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

    2 WAN interfaces

    Scheduled Pinned Locked Moved Routing and Multi WAN
    13 Posts 7 Posters 7.4k 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.
    • T Offline
      tim.mcmanus
      last edited by

      @sasha:

      I have one pfSense with 2 WAN and 1 LAN interface. WAN and OPT1 interfaces get IP through DHCP and have the same gataway.

      Your WAN interfaces need to have different gateways in order for dual-WAN to work.

      1 Reply Last reply Reply Quote 0
      • D Offline
        drzoidberg33
        last edited by

        @tim.mcmanus:

        @sasha:

        I have one pfSense with 2 WAN and 1 LAN interface. WAN and OPT1 interfaces get IP through DHCP and have the same gataway.

        Your WAN interfaces need to have different gateways in order for dual-WAN to work.

        What do you exactly mean by this? Both my wan interfaces have the same gateway IP because they both use the same ISP backbone however they are getting dialed through separate PPPoE interfaces. Will this cause issues?

        1 Reply Last reply Reply Quote 0
        • T Offline
          tim.mcmanus
          last edited by

          @drzoidberg33:

          What do you exactly mean by this? Both my wan interfaces have the same gateway IP because they both use the same ISP backbone however they are getting dialed through separate PPPoE interfaces. Will this cause issues?

          When you have two WAN interfaces using the same gateway, pfSense has no way to differentiate the routes.  They both have the same gateway.  Usually pfSense will pick the first route and ignore the second–again because it uses the gateway to differentiate the routes.

          1 Reply Last reply Reply Quote 0
          • S Offline
            sasha
            last edited by

            @drzoidberg33:

            What are the monitor IPs for both interfaces? You cannot use the same monitor IP for both interfaces - this might be something to look at.

            I disabled monitor for both interfaces (first disabled one but then nothing changed) since gateway is always up. But this did not help. System log is flooded/poisoned with messages "kernel: arpresolve: can't allocate llinfo for WANGW_IP".

            Both WAN interfaces have the same gateway (WANGW_IP) which is assigned by DHCP, I can't change that.

            Is there anything else to check?

            1 Reply Last reply Reply Quote 0
            • T Offline
              tim.mcmanus
              last edited by

              You can't use the same gateway on two WAN connections.  It won't work.  You would need to ask your ISP for a different gateways in order to have to unique routes.  Otherwise traffic will only go out the default gateway through one WAN connection.

              1 Reply Last reply Reply Quote 0
              • S Offline
                sasha
                last edited by

                But ingress traffic is routed well I think. Right?

                Except asking server hosting company to change their policy is there anything else I can do to solve this problem?

                1 Reply Last reply Reply Quote 0
                • K Offline
                  Kababayan
                  last edited by

                  Try use  a router on one of your one of your wan before connecting to PFsense, so that both wans wont use same gateway. It works for me. use external IP to monitor the wan with router.

                  1 Reply Last reply Reply Quote 0
                  • M Offline
                    martyn_m
                    last edited by

                    Support for two PPPoE WAN interfaces with the same gateway got added in 2.01, I've had it working (until I upgraded to 2.03 just now…). This may be a regression.

                    1 Reply Last reply Reply Quote 0
                    • J Offline
                      jamesl
                      last edited by

                      I think the confusion is a person can use the same gateway for dual wan, but you need to use "two different monitoring IP's". That is what i did to make my setup not show "Gathering Data State"

                      1 Reply Last reply Reply Quote 0
                      • M Offline
                        m3usv0x
                        last edited by

                        @jamesl:

                        I think the confusion is a person can use the same gateway for dual wan, but you need to use "two different monitoring IP's". That is what i did to make my setup not show "Gathering Data State"

                        You can have the same gateway for dual WAN, I am using one such setup now. I think since version 2.0 or maybe 2.0.1 you can have the same gateway for multiple interfaces via PPPoE.
                        Like this poster said, you need two different monitoring IPs. Really anything will do, but I liked to use my ISP's recommended DNS.

                        I was slamming my head against a wall with this too.
                        Change it, it should work.

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