If you're looking for advice on configuring a firewall script, Oskar Andreasson's tutorial is excellent - go there first.

The rc.firewall.gateway.generic is a good starting point for a gateway/router box.

The rc.firewall.desktop.generic is a good starting point for a box directly connected to the internet.

The sshattacks file shows some example lines (and explanation) for using the recent match to help protect against the common brute force ssh attacks.

[ICO]NameLast modifiedSizeDescription

[PARENTDIR]Parent Directory  -  
[   ]rc.firewall.desktop.generic2011-03-12 07:24 1.2K 
[   ]rc.firewall.gateway.generic2011-01-22 17:06 5.5K 
[   ]sshattacks2008-12-31 05:47 3.3K