[NTLUG:Discuss] Iptables config file... where?

[Kenneth Loafman]

This is a really stupid question... where does iptables hide the firewal 
config file/script?  I can run 'iptables -L' and things are configured, 
possibly defaults, but I need to make some additions, and I can't seem 
to find the config file.  Even the man page does not even have a FILES 
section, so why/where are they hiding it?

This one is on a Debian system.

...Thanks,
...Ken