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    DHCP Relay to DHCP on Domain Contoller

    Scheduled Pinned Locked Moved DHCP and DNS
    6 Posts 3 Posters 1.2k Views
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    • B
      BearBear
      last edited by

      Hello,

      I have a domain controller configured with DNS and DHCP on subnet A.  I would like to create a new subnet, Subnet B, to simulate a subnet on the same domain.  I would like for the subnet B computers to get their IP address from the domain controller on subnet A.  I am using the most current version of pfSense and setup the settings similar to my pfSense router on subnet A.

      I can assign a static IP address to the clients on subnet B but if I try to have them receive an automatic IP assignment from DHCP on subnet A it does not work.  I setup a new subnet in the Domain Controller (sites and services) on subnet A to account for the IP address range on subnet B.  I setup a new IPv4 scope in DHCP for subnet B.  I read online that DNS forward or reverse lookup zones do not need to be configured for subnet B (could be wrong though)

      I tried so many different settings in pfSense but I haven't figured out the right combination.  I tried DHCP relay for LAN, then I tried WAN and LAN, and neither worked.  I tried playing with the DNS settings (DNS Forward and Relay) but that did not work either.

      I would appreciate any help or other posts I should read to try and get this running smoothly.  Thank you in advance!

      Scenario I'm trying to achieve
      Subnet B(pfSense router) –> Subnet A (pfSense router)--> WAN

      Subnet A - 192.168.10.0/24
      Domain Name:  train.local
      Domain Controller:  192.168.10.12
      Default Gateway:  192.168.10.1
      DNS and DHCP are configured on Win Server 2012 R2
      EM1 = WAN - 192.168.2.1 (DHCP assigned by upstream router)
      EM0 = LAN - 192.168.10.1 (static IP - DHCP turned off on pfSense)

      Subnet B - 192.168.4.0/24
      EM1 = WAN - 192.168.10.20 (DHCP assigned by DC01.train.local)
      EM0 = LAN - 192.168.4.1 (static IP - DHCP turned off on pfSense)

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      • D
        doktornotor Banned
        last edited by

        You'd better use a recent 2.3.3 snapshot to use DHCP relay.

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        • M
          Mypfsense2016
          last edited by

          So Dhcp relay is not working until 2.3.3?
          Thanks a lot.

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          • D
            doktornotor Banned
            last edited by

            Yeah, it's not working with 2.3.2-* at all. It worked with 2.3.1, it's been working for a while with 2.3.3 snapshots. (Filed multiple bugs about it, so I'm very very sure it just does not work with 2.3.2)

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            • M
              Mypfsense2016
              last edited by

              Actually, I use old version 2.1.3  :-
              I'm just wondering Dhcp relay ever works before as I hit problems configure it.

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              • D
                doktornotor Banned
                last edited by

                Well, 2.1.3 is something you definitely should NOT be using, DHCP relay or not.

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