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    New to Pfsense - DHCP Exclusion

    Scheduled Pinned Locked Moved DHCP and DNS
    14 Posts 3 Posters 5.5k Views
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    • H
      Hamooda
      last edited by

      Somplu I want to exclude these ip because it's already occupied by some printers and other devices.

      I used to do it in one step with Microsoft DHCP that's why I can't find it easy :)

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      • JKnottJ
        JKnott
        last edited by

        I assume those devices have a static address?  If so, just give them addresses outside of the DHCP address pool.  For example, you might have the pool configured for 192.168.0.100 to 192.168.0.199.  You then can give static addresses outside that range to those devices.  Or you could configure them to use DHCP and create a static mapping between the MAC address and IP address.  Either way will work fine.

        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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        • johnpozJ
          johnpoz LAYER 8 Global Moderator
          last edited by

          The devices with static IPs on your network should be outside your pool.  If you have devices inside your pool, even if the client is already set inside the pool.  And you want to be clean about it create multiple pools skipping those IPs.  But would prob just be easier to change those devices so they are not in the pool range.

          You can have multiple pools.  So for example with your .80 just create pools

          192.168.0.11-79

          Then create next pool

          192.168.0.81-99

          You can have many pools setup skipping over single IPs or ranges of IPs if your setting those clients as static.. But its much simpler and cleaner to just put your devices outside the pool.. If your pool is .11-99 then your statics could be .1 to .10 and .100 to .254 if your using a /24

          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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          • H
            Hamooda
            last edited by

            In fact I can't change some devices IP. But now I got a question, when I enabled the DHCP server I defined the range of IPs but didn't make Pools, though my DHCP still handing out IPs! So you mean if I make pool range my DHCP will pass IP from pool ranges only and not from the whole range?

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            • JKnottJ
              JKnott
              last edited by

              @Hamooda:

              In fact I can't change some devices IP. But now I got a question, when I enabled the DHCP server I defined the range of IPs but didn't make Pools, though my DHCP still handing out IPs! So you mean if I make pool range my DHCP will pass IP from pool ranges only and not from the whole range?

              All you have to specify is the available range.  You'd only use the additional pools if you needed more pools.  As for those devices you can't change, you can always create a DHCP entry for their address and use the device's MAC address.  That way, no other device can get that address.

              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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              • H
                Hamooda
                last edited by

                Thanks a lot, I will try thatbnext Sunday and will let you know. Much appreciated your advice.

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                • johnpozJ
                  johnpoz LAYER 8 Global Moderator
                  last edited by

                  "you can always create a DHCP entry for their address and use the device's MAC address."

                  No not really, you can not create a reservation for IP inside the pool.. If you mean create a dummy lease? How exactly you going to do that?

                  Why not just do the pools.. Clickity Clickity done!

                  multplepools.png
                  multplepools.png_thumb

                  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
                    last edited by

                    "you can always create a DHCP entry for their address and use the device's MAC address."

                    No not really, you can not create a reservation for IP inside the pool.

                    Sorry, forgot about that.

                    Still, I don't think I've ever seen an IP device that couldn't be configured for a specific address, if not DHCP.  However, I have seen some that were difficult to configure in that I had to manually create an arp entry and then use that IP to access the device.

                    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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                    • H
                      Hamooda
                      last edited by

                      Thanks to all, I solve it by IP reservation and used fake MAC address.

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                      • johnpozJ
                        johnpoz LAYER 8 Global Moderator
                        last edited by

                        How exactly did you do that, pfsense does not allow you to create reservations for IPs "inside" the pool range..

                        dhcpreservation.png
                        dhcpreservation.png_thumb

                        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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