How to restrict Windows XP DHCP clients to a specific subnet?

Ole Holm Nielsen Ole.H.Nielsen at
Thu Feb 13 13:42:25 UTC 2014

W.J.M. Nelis Wim.Nelis at wrote:
>>> We are experimenting with an ISC DHCP configuration to achieve the goal you
>>> describe. Currently the following seems to do the job:
>>> class "Claudus" {
>>>          match hardware ;
>>>          set client-class= "Claudus" ;
>>> }
>> I have searched in vain for the "set client-class" statement. Other
>> examples of classes I've seen don't seem to use this.
>> Question: Is "set client-class" documented anywhere, and can I safely
>> omit this?
> Yes, you can safely omit it. I've included it, as it results in an extra
> variable shown in the leases file. Thus there you can find in which class a
> client is put if you really need to know it. Sorry for the confusion: I
> should have removed this local optimisation.

Cool!  I like this, but where is the documentation of this?  Googling it 
didn't seem to give any hits...


Ole Holm Nielsen
Department of Physics, Technical University of Denmark

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