Okay, so my building is setup with its own switches and what not, (ethernet ports in the wall), so, If i understand correctly there are three layers of networking, my local network (my stuff connected to my router), my building network, and the internet.

So here's the deal, I used to use a switch to connect my PC(Ubuntu 9.10), my Server(Ubuntu (9.10 Server Edition)), and my wifi devices (Phone...).

Others in my building used to be able to connect to my server directly through the buildings networking, since I set up this router that has no longer been so simple, I flashed DD-WRT onto the router and set my server up with Static DHCP as well as my PC. I have set the server's IP up as DMZ, so now, using my router ip/hostname forwards to my server, so that works fine, just under the routers hostname rather than the servers (I'm okay with that). So now my problem is that I cannot "see" or join my friends Halo LAN games (which we play through the buildings networking -- before the router I could connect to them without a problem). I went into DD-WRT and setup port forwarding for ports 60, 2302, 2303 which are supposed to be what Halo uses (those ports forward to my PC's local IP), but I still do not see the LAN Game.

-Does my defined port forwarding override DMZ?
-I'm kind of unsure where the problem is considering how weird my Internet access works out, how might I get this working?

Thanks,
MJ

Try http://portforward.com/.