Linux firewall

[Basic204]

I wanted to know can you make a firewall on any linux or do you have to use only certain ones and can i do this in backtrack ?

[DaKahuna]

depending on the version of linux you are running, take a look at ipchains or iptables.

[gromeo]

http://www.pfsense.org/

[purehate]

Backtrack actually has a firewall included in it which is called rc.fire wall and is not enabled by default. Its far from optimized but its a good start. Its based of iptables.

pfsense (what gromeo is talking about) is actually a freebsd distribution which is built as a firewall. In order for it to be effective you need a stand alone box to run it on.