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    Need to use DHCP Relay AND Server on the same pfSense setup, no L3 switch at disposal

    Scheduled Pinned Locked Moved DHCP and DNS
    15 Posts 4 Posters 1.0k Views
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    • M
      mleone87 @JKnott
      last edited by

      @JKnott there is an AD server with DHCP/DNS enabled, just for historical reasons, not practical. All networks relayed actually relay to that server. The migration from sonicwalls to pfsense would be a simple porting in the 1st phase and a decommission of AD DHCP in the 2nd phase

      my real question is why on sonicwall si so simple to do that :)

      thanks

      JKnottJ 1 Reply Last reply Reply Quote 0
      • johnpozJ
        johnpoz LAYER 8 Global Moderator
        last edited by johnpoz

        @mleone87 said in Need to use DHCP Relay AND Server on the same pfSense setup, no L3 switch at disposal:

        my real question is why on sonicwall si so simple to do that :)

        Do what run a dhcpd and relay on the same box.. Not some screaming feature that would have much use to be honest.. You either run dhcpd on pfsense, or you use it as a relay.

        Most larger networks that would run their own dedicated dhcpd have little use of the pretty basic dhcpd on pfsense. But if its going to route your L3, then dhcp relay would be needed.. To be honest if your a AD shop, it would make zero sense to move dns and dhcp to pfsense. Are you moving away from AD completely? If so then yeah you can run dhcpd on pfsense, and sure provide dns.. But your already a AD shop, and still going to be - I wouldn't want to move those services to pfsense.

        An intelligent man is sometimes forced to be drunk to spend time with his fools
        If you get confused: Listen to the Music Play
        Please don't Chat/PM me for help, unless mod related
        SG-4860 24.11 | Lab VMs 2.8, 24.11

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        • JKnottJ
          JKnott @mleone87
          last edited by

          @mleone87 said in Need to use DHCP Relay AND Server on the same pfSense setup, no L3 switch at disposal:

          my real question is why on sonicwall si so simple to do that :)

          How does it sort out which requests go to the local DNS and which get relayed?

          PfSense running on Qotom mini PC
          i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
          UniFi AC-Lite access point

          I haven't lost my mind. It's around here...somewhere...

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          • M
            mleone87 @johnpoz
            last edited by

            @johnpoz we will move all functionalities to pfsense box since DHCP/DNS feature of AD are only for address reservation

            @JKnott I'm not the most expert networking GUI on the planet but you the software bind the port per interface and not for all interfaces like pfsense does, it's the most easy thing to do :)

            johnpozJ 1 Reply Last reply Reply Quote 0
            • johnpozJ
              johnpoz LAYER 8 Global Moderator
              last edited by

              @mleone87 said in Need to use DHCP Relay AND Server on the same pfSense setup, no L3 switch at disposal:

              DHCP/DNS feature of AD are only for address reservation

              Didn't answer my question - are your devices members of the AD? If your going to continue to use AD, members of and uses login.. It makes no sense to move DNS which a vital role in how AD works to somewhere else, and dhcp goes hand in hand with that.

              An intelligent man is sometimes forced to be drunk to spend time with his fools
              If you get confused: Listen to the Music Play
              Please don't Chat/PM me for help, unless mod related
              SG-4860 24.11 | Lab VMs 2.8, 24.11

              1 Reply Last reply Reply Quote 0
              • johnpozJ
                johnpoz LAYER 8 Global Moderator @mleone87
                last edited by

                @mleone87 said in Need to use DHCP Relay AND Server on the same pfSense setup, no L3 switch at disposal:

                it's the most easy thing to do :)

                So code will be submitted to pull this weekend by you I guess??

                An intelligent man is sometimes forced to be drunk to spend time with his fools
                If you get confused: Listen to the Music Play
                Please don't Chat/PM me for help, unless mod related
                SG-4860 24.11 | Lab VMs 2.8, 24.11

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                • M
                  mleone87
                  last edited by mleone87

                  Here we go, same old story pfSense staff eh?
                  Blame people to do pull request it's not the best way to handle help req in forums, and it's even worst if you think that I made my client spend a lot of money for a couple of xg7100 probabily in the last ever suggestion about this software again.

                  I'l put again the original question: How to use DHCP Relay AND Server on the same pfSense setup
                  It can't be possible because whatever? Fine thanks

                  Good joob anyway to loose another paying customer ;)

                  Edit: we can close now since I do not have time to handle other smart guys

                  JKnottJ 1 Reply Last reply Reply Quote 0
                  • JKnottJ
                    JKnott @mleone87
                    last edited by

                    @mleone87

                    One thing to bear in mind is that pfSense is built on FreeBSD, which is where many of the limitations come from. Something like this might require change from the FreeBSD team.

                    PfSense running on Qotom mini PC
                    i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
                    UniFi AC-Lite access point

                    I haven't lost my mind. It's around here...somewhere...

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                    • jimpJ
                      jimp Rebel Alliance Developer Netgate
                      last edited by

                      It isn't possible because of the way DHCP relay needs to latch onto upstream and downstream interfaces and the way the DHCP daemon latches onto interfaces.

                      With significant development work it might be possible to restrict the interface bindings and maybe have it work for some cases, but it's a lot of effort for minimal benefit.

                      If you have a decent switch, enable DHCP relay/ip helper in the switch for the segments you want to relay, and then you don't have to worry about having pfSense do it.

                      Remember: Upvote with the 👍 button for any user/post you find to be helpful, informative, or deserving of recognition!

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                      • johnpozJ
                        johnpoz LAYER 8 Global Moderator
                        last edited by

                        @jimp said in Need to use DHCP Relay AND Server on the same pfSense setup, no L3 switch at disposal:

                        but it's a lot of effort for minimal benefit.

                        Exactly... What 1 user out 50k might have use of this.. And at that they just too lazy or cheap to do it correctly on their L2 infrastructure...

                        An intelligent man is sometimes forced to be drunk to spend time with his fools
                        If you get confused: Listen to the Music Play
                        Please don't Chat/PM me for help, unless mod related
                        SG-4860 24.11 | Lab VMs 2.8, 24.11

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