Ok, this is tough to explain. But here it goes..
I have my wireless connection set up so that XBox Live uses an IP address that's in the router's DMZ, making the NAT settings open while keeping the rest of the connections safe. Worked like a charm, until a recent router reset seemed to have triggered a huge problem.
Now, whenever I try to go to the router's settings through its IP, I get a "500 server error" message. I've tried physically resetting the router, the usual stuff. Nothing works. And it's also somehow made it so I can't get online using the IP that was in the DMZ, so now I'm back to having bad NAT settings, making me unable to play with a large amount of friends. Of course, I can't get into the router's settings to fix this because of that error message, so I need an alternate way of handling it.
I've heard there's a way to essentially fix the problem through the Command Prompt, but I can't figure out what command(s) to use for that. Any help would be appreciated. By the way, I'm using Windows 7 on my laptop, and on a Belkin router, in case that helps at all.