I'm still unable to join channels on the server unless it connects completely. All firewalls are disabled (both on my computer and on the router/modem). What doesn't seem to make sense, based on everything I've read, is this: when I disable forwarding port 113 to my IP address on the Linksys setup, it shows up as being in Stealth mode on the aforementioned website (^) and as Closed when it is being forwarded (enabled). I tried randomly connecting to the server list on mIRC; I was able to make successful connections on about 30-40% of them, but the rest (including each of the ones I actually want to connect to!) aren't working.

Any other suggestions?