I don't think so. The most efficient way to achieve want you want is
disabling the unused ports on the switches/hubs and implementing a
Media Access Control (cisco, hp have this feature).

Greetings
Leonardo

On Wed, 19 Jan 2005 17:29:38 -0500, Paul Aviles <paviles (at) adjoined (dot) com [email concealed]> wrote:
> I have a weird question maybe. Is there a way to prevent our DHCP from
> giving leases to computers not in our domain? I don't want anyone that
> walks in to just connect and have the possibility of a network viruses
> getting loose. Is this possible?
>
> My setup is a typical AD 2K environment, simple domain no empty root.
>
> Thanks
>
> Paul
>
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