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

    fresh install LAN cannot connect to WAN gateway

    Scheduled Pinned Locked Moved Firewalling
    4 Posts 2 Posters 488 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.
    • M
      mr.montesa
      last edited by

      Hey specialists,
      I'm feeling quite dump right now as the problem sounds really basic. If setup a new pair of pfsense physical boxes in HA mode and configured an easy setup.
      ISP <->Fritzbox<->pfsense<->LAN switch
      Fitzbox has 172.21.0.1 in /24
      Pfsense WAN has 172.21.02 as CARP and .3 & .4
      Pfsense LAN has 172.21.30.1 as CARP and 2. & .3

      • I can ping from the Firewall to Internet using WAN interface
      • I cannot ping from the Firewall to Internet using LAN interface
      • a LAN client can ping its default GW (the pfsense carp IP)
      • a LAN client can ping the WAN IPs of the pfsense
      • a LAN client cannot ping the Fritzbox gateway
      • Pfsense can trace the internet using WAN source address
      • Pfsense cannot trace the internet using LAN source address

      For testing purposes I disabled firewalling completly via advancend menue. I can only imagine some NAT issues, but Outbound NAT is set to Automatic.

      I'm quite puzzled. Anyone an idea what check?
      Thanks much and let me know if you need more info.
      Best Sebastian

      1 Reply Last reply Reply Quote 0
      • RicoR
        Rico LAYER 8 Rebel Alliance
        last edited by Rico

        I'd check these Resources for any Config Errors first:
        https://www.netgate.com/docs/pfsense/book/highavailability/high-availability-troubleshooting.html
        https://www.netgate.com/docs/pfsense/book/highavailability/index.html
        https://www.netgate.com/docs/pfsense/highavailability/configuring-high-availability.html
        https://www.youtube.com/watch?v=VnBnnh81G7w

        -Rico

        1 Reply Last reply Reply Quote 0
        • M
          mr.montesa
          last edited by

          Hey Rico,
          appriciate your reply on this. Your RTFM reply got me going :-) as I reviewed the NAT part of my setup and indeed I just had to configure manual NAT and change the rules to have the CARP address. re-enabling the firewall via advanced menu which also enables NAT'ing again did cost me another 30mins :-)
          Again, many thanks for pointing me to the right direction.

          1 Reply Last reply Reply Quote 0
          • RicoR
            Rico LAYER 8 Rebel Alliance
            last edited by

            You're welcome, glad you have it up and running now. ☺

            -Rico

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