Netgate Discussion Forum
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Search
    • Register
    • Login

    LAN across routers

    Scheduled Pinned Locked Moved Off-Topic & Non-Support Discussion
    7 Posts 3 Posters 1.5k Views
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • chpalmerC
      chpalmer
      last edited by

      I have a set of devices that will only work (communicate with each other) on a local LAN.  I want to place one device out on a remote site (behind router A) which crosses a few networks (all VPN and private) to get to the device on the other end (behind router Z) on the same subnet..

      Possible scenario?

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

      1 Reply Last reply Reply Quote 0
      • DerelictD
        Derelict LAYER 8 Netgate
        last edited by

        If it is an absolute requirement and cannot be routed, probably a TAP-mode OpenVPN.

        I don't see anything on the docs wiki but there is something in the book:

        https://portal.pfsense.org/docs/book/openvpn/bridged-openvpn-connections.html

        Chattanooga, Tennessee, USA
        A comprehensive network diagram is worth 10,000 words and 15 conference calls.
        DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
        Do Not Chat For Help! NO_WAN_EGRESS(TM)

        1 Reply Last reply Reply Quote 0
        • chpalmerC
          chpalmer
          last edited by

          @Derelict:

          If it is an absolute requirement and cannot be routed, probably a TAP-mode OpenVPN.

          Thanks good read!  I may try an experiment this weekend.

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

          1 Reply Last reply Reply Quote 0
          • johnpozJ
            johnpoz LAYER 8 Global Moderator
            last edited by

            "I have a set of devices that will only work (communicate with each other) on a local LAN."

            Why?  Do they not have the ability to set a gateway?  Do they use some sort of L2 only protocol?

            You can create a TAP connection in openvpn… But maybe the requirement is not same layer2 or no gateway but latency issue?  What are these devices and we can dig a bit deeper, etc.

            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

            1 Reply Last reply Reply Quote 0
            • chpalmerC
              chpalmer
              last edited by

              @johnpoz:

              Why?  Do they not have the ability to set a gateway?  Do they use some sort of L2 only protocol?
              What are these devices and we can dig a bit deeper, etc.

              Im digging a little bit myself as Im not sure the "proposing" engineer is correct based on a document I looked at..

              These are a VOIP style device that transport radio audio between radio systems and dispatch consoles.  Due to NDA I have to withhold brand and model till I find out more what I can and can't do..  But I believe its a lack of gateway issue if it actually really exists.

              But the VPN via tap helps me with my argument..  ;)

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

              1 Reply Last reply Reply Quote 0
              • johnpozJ
                johnpoz LAYER 8 Global Moderator
                last edited by

                transmitting audio is going to come into a latency issue as well..  This remote site is how far away connected how?

                And this traffic is going to flow over other VPNs?  You mention networks.. So your going to tunnel inside a tunnel - not the most efficient mode of travel ;)  And your talking voice which is small - but are you talking udp I would assume for the voice transmit - are you going to put that inside any tcp vpn tunnel?

                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

                1 Reply Last reply Reply Quote 0
                • chpalmerC
                  chpalmer
                  last edited by

                  @johnpoz:

                  This remote site is how far away connected how?

                  The existing network was at the time it was built the largest private VOIP type network in the world.  Its radio audio so one way at a time generally. Latency is not as big an issue as two way audio would be.

                  Makes use of microwave, fiber and even some t-1's thrown in for good measure.

                  The new proposed equipment was said to be unable to span subnets but Ive since found a document that says otherwise. So this is a non issue. But it does raise my eyebrows about the quality of people we were sent..

                  :o

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

                  1 Reply Last reply Reply Quote 0
                  • First post
                    Last post
                  Copyright 2025 Rubicon Communications LLC (Netgate). All rights reserved.