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Accessing modem from lan. I don't have option to add an interface.

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  • J
    JimS
    last edited by Oct 30, 2022, 8:31 PM

    I want to access my modem and found the docs that say to go to Interfaces/Assignments and add a new interface. I already have OPT1 assigned for vpn and don't have an option to add a port there. I am guessing that's because I already have OPT1 assigned but seems strange that I would be limited to 1 additional. How to proceed? This is on 22.05 plus.

    V 1 Reply Last reply Oct 30, 2022, 8:44 PM Reply Quote 0
    • V
      viragomann @JimS
      last edited by Oct 30, 2022, 8:44 PM

      @jims
      The doc article describes accessing a modem with a PPP connection.
      What is your WAN interface IP setting, DHCP? Do you have a public WAN IP?

      J 1 Reply Last reply Oct 30, 2022, 10:01 PM Reply Quote 0
      • J
        JimS @viragomann
        last edited by Oct 30, 2022, 10:01 PM

        @viragomann Yes, DHCP with a public IP.

        V J 2 Replies Last reply Oct 30, 2022, 10:09 PM Reply Quote 0
        • V
          viragomann @JimS
          last edited by viragomann Oct 30, 2022, 10:13 PM Oct 30, 2022, 10:09 PM

          @jims
          So your modem has a additionally an IP in a private network, I guess.

          Now you have to assign an additional IP to pfSense WAN interface as well:
          Firewall > virtual IPs
          Assign a virtual IP of type "IP alias" out of the modems private subnet to the WAN interface as well.

          Configure the outbound NAT as described in the docs to nat packets destined to the modems private IP to the virtual IP.

          J 1 Reply Last reply Oct 31, 2022, 12:57 AM Reply Quote 1
          • J
            JKnott @JimS
            last edited by Oct 31, 2022, 12:55 AM

            @jims

            Perhaps you could mention the modem model. Someone here might know how to access it. For example, with my Technicolor modem, I connect to 10.0.0.1.

            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
            • J
              JKnott @viragomann
              last edited by Oct 31, 2022, 12:57 AM

              @viragomann

              My modem's address is 10.0.0.1, but I don't have to create an alias to access it. It works automagically. I suspect the modem is smart enough to recognize that address when a packet to it passes through.

              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
              • J
                JimS
                last edited by Oct 31, 2022, 12:27 PM

                Modem is e31U2V1. From some additional reading there is no way for me to access the modem. I'm guessing Spectrum must have a way.

                V 1 Reply Last reply Oct 31, 2022, 12:35 PM Reply Quote 0
                • V
                  viragomann @JimS
                  last edited by Oct 31, 2022, 12:35 PM

                  @jims said in Accessing modem from lan. I don't have option to add an interface.:

                  Modem is e31U2V1. From some additional reading there is no way for me to access the modem.

                  Can you access to the modems web GUI if you connect a computer directly to it?
                  If yes, there would also be a way to access it through pfSense.

                  M 1 Reply Last reply Oct 31, 2022, 12:48 PM Reply Quote 0
                  • M
                    mcury @viragomann
                    last edited by Oct 31, 2022, 12:48 PM

                    Try this:

                    Create a virtual IP in the same network as your modem, in this example I'll use 10.0.0.1 as an example: Where you read MVNETA1, use OPT1.

                    21afc87d-3859-4254-8f4a-a133318fe22a-image.png

                    Create an Outbound NAT, in this example I'll assume your LAN is 192.168.0.0/24:

                    679fd839-79df-4488-8a88-d9aeda5484e3-image.png

                    dead on arrival, nowhere to be found.

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