[gentoo-embedded] Using iptables alone without shorewall/firehol

[Sebastian Rodriguez]

Hello,
I am considering the option of using gnap, as my currently router / fw is a 
gentoo box. The "problem" is that actually I don't use shorewall, neither 
firehol. I just start my script at boot, and everything is great. I just 
want to know if we can unable shorewall and firehol and use iptables alone. 
If it is possible, how do we do it?
Thank you very much
-- 
Sébastien Rodriguez