ignore hosts

[Anthony R Fletcher]

We run a non-authoritative DHCP server, version 4.2.1, on a network
handing out IP addresses to certain hosts and we want to simply ignore
(and not log) the rest. My config file looks like:

# Subnet setup.
subnet 10.11.12.0 netmask 255.255.255.0
{
        option routers 10.11.12.1;
        option broadcast-address 10.11.12.255;
        option subnet-mask 255.255.255.0;

	host host1 {
		hardware ethernet 00:88:aa:43:00:8d;
		fixed-address host1; }
	}
	#..... many others ....
}


However we get lots of logs like

Dec  9 14:36:55 master dhcpd: DHCPDISCOVER from 00:22:44:d9:cd:e0 via eth0: network 10.11.12.0/24: no free leases

How can I not log these messages for certain MACs or all unknown MACs?

I've tried a bunch of things like "deny unknown-clients;" but the hosts
just try again, often, and we log them every time.

		Anthony.