@@ -467,22 +467,25 @@ func (r Rule) WithChain(chain string) Rule {

 	return wc

 }

-// Append appends the rule to the end of the chain. If the rule already exists anywhere in the

+// ensure appends/insert the rule to the end of the chain. If the rule already exists anywhere in the

 // chain, this is a no-op.

-func (r Rule) Append() error {

+func (r Rule) ensure(op Action) error {

 	if r.Exists() {

 		return nil

 	}

-	return r.exec(Append)

+	return r.exec(op)

+}

+

+// Append appends the rule to the end of the chain. If the rule already exists anywhere in the

+// chain, this is a no-op.

+func (r Rule) Append() error {

+	return r.ensure(Append)

 }

 // Insert inserts the rule at the head of the chain. If the rule already exists anywhere in the

 // chain, this is a no-op.

 func (r Rule) Insert() error {

-	if r.Exists() {

-		return nil

-	}

-	return r.exec(Insert)

+	return r.ensure(Insert)

 }

 // Delete deletes the rule from the kernel. If the rule does not exist, this is a no-op.