[TriLUG] opening port 6667 on Feisty

[Alan Porter]

> And Alan: I got the same 'blank' results from iptables, so it looks like
> it's not running.
>   

Just a point of clarification, for those who have not messed with Linux 
firewalls...

Iptables is a kernel filter that is built into the TCP/IP stack.  If the 
modules are loaded, then each packet has to run the gauntlet of filters 
in the kernel.  There is no "firewall program" that filters packets.  
The firewall program (be is shorewall or my home-brew script) simply 
sets up the iptables rules and then exits.

This is kind of a weird thing to get used to when you're first testing 
out your firewall.  Shorewall is not running, so you can't kill it.  
"service shorewall stop" does not kill a process, it just issues some 
more iptables rules that'll let more packets pass through.

Now, back to our discussion about getting the IRC server to work...

Alan






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