'blaze' is a Netfilter iptables firewall script that is meant to be ridiculously easy to use, pretty basic, but powerful enough to handle a box with multiple NICs to support gateway usage, possibly with NAT. Setup should take no more than five minutes. Logging is not currently supported.
iptables-bash_completion provides programmable completion for the iptables and ip6tables programs. iptables options are shown only if they are valid at the current context. It supports completion of options, matches, and targets, and dynamic retrieval of data from the system, including chains, set names, interfaces, and hostnames. Environment variables allow completion options to be tuned. IP and MAC addresses can be supplied using a file.