[SOLVED] Turns out I’m just a bigger moron than I thought. The MAC address of my server had accidentally been flagged in my router for black listing.

As the title says, my proxmox host is apparently not able to reach the internet anymore, not sure for how long this has been an issue, I rarely work on the host itself. It can ping other devices on my network just fine, and other devices can ping it. I can also SSH in to it and access the web interface. My VMs are connected to the internet without any issues. I don’t need to access the host remotely/outside my home network, this is just for updating it etc.

I can’t see the host under active devices in my router though.

I have been trying to figure why, but so far without any luck.

  • tvcvt@lemmy.mlEnglish
    3·
    9 months ago

    This really sounds like a problem with the default route. What’s the output of ip route? That should give us some hints about what’s up.

    • DreadPotato@sopuli.xyzOPEnglish
      11·
      9 months ago

      this is the output of ip route.

      192.168.68.1 is my router, 192.168.68.120 is the proxmox host

      • tvcvt@lemmy.mlEnglish
        1·
        9 months ago

        Cool. That looks right. Have you checked that the bridge is set up properly and that the router doesn’t have anything silly going on for that subnet?

        PVE’s network settings are in /etc/network/interfaces and that’s where you can see how the bridge is set up.

        It might be beneficial to know more about your network. Is this the only subnet or do you have a bunch of VLANs? Can other devices on the subnet ping outbound? Have you looked at the firewall on PVE?

        • DreadPotato@sopuli.xyzOPEnglish
          1·
          9 months ago

          this is the contents of the interfaces file

          I don’t have anythiung seperated in to different VLANs, and i only use this single subnet. all other devices can ping outbound without issues.

      • BearOfaTime@lemm.eeEnglish
        1·
        9 months ago

        Is the host configured with static IP or DHCP? Either way, verify it has the correct DNS config.

        Personally I use static for any device that hosts a service.

        What happens if you ping Yahoo.com from the console in Proxmox? It should show the DNS server IP it’s using for resolution.

        • DreadPotato@sopuli.xyzOPEnglish
          1·
          9 months ago

          It’s set to static, I also do that for anything that hosts something.

          It won’t ping yahoo.com at all, it just reports 100% packet loss.

          Edit: just realised that it won’t ping my gateway/router either. It’s pinging all other devices on my network just fine though.

      • PlexSheep@feddit.deEnglish
        2·
        9 months ago

        Can you dig @9.9.9.9? If so, its certainly DNS. If it’s not DNS, perhaps try to check your iptables iptables -L && iptables -t nat -L.

        • DreadPotato@sopuli.xyzOPEnglish
          11·
          9 months ago

          I’m not really sure what to look for, I’m not very experienced in network, but this is the output i get

          • PlexSheep@feddit.deEnglish
            3·
            9 months ago

            From the output, you don’t have any routing rules for your machine that block outgoing traffic. The dig command confirms that you can talk to servers. 9.9.9.9 is a common DNS Server. Based off of this, it seems like your problem is that your system has a bad DNS configuration (it’s always DNS).

            Can you parhaps cat /etc/resolv.con? This file normally contains the used DNS servers for Linux systems, unless using special software.

              • PlexSheep@feddit.deEnglish
                1·
                9 months ago

                Okay, no external software for DNS management present here. Is that ip a working DNS Server? Is it your server itself perhaps?

                • DreadPotato@sopuli.xyzOPEnglish
                  21·
                  9 months ago

                  192.168.68.210 is my adguard, it’s on a different machine. It should be working, all my other devices use it and I can see the traffic going through it. My servers IP is 192.168.68.120, and I can’t see traffic from that on my adguard at all. But it can ping my adguard.

  • walden@sub.wetshaving.socialEnglish
    1·
    9 months ago

    Does it work after a reboot? I vaguely remember having this problem on my old motherboard. Adding a PCIe LAN adapter and switching everything over solved it for me. Now I have a new mobo and it doesn’t have any network problems.

  • Decronym@lemmy.decronym.xyzBEnglish
    1·
    9 months ago

    Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I’ve seen in this thread:

    Fewer Letters More Letters
    DHCP Dynamic Host Configuration Protocol, automates assignment of IPs when connecting to a network
    DNS Domain Name Service/System
    IP Internet Protocol
    PCIe Peripheral Component Interconnect Express

    [Thread #648 for this sub, first seen 1st Apr 2024, 16:45] [FAQ] [Full list] [Contact] [Source code]

  • Billygoat@catata.fishEnglish
    4·
    9 months ago

    In the UI, go to your host -> system -> network and confirm that you have a default gateway set.

  • nickwitha_k (he/him)@lemmy.sdf.orgEnglish
    0·
    9 months ago

    Try a traceroute to something like 9.9.9.9 and google’s IP. You’re able to resolve things ok. So, not DNS. Need to find out where the traffic is going to die.

    Also, try a curl https://google.com -vvv. This should give some more info on what is happening to TCP traffic.