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    pfSense blocking all DNS

    Scheduled Pinned Locked Moved Firewalling
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    • D Offline
      DouggaDit
      last edited by DouggaDit

      This seems absurdly basic, but my firewall is hobbling my network by blocking all DNS.

      Firewall rules are setup for all relevant interfaces (the first rules)
      d4126b06-74d4-4467-badb-0b36c961fa00-image.png

      But the firewall is blocking all DNS on all interfaces using the default deny rule
      270d17f1-3364-484c-9df0-d896f2df2468-image.png

      I can't figure out what's going on.
      Any help would be appreciated.

      D S 4 Replies Last reply Reply Quote 0
      • D Offline
        DouggaDit @DouggaDit
        last edited by DouggaDit

        This was not the solution.

        Navigate to System > Advanced > System Tunables.
        Find these two settings and adjust their values:
            net.link.bridge.pfil_member: Set its value to 0 to disable filtering on member interfaces.
            net.link.bridge.pfil_bridge: Set its value to 1 to enable filtering on the bridge interface itself.
        
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        • D Offline
          DouggaDit @DouggaDit
          last edited by

          NSlookup on the server succeeds instantly.
          It fails at clients.

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          • D Offline
            DouggaDit @DouggaDit
            last edited by DouggaDit

            I found a problem experimenting with rules on the bridged interface.
            It seems the HOMEBRIDGE_subnets network alias does not work when creating rules. Applying rules to this appears to have no effect.

            Use any/* does work.
            I'm new to pfSense, but this looks like a bug.

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            • D Offline
              DouggaDit @DouggaDit
              last edited by DouggaDit

              Something else.
              The logs are showing an entry from the LAN interface which is a member of the HomeBridge bridged interface. Is this normal? Shouldn't the log show the traffic coming from the Bridge not the LAN interface?

              Firewall Log showing entries for both LAN & HomeBridge interfaces.
              c4f681c2-75d9-4b16-a7d9-5d7e84c912a7-image.png

              Bridge Definition
              3661012c-0384-458c-b83d-1404190aef4a-image.png

              The IP address is assigned on the Bridge Config page.

              Also, I have IPv6 turned off. Why are these logs showing this traffic?

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              • D Offline
                DouggaDit @DouggaDit
                last edited by DouggaDit

                The firewall is simply unstable.
                Integrated network aliases don't function.
                The firewall simply doesn't work.
                Rules to allow all on specific ports appear to be the only type of rule that work consistently. Attempting to narrow the 'allow' to specific ip addresses or networks fail. User defined and system defined interface-related aliases don't function.

                This forum is not a good use of my time.
                I assume the silence is simply bait to get people to switch to paid support.

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                • S Offline
                  SteveITS Rebel Alliance @DouggaDit
                  last edited by

                  @DouggaDit allow UDP in addition to TCP

                  Only install packages for your version, or risk breaking it. Select your branch in System/Update/Update Settings.
                  When upgrading, allow 10-15 minutes to reboot, or more depending on packages, and device or disk speed.
                  Upvote 👍 helpful posts!

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                  • D Offline
                    DouggaDit @DouggaDit
                    last edited by

                    Nice catch.
                    Thanks!

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