I've been having problems connecting to a certain friend over Xbox Live for the past few weeks, ever since I moved. My networking equipment changed (obviously), so I have been fiddling around with settings on both the DSL modem and the router connected to the modem, but I have not been able to solve my problem yet. I am unable to connect to a party chat with my friend, nor connect to a game lobby with him, but when there is somebody else in the party or lobby, there seems to be no problem. My NAT has bounced between Moderate and Open (currently it is open), while my friend has had an Open NAT setting pretty much the whole time. It seems that there is something else preventing us from connecting to each other when we are the only ones trying to play or chat together.
My networking gear is as follows:
Modem: Comtrend 5071T
Router: Netgear WNDR3400
Currently I have the NAT filtering set to "Open" on the Netgear router (located in the WAN Settings category of the router configuration page), as I originally thought that maybe my connection was experiencing a "Double NAT", even though it had never been listed as a Strict NAT. I currently have DHCP enabled on the router, and I am getting a "local" IP address of 10.0.0.xxx, when the IP addresses distributed from the modem are in the 192.168.1.xxx range. I thought that if I disabled DHCP, maybe it would act as a simple wireless access point, with the modem assigning the "correct" IP addresses, and while I was able to receive a wireless signal from the router still, I was unable to connect to the internet, due to IP address issues and/or DNS issues (the 360's Test Connection function would give me different results just about every other time). After setting all of the hardware back to normal and re-establishing Internet connectivity, I thought that maybe somehow it was a problem on my friend's end.
Here's my friend's networking hardware info:
Modem: Westell 6100
Router: Belkin F6D4230-4 V3
I am unsure of the specifics of his network configuration, but I would assume that his setup is pretty standardized, since he normally doesn't have problems and doesn't have to mess with settings.
Something else of interest, I am connecting wirelessly to my router, while he is wired to his router, but I don't know if that would make a difference.
I have also tried connecting with my friend with other 360s within my home network (I have multiple, roommate has one as well), and we are unable to connect to any parties or lobbies with a friend, BUT we are able to participate in match-making with no problem, AND we seem to be able to join parties or lobbies with friends as long as other people are there too.
I'm about at my wit's end with this networking issue. I'm certainly no expert, but after years of LAN parties and configuring the routers/modems at my old home, I thought I would be able to fix this issue. It's been kind of a drag because usually my friend and I join up and play either Halo 4 or Mass Effect 3 match-making together, but we haven't been able to lately, because of the networking issue.
If anyone has any advice, or suggestions on how to differently configure my home network (I'm all but convinced the networking issue is on my "side" of Xbox Live, not my friend's), please do not hesitate to post! I can also see if my friend will post on this thread if additional info is needed from him.