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    [Solved] pfSense between WAN (Cable Router) and LAN

    Routing and Multi WAN
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    • O
      oelauge
      last edited by

      Hi,

      i want to use pfsense between my LAN and WAN (Cable ISP). From my ISP i have got a Router with a build in cable modem and i have no chance to use the router only as cable modem. The following figure make it easier to understand my problem.

      WAN / Internet
                 :
                 : DialUp-Cable-Provider
                 :
           .–---+-----.
           |  Gateway  |  (Router with integrated Cable Modem)
           '-----+-----'
                 |
                 |
           .-----+-----.
           |  pfSense |
           '-----+-----'
                 |
             LAN | 192.168.245.50 (Gateway and DNS for the Clients)
                 |
           .-----+------.
           | LAN-Switch |
           '-----+------'
                 |
         ...-----+------... (Client/192.168.245.100)

      I want to use pfSense as firewall for the traffic and as DNS-Adress for the clients. From my point of view it should be enough to setup pfSense for the WAN interface with a 'Static' address to the Cable-Router. All packets should be flowed through pfSense to the Cable-Router, thats all. But it doesn't work. The clients have to the network setup as gateway and DNS the TCP/IP adress from the pfSense (192.168.245.50).

      What must i do to let work pfSense together with the ISP Cable-Router?

      Thank you and

      best regards

      Oelauge

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      • chpalmerC
        chpalmer
        last edited by

        Can you put the cable gateway in bridge mode?

        Triggering snowflakes one by one..
        Intel(R) Core(TM) i5-4590T CPU @ 2.00GHz on an M400 WG box.

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        • O
          oelauge
          last edited by

          @chpalmer:

          Can you put the cable gateway in bridge mode?

          Sorry no. But now i try to configure pfsense as transparent firewall. I think, in this case i have as minimum the firewall functionalities. I will post my experiences.

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          • GruensFroeschliG
            GruensFroeschli
            last edited by

            What IPs are used between the pfSense and the cable-modem?
            Is it the same subnet than you use in your LAN?
            –> That wouldn't work.

            We do what we must, because we can.

            Asking questions the smart way: http://www.catb.org/esr/faqs/smart-questions.html

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            • O
              oelauge
              last edited by

              @GruensFroeschli:

              What IPs are used between the pfSense and the cable-modem?
              Is it the same subnet than you use in your LAN?
              –> That wouldn't work.

              Hi GruensFroeschli,

              Your tip was gold worth. It runs and here is my solution:

              WAN / Internet
                         :
                         : DialUp-Cable-Provider
                         :
                   .–---+-----.
                   |  Gateway  |  (Router, Fritzbox 6360 Cable)
                   '-----+-----'
                         | LAN 10.100.100.1/24
                         |
                         | WAN 10.100.100.2/24 (Static)
                   .-----+-----.
                   |  pfSense |
                   '-----+-----'
                         | LAN 192.168.245.50/24
                         |
                         |
                   .-----+------.
                   | LAN-Switch |
                   '-----+------'
                         |
                         |
                         | LAN 192.168.245.100/24
                   .-----+------.
                   | PC          | (PC/Client-LAN 192.168.245.100/24 with Gateway and DNS 192.168.245.50)
                   '-----+------'

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