
 * For Windows, make "--ip-win32 dynamic" the default.
 * For Windows, make "--route-delay 10" the default
   unless --ip-win32 dynamic is not used or --route-delay
   is explicitly specified.
 * L_TLS mutex could have been left in a locked state
   for certain kinds of TLS errors.
 	
 2004.02.22 -- Version 1.6-beta7
 	
 * Allow scheduling priority increase (--nice) together
   with UID/GID downgrade (--user/--group).
 * Code that causes SIGUSR1 restart on TLS errors in TCP
   mode was not activated in pthread builds.
 * Save the certificate serial number in an environmental
   variable called tls_serial_{n} prior to calling the
   --tls-verify script.  n is the current cert chain level.
 * Added NetBSD IPv6 tunnel capability (also requires
   a kernel patch) (Horst Laschinsky).
 * Fixed bug in checking the return value of the nice()
   function (Ian Pilcher).
 * Bug fix in new FreeBSD IPv6 over TUN code which was
   originally added in 1.6-beta5 (Nathanael Rensen).
 * More Socks5 fixes -- extended the struct frame
   infrastructure to accomodate proxy-based encapsulation
   overhead.
 * Added --dhcp-option to Windows version for setting
   adapter properties such as WINS & DNS servers.
 * Use a default route-delay of 5 seconds when
   --ip-win32 dynamic is specified (only applicable when
   --route-delay is not explicitly specified).
 * Added "log_append" registry variable to control
   whether the OpenVPN service wrapper on Windows
   opens log files in append (log_append="1") or
   truncate (log_append="0") mode.  The default
   is truncate.
 
 2004.02.05 -- Version 1.6-beta6
 
 * UDP over Socks5 fix to accomodate Socks5 encapsulation
   overhead (Christof Meerwald).
 * Minor --ip-win32 dynamic tweaks (use long lease time,
   invalidate existing lease with DHCPNAK).
 
 2004.02.01 -- Version 1.6-beta5
 
 * Added Socks5 proxy support (Christof Meerwald).
 * IPv6 tun support for FreeBSD (Thomas Glanzmann).
 * Special TAP-Win32 debug mode for Windows self-install that was
   enabled in beta4 is now turned off.
 * Added some new Solaris notes to INSTALL (Koen Maris).
 * More work on --ip-win32 dynamic.
 
 2004.01.27 -- Version 1.6-beta4
 
 * For this beta, the Windows self-install is a debug version
   and will run slower -- use only for testing.
 * Reverted the --ip-win32 default back to 'ipapi'
   from 'dynamic'.
 * Added the offset parameter to '--ip-win32 dynamic' which
   can be used to control the address of the masqueraded
   DHCP server which replies to Windows DHCP requests.
 * Added a wait/nowait option to --inetd (nowait can only
   be used with TCP sockets, TLS authentication, and over
   a bridged configuration -- see FAQ for more info)
   (Stefan `Sec` Zehl).
 * Added a build-time capability where TAP-Win32 driver
   debug messages can be output by OpenVPN at --verb 6
   or higher.
 
 2004.01.20 -- Version 1.6-beta2
 
 * Added ./configure --enable-iproute2 flag which
   uses iproute2 instead of route + ifconfig --
   this is necessary for the LEAF Linux distro
   (Martin Hejl).
 * Added renewal-time and rebind-time to set of
   DHCP options returned by the TAP-Win32 driver when
   "--ip-win32 dynamic" is used.
 	
 2004.01.14 -- Version 1.6-beta1
 
 * Fixed --proxy bug that sometimes caused plaintext
   control info generated by the proxy prior to http
   CONNECT method establishment to be incorrectly
   parsed as OpenVPN data.
 * For Windows version, implemented the
   "--ip-win32 dynamic" method and made it the default.
   This method sets the TAP-Win32 adapter IP address
   and netmask by replying to the kernel's DHCP queries.
   See the man page for more detailed info.
 * Added --connect-retry parameter which controls
   the time interval (in seconds) between connect()
   retries when --proto tcp-client is used.  Previously,
   this value was hardcoded to 5 seconds, and still
   defaults as such.
 * --resolv-retry can now be used with a parameter
   of "infinite" to retry indefinitely.
 * Added SSL_CTX_use_certificate_chain_file() to ssl.c
   for support of multi-level certificate chains
   (Sten Kalenda).
 * Fixed --tls-auth incompatibility with 1.4.x and earlier
   versions of OpenVPN when the passphrase file is an
   OpenVPN static key file (as generated by --genkey).
 * Added shell-escape support in config files using
   the backslash character ("\") so that (for example)
   double quotes can be passed to the shell.
 * Added "contrib" subdirectory on tarball, source zip,
   and CVS containing user-submitted contributions.
 * Added an optional patch to the Redhat init script to
   allow the configuration file directory to be a
   multi-level directory hierarchy (Farkas Levente).
   See contrib/multilevel-init.patch
 * Added some scripts and documentation on using
   Linux "fwmark" iptables rules to enable
   fine-grained routing control over the VPN
   (Sean Reifschneider, <jafo@tummy.com>).
   See contrib/openvpn-fwmarkroute-1.00
 
 2003.11.20 -- Version 1.5.0
 
 * Minor documentation changes.
 
 2003.11.04 -- Version 1.5-beta14
 
 * Fixed build problem with ./configure --disable-ssl
   that was reported on Debian woody.
 * Fixed bug where --redirect-gateway could not be used
   together with --resolv-retry.
 
 2003.11.03 -- Version 1.5-beta13
 
 * Added CRL (certificate revocation list) capability using
   --crl-verify option (Stefano Bracalenti).
 * Added --replay-window option for variable replay-protection
   window sizes.
 * Fixed --fragment bug which might have caused certain large
   packets to be sent unfragmented.
 * Modified --secret and --tls-auth to permit different cipher and
   HMAC keys to be used for each data flow direction.  Also
   increased static key file size generated by --genkey from
   1024 to 2048 bits, where 512 bits each are reserved for
   send-HMAC, encrypt, receive-HMAC, and decrypt.  Key file forward
   and backward compatibility is maintained.  See --secret option
   documentation on the man page for more info.
 * Added --tls-remote option (Teemu Kiviniemi).
 * Fixed --tls-cipher documention regarding correct delimiter
   usage (Teemu Kiviniemi).
 * Added --key-method option for selecting alternative data
   channel key negotiation methods.  Method 1 is the default.
   Method 2 has been added (see man page for more info).
 * Added French translation of HOWTO to web site
   (Guillaume Lehmann).
 * Fixed problem caused by late resolver library load on
   certain platforms when --resolv-retry and --chroot are
   used together (Teemu Kiviniemi).
 * In TCP mode, all decryption or TLS errors will abort the current
   connection (this is not done in UDP mode because UDP is
   "connectionless").
 * Fixed a TCP client reconnect bug that only occurs on the
   BSDs, where connect() fails with an invalid argument.  This
   bug was partially (but not completely) fixed in beta7.
 * Added "route_net_gateway" environmental variable which contains
   the pre-existing default gateway address from the routing table
   (there's no standard API for getting the default gateway, so
   right now this feature only works on Windows or Linux).
 * Renamed the "route_default_gateway" enviromental variable to
   "route_vpn_gateway" -- this is the remote VPN endpoint.
 * The special keywords vpn_gateway, net_gateway, and remote_host
   can now be used for the network or gateway components of the
   --route option.  See the man page for more info.
 * Added the --redirect-gateway option to configure the VPN
   as the default gateway (implemented on Linux and Windows only).
 * Added the --http-proxy option with basic authentication
   support for use in TCP client mode.  Successfully tested
   using Squid as the HTTP proxy, with and without authentication.
 
 2003.10.12 -- Version 1.5-beta12
 
 * Fixed Linux-only bug in --mktun and --rmtun which was
   introduced around beta8 or so, which would cause
   an error such as "I don't recognize device tun0 as a
   tun or tap device1".
 * Added --ifconfig-nowarn option to disable options
   consistency warnings about --ifconfig parameters.
 * Don't allow any kind of sequence number backtracking or
   message reordering when in TCP mode.
 * Changed beta naming convention to use '_' (underscore)
   rather than '-' (dash) to pacify rpmbuild.
 	
 2003.10.08 -- Version 1.5-beta11
 
 * Modified code in the Windows version which sets the IP address
   and netmask of the TAP-Win32 adapter using the IP Helper API.
   Most of the changes involve better error recovery when
   the IP Helper API returns an error status.  See the
   manual page entry on --ip-win32 for more info.
 
 2003.10.08 -- Version 1.5-beta10
 
 * Added getpass() function for Windows version so that --askpass
   option works correctly (Stefano Bracalenti).
 * Added reboot advisory to end of Win32 install script.
 * Changed crypto code to use pseudo-random IVs rather than
   carrying forward the IV state from the previous packet.
   This is in response to item 2 in the following document:
   http://www.openssl.org/~bodo/tls-cbc.txt which points
   out weaknesses in TLS's use of the same IV carryforward
   approach.  This change does not break protocol compatibility
   with previous versions of OpenVPN.
 * Made a change to the crypto replay protection code to also
   protect against certain kinds of packet reordering attacks.
   This change does not break protocol compatibility with
   previous versions of OpenVPN.
 * Added --ip-win32 option to provide several choices for
   setting the IP address on the TAP-Win32 adapter.
 * #ifdefed out non-CBC crypto modes by default.
 * Added --up-delay option to delay TUN/TAP open and --up script
   execution until after connection establishment.  This option
   replaces the earlier windows-only option --tap-delay.
   
 2003.10.01 -- Version 1.5-beta9
 
 * Fixed --route-noexec bug where option was not parsed correctly.
 * Complain if --dev tun is specified without --ifconfig on Windows.
 * Fixed bug where TCP connections on windows would sometimes cause
   an assertion failure.
 * Added a new flag to TAP-Win32 advanced properties that allows one
   to set the adapter to be always "connected" even when an OpenVPN
   process doesn't have it open.  The default behavior is to report
   a media status of connected only when an OpenVPN process has the
   adapter open.
 * Rebuilt the Windows self-install distribution with OpenSSL 0.9.7c
   DLLs in response to an OpenSSL security advisory.
 
 2003.09.30 -- Version 1.5-beta8
 
 * Extended the --ifconfig option to work on tap devices as well
   as tun devices.
 * Implemented the --ifconfig option for Windows, by calling the
   netsh tool.
 * By default, do an "arp -d *" on Windows after TAP-Win32 open to
   refresh the MAC cache.  This behaviour can be disabled with
   --no-arp-del.
 * On Windows, allow the --dev-node parameter (which specifies
   the name of the TAP-Win32 adapter) to be omitted in cases where
   there is a single TAP-Win32 adapter on the system which can be
   assumed to be the default.
 * Modified the diagnostic --verb 5 debugging level to print 'R'
   for TCP/UDP read, 'W' for TCP/UDP write, 'r' for TUN/TAP read,
   and 'w' for TUN/TAP write.
 * Conditionalize OpenBSD read_tun and write_tun based on tun or tap
   mode.
 * Added IPv6 tun support to OpenBSD (Thomas Glanzmann).
 * Make the --enable-mtu-dynamic ./configure option enabled by
   default.
 * Deprecated the --mtu-dynamic run-time option, in favor of
   --fragment.
 * DNS names can now be used as --ifconfig parameters.
 * Significant work on TAP-Win32 driver to bring up to SMP standards.
 * On Windows, fixed dangling IRP problem if TAP-Win32 driver is
   unloaded or disabled, while a user-space process has it open.
 * On Windows, if --tun-mtu is not specified, it will be read from
   the TAP-Win32 driver via ioctl.
 * On Windows, added TAP-Win32 driver status info to "F2" keyboard
   signal (only when run from a console window).
 * Added --mssfix option to control TCP MSS size (YANO Hirokuni).
 * Renamed --mtu-dynamic option to --fragment to more accurately
   reflect its function.  Fragment accepts a single parameter which
   is the upper limit on acceptable UDP packet size.
 * Changed default --tun-mtu-extra parameter to 32 from 64.
 * Eliminated reference to malloc.o in configure.ac.
 * Added tun device emulation to the TAP-Win32 driver.
 * Added --route and related options.
 * Added init script for SuSE Linux (Frank Plohmann).
 * Extended option consistency check between peers to function
   in all crypto modes, including static-key and cleartext modes.
   Previously only TLS mode was supported.  Disable with
   --disable-occ.
 * Overall, increased the amount of configuration option sanity
   checking, especially of networking parameters.
 * Added --mtu-test option for empirical MTU measurement.
 * Added Windows-only option --tap-delay to not set the TAP-Win32
   adapter media state to 'connected' until TCP/UDP connection
   establishment with peer.
 * Slightly modified --route/--route-delay semantics so that when
   --route is given without --route-delay, routes are added
   immediately after tun/tap device open.  When --route-delay is
   specified, routes will be added n seconds after connection
   initiation, where n is the --route-delay parameter (which
   can be set to 0).	
 * Made TCP framing error into a non-fatal error that triggers a
   connection reset.
 
 2003.08.28 -- Version 1.5-beta7
 
 * Fixed bug that caused OpenVPN not to respond to exit/restart
   signals when --resolv-retry is used and a local or remote DNS
   name cannot be resolved.
 * Exported a series of environmental variables with useful
   info for scripts.  See man page for more info.  Based
   on a suggestion by Anthony Ciaravalo.
 * Moved TCP/UDP socket bind to a point in the initialization
   before the --up script gets called.  This is desirable
   because (a) a socket bind failure will happen before
   daemonization, allowing an error status code to be returned
   to the shell and (b) the possibility is eliminated of a
   socket bind failure causing the --up script to be run
   but not the --down script.  This change has a side effect
   that --resolv-retry will no longer work with --local.
 * Fixed bug where if an OpenVPN TCP server went down and back
   up again, Solaris or FreeBSD clients would fail to reconnect
   to it.
 * Fixed bug that prevented OpenVPN from being run by
   inetd/xinetd in TCP mode.
 * Added --log and --log-append options for logging messages to
   a file.
 * On Windows, check that the current user is a member of the
   Administrator group before attempting install or uninstall.
 
 2003.08.16 -- Version 1.5-beta6
 
 * Fixed TAP-Win32 driver to properly increment the Rx/Tx count.
 
 2003.08.14 -- Version 1.5-beta5
 
 * Added user-configurability of the TAP-Win32 adapter MTU
   through the adapter advanced properties page.
 * Added Windows Service support.
 * On Windows, added file association and right-clickability
   for .ovpn files (OpenVPN config files).
 
 2003.08.05 -- Version 1.5-beta4
 
 * Extra refinements and error checking added to Windows
   NSIS install script.
 	
 2003.08.05 -- Version 1.5-beta3
 	
 * Added md5.h include to crypto.c to fix build problem on
   OpenBSD.
 * Created a Win32 installer using NSIS.
 * Removed DelService command from TAP-Win32 INF file.  It appears
   to be not necessary and it interfered with the ability to
   uninstall and reinstall the driver without needing to reboot.
 * On Windows version, added "addtap" and "deltapall" batch
   files to add and delete TAP-Win32 adapter instances.
 
 2003.07.31 -- Version 1.5-beta2
 	
 * Renamed INSTALL.w32 to INSTALL-win32.txt and reformatted
   in Windows ASCII so it's easier to click and view.
 * Added postscript and PDF versions of the HOWTO to the web
   site (C R Zamana).
 * Merged Michael Clarke's stability patch into TAP-Win32
   driver which appears to fix the suspend/resume driver bug
   and significantly improve driver stability.
 * Added Christof Meerwald's Media Status patch to the
   TAP-Win32 driver which shows the TAP adapter to be
   disconnected when OpenVPN is not running.
 * Moved socket connect and TCP server listen code to a later
   point in openvpn() function so that the TCP server listen
   state is entered after daemonization.
 * Added keyboard shortcuts to simulate signals in the Windows
   version, see the window title bar for descriptions.
 
 2003.07.24 -- Version 1.5-beta1
 	
 * Added TCP support via the new --proto option.
 * Renamed udp-centric options such as --udp-mtu to
   --link-mtu (old option names preserved for compatibility).
 * Ported to Windows 2000 + XP using mingw and a TAP driver
   derived from the Cipe-Win32 project by Damion K. Wilson.
 * Added --show-adapters flag for windows version.
 * Reworked the SSL/TLS packet acknowledge code to better
   handle certain corner cases.
 * Turned off the default enabling of IP forwarding in the
   sample-scripts/openvpn.init script for Redhat.
   Forwarding can be enabled by users in their --up scripts
   or firewall config.
 * Added --up-restart option based on suggestion from Sean
   Reifschneider.
 * If --dev tap or --dev-type tap is specified, --tun-mtu
   defaults to 1500 and --tun-mtu-extra defaults to 64.
 * Enabled --verb 5 debugging mode that prints 'R' and 'W'
   for each packet read or write on the TCP/UDP socket.
 
 2003.08.04 -- Version 1.4.3
 
 * Added md5.h include to crypto.c
   to fix build problem on OpenBSD.
 
 2003.07.15 -- Version 1.4.2
 
 * Removed adaptive bandwidth from
   --mtu-dynamic -- its absence appears
   to work better than its existence (1.4.1.2).
 * Minor changes to --shaper to fix long
   retransmit timeouts at low bandwidth
   (1.4.1.2).
 * Added LOG_RW flag to openvpn.h for
   debugging (1.4.1.2).
 * Silenced spurious configure warnings (1.4.1.2).
 * Backed out --dev-name patch, modified --dev
   to offer equivalent functionality (1.4.1.4).
 * Added an optional parameter to --daemon and
   --inetd to support the passing of a custom
   program name to the system logger (1.4.1.5).
 * Add compiled-in options to the program title
   (1.4.1.5).
 * Coded the beginnings of a WIN32 port (1.4.1.5).
 * Succeeded in porting to Win32 Mingw environment
   and running loopback tests (1.4.1.6).  Still
   need a kernel driver for full Win32
   functionality.
 * Fixed a bug in error.h where
   HAVE_CPP_VARARG_MACRO_GCC was misspelled.
   This would have caused a significant slowdown
   of OpenVPN when built by compilers that
   lack ISO C99 vararg macros (1.4.1.6).
 * Created an init script for Gentoo Linux
   in ./gentoo directory (1.4.1.6).
 
 2003.05.15 -- Version 1.4.1
 
 * Modified the Linux 2.4 TUN/TAP open code to
   fall back to the 2.2 TUN/TAP interface if the
   open or ioctl fails.
 * Fixed bug when --verb is set to 0 and non-fatal
   socket errors occur, causing 100% CPU utilization.
   Occurs on platorms where
   EXTENDED_SOCKET_ERROR_CAPABILITY is defined,
   such as Linux 2.4.
 * Fixed typo in tun.c that was preventing
   OpenBSD build.
 * Added --enable-mtu-dynamic configure option
   to enable --mtu-dynamic experimental option.
 	
 2003.05.07 -- Version 1.4.0
 
 * Added --replay-persist feature to allow replay
   protection across sessions.
 * Fixed bug where --ifconfig could not be used
   with --tun-mtu.
 * Added --tun-mtu-extra parameter to deal with
   the situation where a read on a TUN/TAP device
   returns more data than the device's MTU size.
 * Fixed bug where some IPv6 support code for
   Linux was not being properly ifdefed out for
   Linux 2.2, causing compile errors.
 * Added OPENVPN_EXIT_STATUS_x codes to
   openvpn.h to control which status value
   openvpn returns to its caller (such as
   a shell or inetd/xinetd) for various conditions.
 * Added OPENVPN_DEBUG_COMMAND_LINE flag to
   openvpn.h to allow debugging in situations
   where stdout, stderr, and syslog cannot be used
   for message output, such as when OpenVPN is
   instantiated by inetd/xinetd.
 * Removed owner-execute permission from file
   created by static key generator (Herbert Xu
   and Alberto Gonzalez Iniesta).
 * Added --passtos option to allow IPv4 TOS bits
   to be passed from TUN/TAP input packets to
   the outgoing UDP socket (Craig Knox).
 * Added code to prevent open socket file descriptors
   from being accessible to called scripts.
 * Added --dev-name option (Christian Lademann).
 * Added --mtu-disc option for manual control
   over MTU options.
 * Show OS MTU value on UDP socket write failures
   (linux only).
 * Numerous build system and portability
   fixes (Matthias Andree).
 * Added better sensing of compiler support for
   variable argument macros, including (a) gcc
   style, (b) ISO C 1999 style, and (c) no support.
 * Removed generated files from CVS.  Note INSTALL
   file for new CVS build commands.
 * Changed certain internal symbol names
   for C standards compliance.
 * Added TUN/TAP open code to cycle dynamically
   through unit numbers until it finds a free
   unit (based on code from Thomas Gielfeldt
   and VTun).
 * Added dynamic MTU and fragmenting infrastructure
   (Experimental).  Rebuild with FRAGMENT_ENABLE
   defined to enable.
 * Minor changes to SSL/TLS negotiation, use
   exponential backoff on retransmits, and use
   a smaller MTU size (note that no protocol
   changes have been made which would break
   compatibility with 1.3.x).
 * Added --enable-strict-options flag
   to ./configure.  This option will cause
   a more strict check for options compatibility
   between peers when SSL/TLS negotiation is used,
   but should only be used when both OpenVPN peers
   are of the same version.
 * Reorganization of debugging levels.
 * Added a workaround in configure.ac for
   default SSL header location on Linux
   to fix RH9 build problem.
 * Fixed potential deadlock when pthread support
   is used on OSes that allocate a small socketpair()
   message buffer.
 * Fixed openvpn.init to be sh compliant
   (Bishop Clark).
 * Changed --daemon to wait until all
   initialization is finished before becoming a
   daemon, for the benefit of initialization
   scripts that want a useful return status from
   the openvpn command.
 * Made openvpn.init script more robust, including
   positive indication of initialization errors
   in the openvpn daemon and better sanity checks.
 * Changed --chroot to wait until initialization
   is finished before calling chroot(), and allow
   the use of --user and --group with --chroot.
 * When syslog logging is enabled (--daemon or
   --inetd), set stdin/stdout/stderr to point
   to /dev/null.
 * For inetd instantiations, dup socket descriptor
   to a >2 value.
 * Fixed bug in verify-cn script, where test would
   incorrectly fail if CN=x was the last component
   of the X509 composite string (Anonymous).
 * Added Markus F.X.J. Oberhumer's special
   license exception to COPYING.
 
 2002.10.23 -- Version 1.3.2
 
 * Added SSL_CTX_set_client_CA_list call
   to follow the canonical form for TLS initialization
   recommended by the OpenSSL docs.  This change allows
   better support for intermediate CAs and has no impact
   on security.
 * Added build-inter script to easy-rsa package, to
   facilitate the generation of intermediate CAs.
 * Ported to NetBSD (Dimitri Goldin).
 * Fixed minor bug in easy-rsa/sign-req.  It refers to
   openssl.cnf file, instead of $KEY_CONFIG, like all
   other scripts (Ernesto Baschny).
 * Added --days 3650 to the root CA generation command
   in the HOWTO to override the woefully small 30 day
   default (Dominik 'Aeneas' Schnitzer).
 * Fixed bug where --ping-restart would sometimes
   not re-resolve remote DNS hostname.
 * Added --tun-ipv6 option and related infrastructure
   support for IPv6 over tun.
 * Added IPv6 over tun support for Linux (Aaron Sethman).
 * Added FreeBSD 4.1.1+ TUN/TAP driver notes to
   INSTALL (Matthias Andree).
 * Added inetd/xinetd support (--inetd) including
   documentation in the HOWTO.
 * Added "Important Note on the use of commercial certificate
   authorities (CAs) with OpenVPN" to HOWTO based on
   issues raised on the openvpn-users list.
 
 2002.07.10 -- Version 1.3.1
 
 * Fixed bug in openvpn.spec and openvpn.init
   which caused RPM upgrade to fail.
 
 2002.07.10 -- Version 1.3.0
 
 * Added --dev-node option to allow explicit selection of
   tun/tap device node.
 * Removed mlockall call from child thread, as it doesn't
   appear to be necessary (child thread inherits mlockall
   state from parent).
 * Added --ping-timer-rem which causes timer for --ping-exit
   and --ping-restart not to run unless we have a remote IP
   address.
 * Added condrestart to openvpn.init and openvpn.spec
   (Bishop Clark).
 * Added --ifconfig case for FreeBSD (Matthias Andree).
 * Call openlog with facility=LOG_DAEMON (Matthias Andree).
 * Changed LOG_INFO messages to LOG_NOTICE.
 * Added warning when key files are group/others accessible.
 * Added --single-session flag for TLS mode.
 * Fixed bug where --writepid would segfault if used with
   an invalid filename.
 * Fixed bug where --ipchange status message was formatted
   incorrectly.
 * Print more concise error message when system() call
   fails.
 * Added --disable-occ option.
 * Added --local, --remote, and --ifconfig options sanity
   check.
 * Changed default UDP MTU to 1300 and TUN/TAP MTU to
   1300.
 * Successfully tested with OpenSSL 0.9.7 Beta 2.
 * Broke out debug level definitions to errlevel.h
 * Minor documentation and web site changes.
 * All changes maintain protocol compatibility
   with OpenVPN versions since 1.1.0, however default
   MTU changes will require setting the MTU explicitly
   by command line option, if you want 1.3.0 to
   communicate with previous versions.
 
 2002.06.12 -- Version 1.2.1
 
 * Added --ping-restart option to restart
   connection on ping timeout using SIGUSR1
   logic (Matthias Andree).
 * Added --persist-tun, --persist-key,
   --persist-local-ip, and --persist-remote-ip
   options for finer-grained control over SIGUSR1
   and --ping-restart restarts.  To
   replicate previous SIGUSR1 functionality,
   use --persist-remote-ip.
 * Changed residual IV fetching code to take
   IV from tail of ciphertext.
 * Added check to make sure that CFB or OFB
   cipher modes are only used with SSL/TLS
   authentication mode, and added a caveat
   to INSTALL.
 * Changed signal handling during initialization
   (including re-initialization during restarts)
   to exit on SIGTERM or SIGINT and ignore other
   signals which would ordinarily be caught.
 * Added --resolv-retry option to allow
   retries on hostname resolution.
 * Expanded the --float option to also
   allow dynamic changes in source port number
   on incoming datagrams.
 * Added --mute option to limit repetitive
   logging of similar message types.
 * Added --group option to downgrade GID
   after initialization.
 * Try to set ifconfig path automatically
   in configure.
 * Added --ifconfig code for Mac OS X
   (Christoph Pfisterer).
 * Moved "Peer Connection Initiated" message
   to --verb level 1.
 * Successfully tested with
   OpenSSL 0.9.7 Beta 1 and AES cipher.
 * Added RPM notes to INSTALL.
 * Added ACX_PTHREAD (from the autoconf
   macro archive) to configure.ac
   to figure out the right pthread
   options for a given platform.
 * Broke out macro definitions from
   configure.ac to acinclude.m4.
 * Minor changes to docs and HOWTO.
 * All changes maintain protocol compatibility
   with OpenVPN versions since 1.1.0.
 
 2002.05.22 -- Version 1.2.0
 
 * Added configuration file support via
   the --config option.
 * Added pthread support to improve latency.
   With pthread support, OpenVPN
   will offload CPU-intensive tasks such as RSA
   key number crunching to a background thread
   to improve tunnel packet forwarding
   latency.  pthread support can be enabled
   with the --enable-pthread configure option.
   Pthread support is currently available
   only for Linux and Solaris.
 * Added --dev-type option so that tun/tap
   device names don't need to begin with
   "tun" or "tap".
 * Added --writepid option to write main
   process ID to a file.
 * Numerous portability fixes to ease
   porting to other OSes including changing
   all network types to uint8_t and uint32_t,
   and not assuming that time_t is 32 bits.
 * Backported to OpenSSL 0.9.5.
 * Ported to Solaris.
 * Finished OpenBSD port except for
   pthread support.
 * Added initialization script:
   sample-scripts/openvpn.init
   (Douglas Keller)
 * Ported to Mac OS X (Christoph Pfisterer).
 * Improved resilience to DoS attacks when
   TLS mode is used without --remote or
   --tls-auth, or when --float is used
   with --remote.  Note however that the best
   defense against DoS attacks in TLS mode
   is to use --tls-auth.
 * Eliminated automake/autoconf dependency
   for non-developers.
 * Ported configure.in to configure.ac
   and autoconf 2.50+.
 * SIGHUP signal now causes OpenVPN to restart
   and re-read command line and or config file,
   in conformance with canonical daemon behaviour.
 * SIGUSR1 now does what SIGHUP did in
   version 1.1.1 and earlier -- close and reopen
   the UDP socket for use when DHCP changes
   host's IP address and preserve most recently
   authenticated peer address without rereading
   config file.
 * SIGUSR2 added -- outputs current statistics,
   including compression statistics.
 * All changes maintain protocol compatibility
   with 1.1.1 and 1.1.0.
 
 2002.04.22 -- Version 1.1.1
 	
 * Added --ifconfig option to automatically configure
   TUN device.
 * Added inactivity disconnect (--inactive
   and --ping-exit options).
 * Added --ping option to keep stateful firewalls
   from timing out.
 * Added sanity check to command line parser to
   err if any TLS options are used in non-TLS mode.
 * Fixed build problem with compiler environments that
   define printf as a macro.
 * Fixed build problem on linux systems that have
   an integrated TUN/TAP driver but lack the persistent
   tunnel feature (TUNSETPERSIST).  Some linux kernels
   >= 2.4.0 and < 2.4.7 fall into this category.
 * Changed all calls to EVP_CipherInit to use explicit
   encrypt/decrypt mode in order to fix problem with
   IDEA-CBC and AES-256-CBC ciphers.
 * Minor changes to control channel transmit limiter
   algorithm to fix problem where TLS control channel
   might not renegotiate within the default 60 second window.
 * Simplified man page examples by taking advantage
   of the new --ifconfig option.
 * Minor changes to configure.in to check more
   rigourously for OpenSSL 0.9.6 or greater.
 * Put back openvpn.spec, eliminated
   openvpn.spec.in.
 * Modified openvpn.spec to reflect new automake-based
   build environment (Bishop Clark).
 * Other documentation changes.
 * Added --test-crypto option for debugging.
 * Added "missing" and "mkinstalldirs" automake
   support files.
 
 
 2002.04.09 -- Version 1.1.0
 
 * Strengthened replay protection and IV handling,
   extending it fully to both static key and
   TLS dynamic key exchange modes.
 * Added --mlock option to disable paging and ensure that key
   material and tunnel data is never paged to disk.
 * Added optional traffic shaping feature to cap the maximum
   data rate of the tunnel.
 * Converted to automake (The Platypus Brothers 2002-04-01).
 * Ported to OpenBSD by Janne Johansson.
 * Added --tun-af-inet option to work around an incompatibility
   between Linux and BSD tun drivers.
 * Sequence number-based replay protection using the
   IPSec sliding window model is now the default,
   disable with --no-replay.
 * Explicit IV is now the default, disable with --no-iv.
 * Disabled all cipher modes except CBC, CFB, and OFB.
 * In CBC mode, use explicit IV and carry forward residuals,
   using IPSec model.
 * In CFB/OFB mode, IV is timestamp, sequence number.
 * Eliminated --packet-id, --timestamp, and max-delta parameter to
   the --tls-auth option as they are now supplanted by improved
   replay code which is enabled by default.
 * Eliminated --rand-iv as it is now obsolete with improved
   IV code.
 * Eliminated --reneg-err option as it increases vulnerability
   to DoS attacks.
 * Added weak key check for DES ciphers.
 * --tls-freq option is no longer specified on the command line,
   instead it now inherits its parameter from the
   --tls-timeout option.
 * Fixed bug that would try to free memory on exit that was
   never malloced if --comp-lzo was not specified.
 * Errata fixed in the man page examples: "test-ca" should be
   "tmp-ca".
 * Updated manual page.
 * Preliminary work in porting to OpenSSL 0.9.7.
 * Changed license to allowing linking with OpenSSL.
 
 2002.03.29 -- Version 1.0.3
 
 * Fixed a problem in configure with library ordering on the
   command line.
 
 2002.03.28 -- Version 1.0.2
 
 * Improved the efficiency of the inner event loop.
 * Fixed a minor bug with timeout handling.
 * Improved the build system to build on RH 6.2 through 7.2.
 * Added an openvpn.spec file for RPM builders (Bishop Clark).
 
 2002.03.23 -- Version 1.0
 
 * Added TLS-based authentication and key exchange.
 * Added gremlin mode to stress test.
 * Wrote man page.
 
 2001.12.26 -- Version 0.91
 
 * Added any choice of cipher or HMAC digest.
 
 2001.5.13 -- Version 0.90
 
 * Initial release.
 * IP tunnel over UDP, with blowfish cipher and SHA1 HMAC signature.