While troubleshooting a bandwidth issue for a customer today I noticed a lot of TCP traffic between different hosts of the customer on tcp port 7680. As the customer has multiple locations with diverse bandwidths available this started to hog up quite some bandwidth. After some research I found out that tcp port 7680 is used by Windows 10 to distribute windows updates to other domain clients.
The following will disable this behaviour on Windows 10 according to a post I found on spiceworks.
Disable via Group Policy Object (GPO)
- Open Group Policy Management either on a domain controller or via RSAT.
- Create and link a new policy
- Computer Configuration > Policies > Administrative Templates > Windows Components > Delivery Optimization > Download Mode
- Change from Not Configured to Enabled
- Change Download Mode: to None
- If you're creating this policy from your server, you will need to apply the policy update by entering gpupdate /force at a run line. This is not required if you are creating via RSAT. Then, run the same gpupdate command again on each client - or just reboot each client.