Xbox 360 only connects to internet/live briefly

Xbox 360. I've read a ton of posts, done troubleshooting several times, contacted xbox already plus my provider, and still can't connect to internet. When I first startup it works briefly but then disconnects and network tests fail at internet (error Nat
type) or succeed with limited functions (error icmp) plus one error code 8C150009 that apparently doesn't exist...

I've been trying for almost a month now to get stable connection, have reset xbox/modem network and system settings, tried on another xbox, changed wifi channel, authorised the mac address, even upgraded my plan to a 25 download speed. The only way I can
connect is with a mobile hotspot that has an even slower speed. I don't understand why it won't let me online. It was working well before I got a new home wifi connection and added my profile... And yes I have tried removing it and adding again.. I've pretty
much tried it all, hoping for a new idea plz.

When I try live chat support the page just keeps refreshing. So here I am.. Thanks in advance

:)

 

MacBook Pro WiFi HotSpot for XBOX live

I am in a dorm and have already been briefly suspended from the wireless internet here for using a router to game. I was wondering if there is any way that I could use a MacBook Pro to create a wireless hotspot to connect to xbox live with my 360.

 

Xbox 360 Internet connectivity Problem

I am trying to connect my xbox 360 to xbox live. Before I install the new update, the xbox internet works fine. But, after the update my xbox either does not connect to the internet or it says that the xbox 360 will connect to the internet but, xbox live
won't connect properly or something like that. I can only connect to the internet by using my laptop to share the connection. So does anyone have any idea to fix this? Thanks.