Getting slower speeds and unstable connection without -lac

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  • February 12, 2024 at 11:50 am #13534
    nitro
    Participant

      Hello, I’ve been using WireSock for about 2 months now, switched off from WireGuard for Windows because a friend showed me that I can have more control of which apps go and don’t go through the VPN.

      Today I just realized I’m getting slower speeds and unstable connection with WireSock, I’ve noticed before but it didn’t bother me too much to check the issue.

      I have 800/400 up/down internet at home, my speedtests also report the same, however the moment I turn on my WireSock client tunnel, it drops down to around 400/400, and it goes up really slowly, sometimes not even fast enough to hit 300.

      As I knew WireSock is supposed to have a better performance than WireGuard client itself, I decided to look on why this was happening, that’s when I tried -lac and the results were:

      800/400 up/down without WireSock

      800/400 up/down with WireSock -lac (Virtual Network Interface)

      400/400 up/down with normal WireSock and takes long to get to 400 stable, like 10 seconds (both above are instantly to 800).

       

      All tests were done in the same server.

       

      What could be causing this?

       

      And last, is there any real difference if I use -lac or not?

      • This topic was modified 9 months, 2 weeks ago by nitro.
      • This topic was modified 9 months, 2 weeks ago by nitro.
      • This topic was modified 9 months, 2 weeks ago by nitro.
      February 12, 2024 at 2:02 pm #13538
      Vadim Smirnov
      Keymaster

        Hello,
        The most notable distinction between WireSock’s virtual adapter mode and its default mode is that the former requires Administrator privileges to configure the virtual network adapter, while the latter does not. Regarding the throughput differences you’ve observed, this is intriguing. In my tests using WireSock in default mode on a 10 Gbps network and iperf3, the speeds reached 5.34 Gbit/sec, compared to 3.66 Gbit/sec for downloads when using the official WireGuard client. Could the MTU settings in your configuration be influencing this? What is the MTU value you are using? Additionally, have you tried reducing the MTU to 1380 to see if it impacts performance?

        February 13, 2024 at 1:52 am #13541
        nitro
        Participant

          I am using default MTU (I don’t specify it on both server and client, searching on Google says 1420 for WireGuard), should I change the server MTU, client MTU or both?

          • This reply was modified 9 months, 2 weeks ago by nitro.
          • This reply was modified 9 months, 2 weeks ago by nitro.
          February 13, 2024 at 8:30 am #13544
          Vadim Smirnov
          Keymaster

            It’s generally advisable to adjust the MTU on both the client and the server. Remember, changing MTU settings is often a process of trial and error, and what’s optimal can vary depending on your specific network conditions.

            February 13, 2024 at 8:26 pm #13545
            nitro
            Participant

              Ok, I just tried MTU 1380 and I got the same results, so I’m assuming this is not because of MTU, and I don’t think it’d be because the virtual adapter setting also uses the same MTU I’m assuming.

              February 20, 2024 at 1:25 pm #13550
              Vadim Smirnov
              Keymaster

                I don’t think it’d be because the virtual adapter setting also uses the same MTU I’m assuming.

                Yes, you are correct, but the MTU is enforced using different techniques in adapter and adapterless modes.

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