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    Serving nonstandard dhcp values

    DHCP and DNS
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    • P
      pcatiprodotnet
      last edited by

      Although my interface IP/Netmask may be large, such as 10.0.0.0/8 … I want to DHCP to serve a more constrained range and netmask on this interface, such as 10.130.1.0/24 ... is this possible?  If so, how would I set it up?
      Thanks, -pc

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      • S
        sullrich
        last edited by

        No, this is not currently possible.

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        • P
          pcatiprodotnet
          last edited by

          Since the dhcp server is simply transmitting data fields (ip,netmask,gateway,dns,etc) out to clients.  If the dhcpd server developers took it upon themselves to unnecessary code in non-required restrictions as to the content of the data (ie. netmask), well that just seems daft.  If this is actually the case, I imagine that silly netmask validation routine could easily be commented out of dhcpd source.

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          • S
            sullrich
            last edited by

            @pcatiprodotnet:

            Since the dhcp server is simply transmitting data fields (ip,netmask,gateway,dns,etc) out to clients.  If the dhcpd server developers took it upon themselves to unnecessary code in non-required restrictions as to the content of the data (ie. netmask), well that's just seems daft.  If this is actually the case, I imagine that silly netmask validation routine could easily be commented out of dhcpd source.

            Its possible but pfSense does not support it.

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            • P
              pcatiprodotnet
              last edited by

              To verify, if my Interface IP/Netmask is "10.130.1.1/13" then the following dhcpd.conf entry for that interface would not work?

              subnet 10.130.1.0 netmask 255.255.255.0 {
                  range 10.130.1.10 10.130.1.254;
                      option subnet-mask 255.255.255.0;
                      option broadcast-address 10.130.1.255;
                      option routers 10.130.1.1;
                      option domain-name-servers 10.130.1.1;
                      option domain-name "domain.com";
                      option ip-forwarding on;
                      option netbios-node-type 8;
                  }

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              • J
                jeroen234
                last edited by

                subnet on the client interface and the server interface need to be the same

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                • P
                  pcatiprodotnet
                  last edited by

                  Ah, corrected a typo, the interface IP is now specified as desired above.

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