Re: DHCP server - map to host names?
From: Devin L. Ganger (devin@thecabal.org)
Date: 04/24/03
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From: "Devin L. Ganger" <devin@thecabal.org> Date: Thu, 24 Apr 2003 00:33:38 -0000
On Tue, 22 Apr 2003 10:26:26 +0100, John Howells
<John.Howells@marconi.com> wrote:
> But this does assume that (a) it is possible and allowed to edit each
> client appropriately, and (b) that all the clients allow this. In some
> ways having to edit each client negates some of the point of DHCP, since
> if you are going to edit each client you might as well give it its IP
> address anyway, though clearly using DHCP then makes it is possible to
> change the address more easily if the need should ever arise.
An elegant solution I've seen was to auto-register new machines on the
network. Connecting a brand new machine gave you an address in
an-otherwise unused IP subnet, where all web connections would be
re-directed to a registration server. Fill in a short form, including
hostname, and you'd receive a little configuration blurb to drop in
place. Subsequent reboots used the custom client ID and gave you an IP
on the real interior network. The best of these I saw used the item's
inventory control ID as the client ID; there was a separate web page
for registering changed hostnames, that tied into DDNS and looked up
the inventory control tag in the DHCP lease database.
Even though using the custom client ID does require touching the
individual machine (unless you're using drive imaging combined with
some custom utility that can use an automated variant of the above
procedure), you generally don't have to change hostnames nearly as
often as you do other information. Having DHCP still gives you the
benefit of being able to easily propagate changes to gateways, DNS
servers, and more. It's worth the hassle, especially in a large
enterprise, which already incorporates drive imaging and auto-config
technology just to control their machine rollouts.
-- Devin L. Ganger <devin@thecabal.org> "Aikido is based around the central precept of letting an attack take its natural course. You, of course, don't want to impede that natural flow by being in its way." -- overheard on the PyraMOO
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