Windows Store (UWP) Apps connection issues with Wireguard

[lordcyb3r]

Issue report

Operating system:
Windows 10 pro 19043.1083 Insider Beta channel (issue persisted on public release as well)
App version:
2021.4

Issue description

Microsoft Store fails to connect when attempting to download an app while connected to wireguard.

Openvpn:

• can browse the store
• can sign in
• can download
  wireguard:
• can browse the store
• can sign in (sometimes)
• connection error on download
  • error codes received:
    • Code: 0x800704C6
    • 0x800704cf
      Additional insights:
  • seems to mostly effect installing apps I havent installed before
  • effects the xbox app (workaround is signing in connected to openvpn than switching to wireguard)
  • sometimes blocks windows update

[pinkisemils]

Thanks for the report. Would you mind testing out the vanilla WireGuard client to see if it's an issue with our firewall, or WireGuard/Wintun?

[lordcyb3r]

sure I can do that. just gotta follow the guide so give me a bit

[lordcyb3r]

to add more info to the report above, I was using the chicago servers

[lordcyb3r]

ok yeah it seems to be an issue exclusively with the mullvad app

[lordcyb3r]

please let me know if you need any more testing. I am perfectly fine with quickly building and running a test build if it becomes necessary

[lordcyb3r]

small update:
Issue isnt as bad on windows 11 with the new windows store preview. I will do further testing

[lordcyb3r]

Seems the issue is exclusive to windows 10. So focus on windows 10. Issue seems to have completely disappeared in the windows 11 developer preview