IRC server recommendations?

[list at jonepet.net]

> Hello all,
>
> We have a dedicated server that is running FreeBSD 4.8.
>
> We need to run an IRC server off of it. File sharing needs to be turned
> off. Nicknames and rooms should able to be registered.
You can use EFNet/dalnet's ircd, check in /usr/ports/irc or packages/irc.
if you dont need nick-registrations ircu will probaly work better, you can
install GNUWorld with web-interface and get "Undernet's X".
(http://coder-com.undernet.org)

> In addition, how do I set up a subdomain pointing to it? (For example,
> irc.ourdomain.com).
If you host the domain yourself(DNS) and using BIND you can add to zone-file:
irc IN A your.ip.address
or
irc IN CNAME your.hostname.
If you dont host it yourself, you need to do it where you have registered
the domain. Most have a web-interface to do it.