Unable to play multiplayer.

Do I have to have a fireteam to play mutiplayer? It says I don’t have the suitable servers for all members of my fireteam. I don’t have a fireteam and prefer to play by myself. I just don’t understand why it’s doing this to me.

When having an open NAT and a solid connection and being hard wired into my modem, I can now no longer connect to the Halo matchmaking servers. If I use wireless off of a router in my house I can get a connection, but it results in lag. I have no issues with Gears of War, or any other matchmaking. I have called my ISP, and Xbox multiple times. I didn’t have this issue at launch or during November, why now? I get a red triangle at the matchmaking screen saying I can’t connect. I have Comcast internet.

I just wish 343 would look at this. It’s -Yoink-. Iv been a long time fan. Sense the first game. 343 has released nothing but brokenot games now