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    Local DNS Records on different subnet

    Scheduled Pinned Locked Moved General pfSense Questions
    87 Posts 5 Posters 6.7k Views
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    • stephenw10S
      stephenw10 Netgate Administrator
      last edited by

      Yes that would allow your laptop to reach the DNS server behind pfSense.

      Though I still advise against this entirely because it will cause problems down the line. ๐Ÿ˜‰

      jhmc93J 2 Replies Last reply Reply Quote 0
      • jhmc93J
        jhmc93 @stephenw10
        last edited by

        @stephenw10 what kind of problems?

        1 Reply Last reply Reply Quote 0
        • jhmc93J
          jhmc93 @stephenw10
          last edited by

          @stephenw10 so I tried it on a test machine, so IP is different, but what have I done wrong??
          Screenshot_3.png

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          • stephenw10S
            stephenw10 Netgate Administrator
            last edited by

            Because it relies on the client being configured to reach it then any changes on the client may break it. And in this circumstance that would mean the client loses DNS. If Windows is updated for example.

            Or if you add some other client you have to remember to add the static route.

            I imagine I could think of at least 10 ways this could bite you. ๐Ÿ˜‰ I have seen many customers with similar setups where things mostly worked until they didn't.

            But for that one device it should work for now.

            jhmc93J 1 Reply Last reply Reply Quote 0
            • jhmc93J
              jhmc93 @stephenw10
              last edited by

              @stephenw10 look up, it hasn't worked unfortunately

              1 Reply Last reply Reply Quote 0
              • stephenw10S
                stephenw10 Netgate Administrator
                last edited by

                Ok so 192.168.0.75 is the pfSense WAN IP address?

                And 70.86.90.0/24 is the pfSense LAN subnet? A public /24 subnet?

                That seems unlikely and you previously showed it as 192.168.11.0/24.

                jhmc93J 1 Reply Last reply Reply Quote 0
                • jhmc93J
                  jhmc93 @stephenw10
                  last edited by

                  @stephenw10 so this is a test machine, not the actual machine that has the ip above, 70.86.90.0/24 is the test machine, 192.168.0.75 is the wan ip address as shown below
                  Screenshot_4.png

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                  • stephenw10S
                    stephenw10 Netgate Administrator
                    last edited by

                    Then yes, that should work as long as firewall rules exist to pass it. And, of course, the target host in the LAN must allow it.

                    Start a continuous ping from the laptop then check the states on that test firewall to see if it's passing. Or the firewall logs to see if it's being blocked.

                    jhmc93J 1 Reply Last reply Reply Quote 0
                    • jhmc93J
                      jhmc93 @stephenw10
                      last edited by

                      @stephenw10 ye it didn't work 4 me

                      jhmc93J 1 Reply Last reply Reply Quote 0
                      • jhmc93J
                        jhmc93 @jhmc93
                        last edited by

                        @jhmc93 wa rulle should i have on firewall

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                        • stephenw10S
                          stephenw10 Netgate Administrator
                          last edited by

                          A rule on WAN to pass traffic from your laptop to the internal host. Or to the full LAN side subnet.

                          I assume it shows blocked traffic in the log then?

                          jhmc93J 1 Reply Last reply Reply Quote 0
                          • jhmc93J
                            jhmc93 @stephenw10
                            last edited by

                            @stephenw10 so how would i set the rule
                            WAN siide?
                            source?
                            destination lan subnet?

                            1 Reply Last reply Reply Quote 0
                            • stephenw10S
                              stephenw10 Netgate Administrator
                              last edited by

                              On the WAN interface.

                              Source: The laptop IP address or the full WAN subnet

                              Destination: The LAN side host or the full LAN subnet

                              Protocol: icmp to allow pings or all to allow any traffic type.

                              jhmc93J 1 Reply Last reply Reply Quote 0
                              • jhmc93J
                                jhmc93 @stephenw10
                                last edited by

                                @stephenw10 So this is the outcome:
                                Screenshot_5.png

                                The rule I have set:
                                Screenshot_6.png

                                1 Reply Last reply Reply Quote 0
                                • stephenw10S
                                  stephenw10 Netgate Administrator
                                  last edited by stephenw10

                                  You are pinging 70.86.90.1 but your rule is passing traffic for destination 70.86.90.2. So it's not matching.

                                  I assume you are seeing those pings blocked in the firewall logs?

                                  jhmc93J 1 Reply Last reply Reply Quote 0
                                  • jhmc93J
                                    jhmc93 @stephenw10
                                    last edited by

                                    @stephenw10 yes it must be?? have a look at below picture:
                                    Screenshot_7.png

                                    1 Reply Last reply Reply Quote 0
                                    • patient0P
                                      patient0 @jhmc93
                                      last edited by patient0

                                      @jhmc93 I'm not really following here, just one thing: you'll have to disable the 'Block private networks ...' on your WAN interface if your WAN IP is a private address. Which 192.168.0.75 is.

                                      jhmc93J 1 Reply Last reply Reply Quote 1
                                      • patient0P patient0 referenced this topic on
                                      • jhmc93J
                                        jhmc93 @patient0
                                        last edited by

                                        @patient0 ok thanks

                                        1 Reply Last reply Reply Quote 0
                                        • stephenw10S
                                          stephenw10 Netgate Administrator
                                          last edited by

                                          Yes if you still had that set it would block it.

                                          But check the firewall logs like I said several times. That will show you if it's being blocked and by what rule if it is.

                                          jhmc93J 1 Reply Last reply Reply Quote 0
                                          • jhmc93J
                                            jhmc93 @stephenw10
                                            last edited by

                                            @stephenw10 ok I will try it later on my test machine

                                            1 Reply Last reply Reply Quote 0
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