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

    LAN with multiple subnets

    Scheduled Pinned Locked Moved Routing and Multi WAN
    17 Posts 3 Posters 5.4k 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.
    • DerelictD
      Derelict LAYER 8 Netgate
      last edited by

      pfSense doesn't do that.  You have something wrong.  If it's not marked as the default gateway it will not use it as the default gateway.

      Post your config.  Gateways, Routes, interface configurations.

      Post a drawing.

      Don't tell us what you think you have done.  Show us exactly what you HAVE done.

      If you had configured it like that it would be working.  Always.

      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
      • R
        Raiker
        last edited by

        It might have something to do with the finicky-ness of the internet links down here, at least one of the times this ocurred i had reconfigured the main switch therefore causing pfSense to mark all gateways as down.
        Attached are the VM config, where each WAN has a vlan and it's interface, the interface tab and the route tab.
        Network config is:
        VMCluster -> bladecenter stacked switch - > main switch (in trunk mode, ESXi deals with untagging the vlans)
        WAN1-4 -> main switch (with the ports correctly set as general, untagged and the corresponding vlan id)

        Like i said, it works. it just so happens that for some reason it suddenly wants to route thru the LANGW. nothing in the logs saying why or how it does that (at least not after a reboot)

        ![vm config.png](/public/imported_attachments/1/vm config.png)
        ![vm config.png_thumb](/public/imported_attachments/1/vm config.png_thumb)
        vm_ifs.png
        vm_ifs.png_thumb
        vm_routes.png
        vm_routes.png_thumb
        vm_if_if.png
        vm_if_if.png_thumb

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

          What is the interface address and subnet mask configured on pfSense LAN?

          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
          • R
            Raiker
            last edited by

            10.222.254.251 /16, in the old non-subnetted range.

            lan_iface.png
            lan_iface.png_thumb

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

              What else do you have anywhere that starts with 10.222 ?? besides the switch at 10.222.255.254

              No idea why you have that on a /16 but it's your network.

              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
              • R
                Raiker
                last edited by

                It's a /16 because i was young and stupid at the time (might be stupid still…) and didn't know anything about networking, vlans, subnets and didn't have hardware that supported it. The separate ranges are for each lab and it's people to be able to configure PXE, BOOTP, DHCP, and all the other multicast stuff they might want without crashing the rest of the network.

                The stuff still on the 10.222.0.0/16 are some of the labs that i haven't been able to move to VLANs yet and one of the DCs that is awaiting new licenses for a migration.

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

                  So everything's working now and the issue is why, as you say, pfSense uses LANGW as the default gateway right?

                  Did you do something silly like make a failover gateway group with WAN and LANGW as members?

                  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
                  • R
                    Raiker
                    last edited by

                    No, only the real WAN GWs are included in the gateway groups. i have 3 with different tiers for different needs (adsl for the visitors, cablemodem for users, best one for the servers, etc)

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

                      Well, pfSense doesn't just arbitrarily route out LAN so I guess I don't know what to tell you.

                      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
                      • R
                        Raiker
                        last edited by

                        Damm, i hoped i had something misconfigured. Well, i'll try to delve deeper and see if it happens again.
                        Thanks!

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

                          You might but I have no idea where to tell you to look next.  Grep WANGW in /tmp/rules.debug and see if it's somewhere it shouldn't be.  Take a good, long look at what's really happening next time it blows up.  At least get a copy of Diagnostics > Routes.

                          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
                          • First post
                            Last post
                          Copyright 2025 Rubicon Communications LLC (Netgate). All rights reserved.