The NAT patch does work, at least for me logging into my server. I opened the ports up on the firewall, so others should be able to try it also (though it would have always worked for everyone on the outside). The server name is "theCoder test" and it mentions the NAT patch.
Basically, all it does is bind the daemons to a specific interface instead of INADDR_ANY. This apparently causes Linux to send response packets back through that interface so it picks up the correct from IP address. The world server picks up the IP address from the worldaddress line in LoginServer.ini (the ini parser is buggy, so remove the account= and password= lines from the file to get it to work). The zone server uses the address passed in on the command line. Both servers use gethostbyname, so the address can either be the actual external IP, or a name that resolves to the IP. Note that it has to be the external IP (the one that eqemu.org sees), not the internal one.
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