Hello everyone.

I started my PC for the day and cannot access my LAN and have no internet using the internal NIC on my Asus B550-F motherboard and a separate PCI NIC as well. Booted into a Fedora LiveCD and do have internet on Firefox. The PC was working perfectly last night when I shut it down.

My GL-MT6000 router sees the PC as a wired client and issued its static IP, but I cannot ping the PC from any other computer on the same network.

I’m pretty new to Linux, so I’m not sure what info to supply, but I’m hoping someone can offer a useful suggestion.

Thanks very much!

  • talEnglish
    3·
    1 month ago

    So enp12s0 is your active interface, and the router has probably given you an IP address. The sendmsg permission thing surprises me.

    Might be interesting to try running that ping as root.

    https://askubuntu.com/questions/1187787/ping-returns-operation-not-permitted-cannot-connect-to-broadcast-or-interne

    This page says that some people who use NordVPN apparently experience similar behavior, including the sendmsg permission error and inability to access the network, if they were using NordVPN and take it down. It then intentionally blocks network traffic, I assume to avoid leaking non-VPNed connections out onto the Internet.

    Are you perchance using a VPN?

    • Zonefive@sh.itjust.worksOPEnglish
      4·
      1 month ago

      OMG, a genius you are! I run Mullvad VPN occasionally, but somehow, even though it’s not set to launch on startup, it activated “Lockdown mode” on its own. I fired up the VPN and everything works! Turned off lockdown mode and disconnected the VPN and all is back to normal.

      Thanks you so much for the help!

      • talEnglish
        3·
        1 month ago

        No prob. Glad it’s working!

        • phanto@lemmy.ca
          1·
          1 month ago

          I had a similar issue once with my ProtonVPN client. They fixed the Linux client so it never seems to happen anymore. Glad someone was able to help.