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

José Queiroz zekkerj at
Fri Feb 14 15:16:44 UTC 2014

2014-01-31 11:09 GMT-02:00 Ole Holm Nielsen <Ole.H.Nielsen at>:

> We run the ISC DCHP version 4.1.1 server that comes with Red Hat RHEL 6.5
> Linux.  We grant DHCP leases only to known hosts, and we have files with
> declarations of host names and their MAC addresses to achieve this.
> We have a new challenge because we want to restrict all Windows XP PCs
> (and we know who they are :-) to a specific VLAN subnet, where we want to
> impose strict firewall rules.  If a user connects his XP PC to any other
> VLAN subnet, the DHCP server must ignore this client.

Just in a rhetoric question... if one of these machines get booted in a
different OS, like Linux or even Windows 7, should DHCPD treat it
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