I’m using a Surfshark VPN and want to connect to Surfshark via the Wireguard protocol. I have installed the Wireguard program, downloaded the configuration file from the Surfshark website with the keys generated by Surfshark. However, when i press ‘Activate’ it keeps initiating a handshake but never completes.

Things i have tried:

  • Opening ports on windows firewall
  • Googling
  • Forwarding ports on router
  • Changing settings in the config file

What am i missing?

  • seemebreakthis@lemm.eeEnglish
    1·
    1 year ago

    Just speculating. Can’t test it out for you because I no longer use Surfshark.

    Surfshark insists on using MSS Clamping. In your config file, try adding the following line:

    PostUp = iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS ---clamp-mss-to-pmtu

    I know for a fact that this works for Wireguard running on Linux. But for Windows, I have no clue if the command is the same. If not, try searching for adding MSS Clamping to your Wireguard connection profile.

    • TeeBee@lemmy.worldOPEnglish
      1·
      1 year ago

      Thanks for the reply!

      I tried your suggestion, but it didn’t work. Last week I’ve set up a Linux server that uses a VPN via wireguard and that works fine.