TransConnect is an implementation of function interposing to allow users on *nix platforms to transparenly tunnel all networking applications over an HTTPS proxy. It has been extensively tested with telnet, SSH, fetchmail, IRC, whois, Pine, Netscape, Mozilla, Evolution, etc. over squid proxy.
fCluster is a multi-threaded client/server redundancy application for your Linux firewall solution. fCluster is designed for the production environment with features that include: dynamic firewall synchronization, support for both ipchains and netfilter, user definable polling intervals and fail-over sequence, and email notification of a system failure. It also includes a Perl administration utility that allows you to configure both the server and the client from one machine, and view the status of the local and remote machines.
The IPtables Firewall Webmin Module helps you easily administrate an iptables firewall over a Web interface with the Webmin Look and Feel. It has three modes: Newbie (select between 5 predefined security levels), Template (configure on a per Interface/per Protocol base) and expert (rule iptables as a guru has to).