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

    Subnet communication

    Scheduled Pinned Locked Moved Routing and Multi WAN
    8 Posts 5 Posters 1.7k 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.
    • O
      Oats
      last edited by

      Hope this is the right section for this. I am having issues with hosts on 2 subnets communicating with each other. This is a recent setup after a tear down, they were communicating just fine prior to the rebuild.

      LAN (192.168.10.1) -> Host1 (192.168.10.10)

      OPT1 (192.168.30.1) -> Host2 (192.168.30.10)

      Host1 can ping host2 but host2 can't ping host1.

      Firewall does not seem to be blocking any traffic, I've tried adding allow rules to see if that worked.

      I hope I was able to convey my issue.

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

        What do your OPT1 and LAN firewall rules look like?

        Gateway correct on the Host 2 computer?

        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
        • O
          Oats
          last edited by

          OP1 is currently allow any ipv4 and 6
          LAN is currently the default (anti-lockout, ipv4 allow to any rule) I had added a LAN rule for any source from OPT1 but it made no difference.

          Gateway is good on host2 (192.168.30.1), it can ping LAN and outside.

          1 Reply Last reply Reply Quote 0
          • B
            BJXYZ
            last edited by

            You can add an block rule for anything at least  of your ruleset for opt1 and enable log any pakages. Then you can check if ping is blocked by the firewall.

            WHen nothing gets blocked perhaps Host1 has a software firewall enabled?

            1 Reply Last reply Reply Quote 0
            • O
              Oats
              last edited by

              So here is something strange. I can't get a ping out but VSphere (host1) can connect to ESXi (host2).

              Did a LAN rile for allow any - any with logs on. Didn't see any comms from host2 to host1
              Tried shutting down host based firewall, no change

              1 Reply Last reply Reply Quote 0
              • O
                Oats
                last edited by

                Looks like there is a bigger issue. My LAN connection is randomly going down so that I cannot even ping the firewall or SSH in.
                Tried changing the NIC but no change.
                Restarting the router gets me connected for a few minutes then dies. But my OPT1 connection is fine (I'm using it right now). LAN was fine a few days ago and just stopped working today.

                No idea how to proceed.

                UPDATE: Was consoled in and got the following message when the connection dropped:
                watchdog timeout
                msk1: prefetch unit stuck?
                msk: initialization failed: no memory for Rx buffers
                msk1: prefetch unit stuck?
                msk: initialization failed: no memory for Rx buffers

                going to try thishttps://forum.pfsense.org/index.php/topic,57238.0.html

                UPDATE: stephenw10's fix above solved the dropping issue. Now back to the original issue.

                1 Reply Last reply Reply Quote 0
                • D
                  deanot
                  last edited by

                  You're in the same boat I am, I can't find the fix for it either… did you figure it out?

                  PFSense System Specs.
                  –---------------
                  Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz
                  4 CPUs: 1 package(s) x 4 core(s) 4 port HP Branded Intel Ethernet Card

                  1 Reply Last reply Reply Quote 0
                  • M
                    mikeisfly
                    last edited by

                    @Oats:

                    Looks like there is a bigger issue. My LAN connection is randomly going down so that I cannot even ping the firewall or SSH in.
                    Tried changing the NIC but no change.
                    Restarting the router gets me connected for a few minutes then dies. But my OPT1 connection is fine (I'm using it right now). LAN was fine a few days ago and just stopped working today.

                    No idea how to proceed.

                    UPDATE: Was consoled in and got the following message when the connection dropped:
                    watchdog timeout
                    msk1: prefetch unit stuck?
                    msk: initialization failed: no memory for Rx buffers
                    msk1: prefetch unit stuck?
                    msk: initialization failed: no memory for Rx buffers

                    going to try thishttps://forum.pfsense.org/index.php/topic,57238.0.html

                    UPDATE: stephenw10's fix above solved the dropping issue. Now back to the original issue.

                    Could be a personal firewall on one of your clients. I would try temporarily disabling it. If that fixes it just add an exception to allow the traffic.

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