Alright. Here's the deal. My NAT type has been moderate for quite some time now. I'm pretty knowledgeable about routers and port forwarding and all that jazz. Before giving you my router/modem info, let me tell you everything I've tried to open it up:
Tried opening ports 88, 80, 3074, and 53 (i believe. I opened the right one, I know that), to both UDP and TCP.
uPnP was already enabled. I disabled it, then re-enabled it.
I have reset my router and modem, multiple times.
I have given my Xbox a custom IP, and put in the info manually (Subnet mask, Gateway, etc) in the configure network settings menu on my Xbox. I enabled the port for that specific IP (in my case, 192.168.1.11, compared to my laptop's .50).
I believe bridging mode is enabled, but to be quite honest I can't find it in my settings.
Alright, so here's the info. I have a cisco M10 Valet wireless router (link here) , connected to a Motorola SURFboard, model SBV5222. (link here).
If your suggestion is to get a new router/modem, that's not happening. Is this even fixable?