Is there a way I can assign DHCP managed IP addresses to only computers with known MAC addresses?
deny unknown-clients;
Currently, I'm giving out IP addresses to any DHCP request using:
subnet 123.456.789.0 netmask 255.255.255.0 { range 123.456.789.240 123.456.789.245; }
I only want to give out IP addresses to known computers without assigning specific IP addresses to specific MAC addresses. Our pool of known computers is bigger than our pool of IP addresses, but all the computers will never be present at the same time.
Make the lease time short, something like an hour, with:
max-lease-time 86400; default-lease-time 86400;
Now, try something like the following either after or maybe inside your "subnet" declaration:
group {
use-host-decl-names on; host adan { hardware ethernet 00:50:ba:5d:6f:2c; }
host rodolfo { hardware ethernet 00:d0:59:b7:48:41; }
}This way you are defining the known hosts but *not* assigning fixed addresses.
The above should be a guide, to be completed by consulting the man page for dhcpd.conf. It is not a complete answer since I have not needed to do what you want so I have not tested this solution.
That being said, I do deny unknown clients and I do assign fixed IP addresses to hosts adan and rodolfo by adding "fixed-address" commands inside each "host" section. So I should be close, even if I'm not exactly right.
-- Rodolfo J. Paiz rpaiz@xxxxxxxxxxxxxx http://www.simpaticus.com
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