DHCP + Mac address

tiger3090 · 12-07-2004, 03:34 AM

Hi,

I've just setup 2 dhcp-servers. Everything works fine. But now i want to secure a little bit. I have a list (text-file) with all mac-addresses of our organization.

Is it possible to setup the dhcp-server that only the addresses in the list get an ip-address (not a fixed one by dhcp).

The system is RH Linux 3.0 ES with dhcp-server 3 (i thought).

Kind Regards,

Michiel

acid_kewpie · 12-07-2004, 08:13 AM

basically you only want known systems to be given an address, but that address doesn't need to be static or anything?

define a group in bind:

Code:

       group {
         host ncd1 { hardware ethernet 0:c0:c3:11:90:23; }
         host ncd4 { hardware ethernet 0:c0:c3:91:a7:8; }
         host ncd8 { hardware ethernet 0:c0:c3:cc:a:8f; }
       }

and then in your address pool, set "deny unknown clients"

Code:

pool {
           option domain-name-servers ns1.example.com, ns2.example.com;
           max-lease-time 28800;
           range 10.0.0.5 10.0.0.199;
           deny unknown clients;
         }

i believe this is basically what you are after. check the dhcpd.conf manpage for more details