On Sun, 19 Aug 2007 23:00:46 +1000
"Paul (NCC/CS.)" <pts@bom.gov.au> wrote:

> 
> Thanks.
> Looks pretty complicated. 
> I know that no cryptic keys are required on the work network.
> Just this:
> send host-name "laddy"; 
> and it works.
> 
The scheme I pointed out is client-based, not server-based.  That is,
my laptop can register its name to my name server no matter what
network it visits, when I have no control over the dhcp server.  For
situations like that, some security is essential or random other people
could add, modify, and delete names from my zone.

I haven't tried what you want to do, but there is some text in
dhcpd.conf(5) on dynamic dns update.

		--Steve Bellovin, http://www.cs.columbia.edu/~smb