Attached you find the code for firewall and groups. The only thing
which is missing, is the script, which runs rules.pl as root.
Michael will build it.
You can test it manually. Please feel free to install the files and
setup some groups and rules. If you are ready, go to ipfire console
and run "rules.pl" to see, what rules would be inserted.
Please read the README file which explains the installation process
(it's german).