Append, Insert and Delete

iptables -t filter -A INPUT ...

The option “-A INPUT” tells the program to add the rule at the end of the“ INPUT” chain. There are also the options “-I chain [rulenum] ” for inserting a rule, “-R chain [rulenum]” for replacing a rule and “-D chain rulenum” for deleting a rule from a chain.

KMyFirewall only uses the -A option in the generated script.