Continuously awful networking/router problems

I'm been trying to figure this out for several days now. We recently purchased a new modem (Motorola SURFboard SB1621) and a wireless router (Belkin N300 F9K1002V5) and nothing I do seems to work for any extended period of time.

Yes, I went through and forwarded the necessary ports (53, 80, 88, 1863, 3074; TCP & UDP for each) to my new static IP that I set up with the PortForward software. I followed all of those directions perfectly. The problem is that my 360 works just fine for
awhile and then it will randomly kick me offline, allow me to sign back in, but then I have very limited connectivity (i.e. can't connect to parties, have trouble accepting invites, can't download and play new missions in GTA 5). After this, I can't really
do anything to fix it aside from trying something that another site tells me to do and then that works until this cycle starts over again.

I'm so tired of routers not working with my 360 ever. Someone please point out what I can do to make this better. I feel like there might be something I'm missing because routers can't just be this inherently awful and difficult with a 360.

:)

 

Continuously awful network/router issues...

I have Cox and it's always been like this. However, each time I've used Cox internet in my lifetime, I was also using a router so that may actually be the reason I always thought Cox was horrible.

Anyways, I turned off my router's firewall and everything went swimmingly for the rest of the night. I had no issues whatsoever and everything played like normal. Hopefully this was the cause of the problem.

 

Continuously awful network/router issues...

Who is your ISP? I know a lot of people have had problems with Talk Talk and suffering disconnects etc. With them you have to ask for fast gamer.