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CARP Network Allocation Problem

Scheduled Pinned Locked Moved HA/CARP/VIPs
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  • T
    TheGeek
    last edited by Oct 18, 2017, 12:01 PM

    My setup is like this:

    WAN: Two /24 networks 192.168.1.0 and 192.10.50.0 (On the same cable)
    LAN: A /23 network 10.10.10.0
    DMZ: Bridged with WAN

    In order for the 192.10.50.0 to work and route packets i allocated this network using a ProxyARP on 1 out of 2 pfsenses. (And it works, as it should)
    I have set CARP adresses on both LAN and WAN, and although they sync settings, and CARP is working as it should, i can only access to DMZ and WAN when 1 out of 2 pfsenses are disconnected.
    Each one works individually, but not together.

    So, i need to resolve 2 problems in order to get a full redudant firewall.

    1. How can i solve the issue with the firewalls not working together?

    2. I read this https://forum.pfsense.org/index.php?topic=45209.msg240929#msg240929 but i don't understand how i am supposed to set it up, and which IP i will set as CARP, since i cannot create a CARP network

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    • D
      Derelict LAYER 8 Netgate
      last edited by Oct 18, 2017, 12:02 PM

      Bridging is completely incompatible with pfSense CARP/HA. If you choose to go down that path it is incumbent upon you to make sure all of the necessary spanning-tree pieces are in the right place.

      WAN: Two /24 networks 192.168.1.0 and 192.10.50.0 (On the same cable)

      This is also asking for trouble. Seems it has found 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)

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      • T
        TheGeek
        last edited by Oct 18, 2017, 12:04 PM

        Unfortunately, it is necessary for me to use bridge as the IPs of the devices i have on my DMZ need to match the WAN's IP.
        So, bridge and CARP are not gonna work?

        Yes, also the situation with 2 networks on one cable cannot change..  :-[

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        • D
          Derelict LAYER 8 Netgate
          last edited by Oct 18, 2017, 12:07 PM

          It can work, but it's on you to prevent any loops. I am not going down that rabbit hole. Design your network properly.

          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)

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          • T
            TheGeek
            last edited by Oct 18, 2017, 12:08 PM

            Ok, i see.
            Trust me, if i could, i would design it properly.
            And how could i prevent loops?
            Can you give me a link or something to read about it?

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            • D
              Derelict LAYER 8 Netgate
              last edited by Oct 18, 2017, 12:12 PM

              I find it humorous that you would be concentrating on HA before fixing such a broken design. If it is worth high-availability it is worth a solid design first.

              You prevent layer 2 loops using spanning-tree protocol

              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
              • T
                TheGeek
                last edited by Oct 18, 2017, 12:15 PM

                It is humorous, indeed.
                But still, not in my powers to change this.
                You wouldn't understand.
                But thank you very much for your time.
                I will try to see if HA can be achived, otherwise a cloned machine will be standing by, in case of a hardware failure.

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                • D
                  Derelict LAYER 8 Netgate
                  last edited by Oct 18, 2017, 12:19 PM

                  I understand perfectly.

                  It is those who are making you do this who don't understand.

                  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
                  • T
                    TheGeek
                    last edited by Oct 18, 2017, 12:24 PM

                    @Derelict:

                    It is those who are making you do this who don't understand.

                    Yep.
                    I guess i am not the only one.

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