authorized MAC addresses

Randy Grimshaw rgrimsha at
Wed Jun 7 01:29:08 UTC 2006

We use known_hosts to separate normal configs from a private
We use subclass to identify special pools such quarantine and teaching
within known_hosts we use groupings to coordinate other special configs
such as AD participation.
Many clients recieve both static and dynamic entries.


<><Randall Grimshaw
Room 203 Machinery Hall
Syracuse University
Syracuse, NY   13244
rgrimsha at
>>> David_Hankins at 06/06/06 14:05 PM >>>
On Tue, Jun 06, 2006 at 01:37:51PM -0400, Douglas Sterner wrote:
> I've been googling the archives and the web looking for a way to 
> accomplish the following:
> I have three DHCP servers on three seperate WAN segments. I would like
> have a central MAC address server for the allocation of DHCP
addresses. If 
> the MAC is in the database give it an address otherwise give it
nothing or 
> give it another network. Has anyone set this up? We have a problem
> unkown pc's showing up on the network. Using Suse ES9 SP1

See 'man dhcpd.conf', search forward for the section titled SUBCLASSES.

The example is what you're asking for.

David W. Hankins  "If you don't do it right the first time,
Software Engineer   you'll just have to do it again."
Internet Systems Consortium, Inc.  -- Jack T. Hankins

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