XBOX ONE Port Numbers

Here you can find the list for all standard ports on xbox. Specific games may need somethig more, but usually this is enough:

https://support.microsoft.com/en-us/help/4026770/xbox-open-these-network-ports-for-xbox-one

i remember port forwarding my xbox one with the specific numbers to input but didnt know there was specific numbers for party chat ?

Hey, this page has the list of ports and types. Hope it helps! https://beta.support.xbox.com/help/Hardware-Network/connect-network/network-ports-used-xbox-live

I have found 2 different articles about port forwarding and Xbox 360. One is the Xbox 360 have ports forwarded for just Xbox 360, and another to have ports forwarded for the game specific (i.e.Modern Warfare 2). Is there such a thing as having too many ports
forwarded? The value range with the above mentioned articles overlap on some of the port numbers.

No one can actually connect to your xbox.

Its just rogue traffic. Some games are p2p and not everyones xbox uses port 3074 due to UPnP.

Mine sometimes connects using a port number in a high range especially if i previously used my 360.

This would probably show up on someone elses router log as an ip adress from the uk using a high range port number.