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    Double NAT problem

    Scheduled Pinned Locked Moved NAT
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    • B
      balubeto
      last edited by

      @viragomann:

      Just ensure that both routers do NAT in both direction. On the VDSL router this should be set by default.
      On pfSense this is default as well, you may check it in Firewall > NAT > Outbound. It should be set to automatic rule generation.

      Also ensure that "Block private networks and loopback addresses" is unchecked in the WAN interface settings, since you have a private WAN subnet.

      These settings

      are right?

      Thanks

      Bye

      balubeto

      1 Reply Last reply Reply Quote 0
      • V
        viragomann
        last edited by

        Yeah, it should work properly with this setting.

        What's the problem?
        The crucial sentence in your first post
        @balubeto:

        So now, my LAN sees both the firewall NAT is that of the VDSL2 router causing some problems on the LAN.

        isn't understandable.

        1 Reply Last reply Reply Quote 0
        • B
          balubeto
          last edited by

          @viragomann:

          Yeah, it should work properly with this setting.

          What's the problem?
          The crucial sentence in your first post
          @balubeto:

          So now, my LAN sees both the firewall NAT is that of the VDSL2 router causing some problems on the LAN.

          isn't understandable.

          My computers with Windows 7 SP1 on the LAN see two NAT.

          Whereas if I unplug the VDSL2 router from the firewall, the computers see an only NAT and, therefore, the LAN is working properly.

          So how do I fix this?

          Thanks

          Bye

          balubeto

          1 Reply Last reply Reply Quote 0
          • JKnottJ
            JKnott
            last edited by

            How is your equipment connected?  I can't imagine any scenario in which a computer could see both, unless somehow connected to both.  Normally, when you have double NAT, you see only the one you're connected to.

            PfSense running on Qotom mini PC
            i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
            UniFi AC-Lite access point

            I haven't lost my mind. It's around here...somewhere...

            1 Reply Last reply Reply Quote 0
            • B
              balubeto
              last edited by

              @JKnott:

              How is your equipment connected?  I can't imagine any scenario in which a computer could see both, unless somehow connected to both.  Normally, when you have double NAT, you see only the one you're connected to.

              My LAN is composed of a hardware firewall, a NAS, a network printer, two smart TV and 6 computers with Windows 7 SP1. Also, I have a VDSL2 router, connected to the WAN port on the firewall, which provides Internet to the LAN.

              All of these network devices have fixed IPs and have the DHCP disabled.

              So why computers even see the router's NAT?

              Thanks

              Bye

              balubeto

              1 Reply Last reply Reply Quote 0
              • B
                balubeto
                last edited by

                I tried a new configuration of the firewall but the devices connected to the 192.168.1.0 network can still see the 10.0.0.0 network NAT causing malfunctions to the main network.

                If I disable the NAT of the 10.0.0.0 network, the first network returns to work properly but I have no more Internet on this network.

                So how should I do to make sure that the main network does not see the secondary network NAT?

                The new firewall (192.168.1.1) and VDSL2 router (10.0.0.1) configuration  is:











                Thanks

                Bye

                balubeto

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                • pttP
                  ptt Rebel Alliance
                  last edited by

                  ???  LAN: 192.168.1.1 with "GW_LAN: 192.168.1.1"  ?

                  https://doc.pfsense.org/index.php/Connectivity_Troubleshooting#LAN_Interface

                  1 Reply Last reply Reply Quote 0
                  • B
                    balubeto
                    last edited by

                    @ptt:

                    ???  LAN: 192.168.1.1 with "GW_LAN: 192.168.1.1"  ?

                    https://doc.pfsense.org/index.php/Connectivity_Troubleshooting#LAN_Interface

                    So, what should I change?

                    Thanks

                    Bye

                    balubeto

                    1 Reply Last reply Reply Quote 0
                    • B
                      balubeto
                      last edited by

                      @balubeto:

                      @ptt:

                      ???  LAN: 192.168.1.1 with "GW_LAN: 192.168.1.1"  ?

                      https://doc.pfsense.org/index.php/Connectivity_Troubleshooting#LAN_Interface

                      So, what should I change?

                      Thanks

                      Bye

                      If I set the LAN interface to 192.168.1.254, the Internet does not work anymore. Why?

                      Thanks

                      Bye

                      balubeto

                      1 Reply Last reply Reply Quote 0
                      • V
                        viragomann
                        last edited by

                        You should not set any gateway on LAN interface if the pfSense is the LAN gateway.

                        1 Reply Last reply Reply Quote 0
                        • B
                          balubeto
                          last edited by

                          I also tried to change the LAN gateway, but it is always offline.




                          Where am I wrong?

                          Thanks

                          Bye

                          balubeto

                          1 Reply Last reply Reply Quote 0
                          • H
                            hda
                            last edited by

                            @balubeto:

                            Where am I wrong?

                            Besides Trial & Horror, read #12 again. Remove that gateway for the LAN…

                            1 Reply Last reply Reply Quote 0
                            • B
                              balubeto
                              last edited by

                              @hda:

                              @balubeto:

                              Where am I wrong?

                              Besides Trial & Horror, read #12 again. Remove that gateway for the LAN…

                              I deleted the gateway that was always offline.The router's NAT causes some malfunctions and slowdowns in the LAN.

                              If, though, off the NAT the LAN returns to work, but the Internet does not work on the LAN.If I put the router in Bridge mode (disabling its NAT and disconnecting the Internet connection) I should enable the PPPoE client on the firewall to manage the Internet on the LAN.

                              In this case, but, the analog phone and fax machine connected to the router will not work.

                              So how do I solve this problem of the phone and fax?

                              Thanks

                              Bye

                              balubeto

                              1 Reply Last reply Reply Quote 0
                              • B
                                balubeto
                                last edited by

                                If I had to do in this way:




                                I would still have the Internet service on the LAN?

                                Thanks

                                Bye

                                balubeto

                                1 Reply Last reply Reply Quote 0
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