IPTables, IRC, and SSH

[Troy Telford <troyt@myrealbox.com>]

 I have every ruleset for my firewall set how I want it... except for 
IRC and ssh...

I would like to use the state-tracking for IRC, but simply having the  
--state established,related (and new... but I don't think that's 
necessary)  --sport irc(d) options doesn't seem to do anything...

I can connect TO the IRC server, but it won't allow a login.  I've read 
that it has something to do with ICMP, but I don't know exactly what, 
nor how to fix it.

Second - SSH - I would like iptables to accept incoming connections to 
OpenSSH, but from a specific domain  (myschool.edu).  However, I don't 
know the IP range for the domain, nor do I know how to set IPtables to 
allow connections from only that domain.  For that matter, I have only 
been able to have incoming SSH connections when iptables allows ALL 
incoming connections.  So what commands do I need to use for SSH?  
(Again, with state tracking would be preferred).

Thanks,

Troy