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    Routing Problem in Test Network

    Scheduled Pinned Locked Moved OpenVPN
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    • A
      Alejandro.Carbonara
      last edited by

      The route was set before running the command.

      I've started and stopped the openVPN client several times on the machine, so it may have been set earlier.

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      • johnpozJ
        johnpoz LAYER 8 Global Moderator
        last edited by

        "192.168.57.0    0.0.0.0            255.255.255.0  U        0    0          0 eth1"

        That route is not going down your tunnel.. So how would you expect to get their through the tunnel.. Seems your client is trying to go out eth1 to get there.  With no gateway so it thinks that network is on its eth1 interface.

        An intelligent man is sometimes forced to be drunk to spend time with his fools
        If you get confused: Listen to the Music Play
        Please don't Chat/PM me for help, unless mod related
        SG-4860 24.11 | Lab VMs 2.8, 24.11

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        • V
          viragomann
          last edited by

          I think, that's just the way how his OS prints networks connected directly to an interface. The line has only an U-flag, no G for a gateway.
          It the same as
          10.0.2.0          0.0.0.0            255.255.255.0  U        0    0          0 eth0

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          • V
            viragomann
            last edited by

            Now, as the route is set as it should be, why do you think, you have a routing problem?

            Try to ping pfSense internal address and see if you get a response.

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            • A
              Alejandro.Carbonara
              last edited by

              As of now, I can ping the internal ip of pfsense and get a positive response.

              Attempting to ping the internal machine gets me no response whatsoever.

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              • V
                viragomann
                last edited by

                Check the firewall of the internal machine.

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                • A
                  Alejandro.Carbonara
                  last edited by

                  The target machine is an ubuntu server VM.

                  sudo ufw status
                  Status: inactive

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                  • V
                    viragomann
                    last edited by

                    And its default gateway is set to 192.168.58.2 (the pfSense internal address)?

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                    • johnpozJ
                      johnpoz LAYER 8 Global Moderator
                      last edited by

                      Oh my bad.. I was reading that you wanted to get to 192.168.57… ooops..

                      If you can ping the internal IP address of pfsense then your tunnel is up and routing that network down the tunnel.  Not being able to get to the machine on the network behind pfsense points to problem on the machine.  As viragomann pointed out host firewall and or wrong gateway on the host not pointing back to pfsense are 2 very common problems.

                      Just because ufw is not running does not mean for example iptables is not running.. I run iptables on my ubuntu vms not ufw..

                      An intelligent man is sometimes forced to be drunk to spend time with his fools
                      If you get confused: Listen to the Music Play
                      Please don't Chat/PM me for help, unless mod related
                      SG-4860 24.11 | Lab VMs 2.8, 24.11

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                      • A
                        Alejandro.Carbonara
                        last edited by

                        The routing table on the internal machine looks like:

                        Kernel IP routing table
                        Destination    Gateway        Genmask        Flags Metric Ref    Use Iface
                        default        10.0.2.2        0.0.0.0        UG    0      0        0 eth0
                        10.0.2.0        *              255.255.255.0  U    0      0        0 eth0
                        192.168.58.0    *              255.255.255.0  U    0      0        0 eth1

                        Also, I checked and iptables is all accept rules.

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                        • johnpozJ
                          johnpoz LAYER 8 Global Moderator
                          last edited by

                          Well how is that going to work??

                          Your sending unknown networks out 10.0.2.2

                          So how exactly would it get to the vpn clients ip on 192.168.80.0/24

                          Your going to have to create a host route on this machine pointing 192.168.80.0/24 to the 192.168.58 IP of pfsense.

                          Or you would have to source nat your vpn clients to look like they are coming from the 192.168.58 IP of pfsense so your host there knows how to talk to it.

                          An intelligent man is sometimes forced to be drunk to spend time with his fools
                          If you get confused: Listen to the Music Play
                          Please don't Chat/PM me for help, unless mod related
                          SG-4860 24.11 | Lab VMs 2.8, 24.11

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                          • A
                            Alejandro.Carbonara
                            last edited by

                            I was able to resolve the problem! There was some weirdness going on because I had set up the machine on an internal network.

                            johnpoz was right, in that the problem was in the routing table of the internal machine. Once I fixed the internal machine to use the firewall as a gateway, I was able to VPN to it from the external machine.

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