I have the Pi-Hole acting as the DHCP server and DNS server too and this works fine for 23 hours and then it flops and I don’t understand why.

Basically after 24 hours, all devices just disconnect from the router and when I try and reconnect them, they say they’re unable to get an IP address.

But before they drop connection, they all report the DNS server as the Pi-Hole.

If I change my DHCP to static and connect to my router, I see that the Pi-Hole is still connected with its static IP just fine.

If I factory reset the router and then add the same SSID and password, the Pi-Hole automatically reconnects and then all devices can reconnect again, so I’m unsure what the issue is.

Can someone break this down. I feel stupid for not understanding what’s happening here.

  • @sabreW4K3OP
    1•1 month ago

    if you can see pi-hole from the router, can you connect to it over SSH and see what pings and what it thinks the network looks like?

    I’ve just confirmed that I can’t SSH to it, it says

    ssh: connect to host 192.168.1.100 port 22: No route to host
    • @sabreW4K3OP
      1•1 month ago

      Okay, so after searching left, right and centre, I found something interesting. I have both my 5G and my 2.4G using the same SSID, could that be the cause of the issue?

    • Matt The HorwoodEnglish
      1•1 month ago

      yeah, your PI zero goes to renew its DHCP lease and cant as its lost its IP and so cant see the DHCP server its running.

      I would read up on how to set a debian static IP, that way you know how and your Pi zero will work all the time

        • Matt The HorwoodEnglish
          2•1 month ago

          Your very welcome, I do support a SaaS system for the UK NHS. So I do have a bit of networking skills, that and I self host things both at home and in OVH.

          If you have your pi zero setup with a static ip, you should find things work all day every day now.

          Just remember that every day is a school day, even for experienced sysadmins.

          • @sabreW4K3OP
            1•1 month ago

            It’s either been 24 hours of 17 hours, I can’t quite recall, but it seems to be sticking. Everything is working. Thank you so so so so much. Honestly, I’m smiling like a little kid right now. Thank you so so so much!

            Honestly, with you doing sysadmin for the NHS, I’m more confident to get sick now 😂

            Nah, I can’t thank you enough. You’re a bloody legend. Thank you, thank you and thank you again!