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    DNS Resolver Needs a restart each time WAN IP changes

    Scheduled Pinned Locked Moved DHCP and DNS
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    • J
      JohnKap
      last edited by

      My ISP at random times decides to issue a new DHCP address to the WAN interface, and as a result, my DNS resolver needs a restart to start working again.

      Troubleshooting:

      • when I do a DNS Lookup from the diagnostics menu, all requests return successfully
      • when I do an nslookup from a device, times out. The device can ping the firewall, and any IP address directly on the internet.
      • in the main system log at the time of the WAN IP address change, it appears it is restarting all packages which includes the DNS resolver.

      bdb0928c-0047-4ed2-bc5c-e5af8fc89856-image.png

      • DNS Resolver log file shows a restart around the time of the IP address change, nothing else of interest.

      492c5522-0d51-4317-a2c1-d704892e9c77-image.png

      pfsense v2.6
      pfblockerng v3.0

      any guidance appreciated.

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      • J
        JohnKap
        last edited by

        It's happened again a few times, and a bit more troubleshooting, however still not closer to finding a resolution.

        From the LAN, if I run nmap against the firewall, Ports 443 & 22 are open (https / ssh), however DNS port 53 is closed. Restarting the resolver and a subsequent nmap all is good.

        d442f5a8-503f-4643-94f8-c120b3f86823-image.png

        any thoughts?

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