[newbie] firewalls

[chronos]

Hi all,
Well as I get ready to go out to the internet in linux for the first time 
had a question. What firewall is good for linux 7.2 ? I basically want a 
decent one that I can configure to suit my needs. How about Black Ice 
defender ? Will that work with linux ? If not Id like some suggustions. If 
there are free ones that are decent cool. If not money is really not an 
issue as I want my box safe.
                                                                                       
                     Thank 
you, Chronos.