dhclient & dynamic DNS updates

[Brian Reichert]

On Sat, Nov 01, 2003 at 06:34:12PM -0500, Leo Bicknell wrote:
> Best I can tell from the config this should make dhclient send a
> dynamic DNS update to the server listed as "primary" in the zone
> section adding hostname.my.example.com.  However, tcpdump shows no
> DNS update packets of any kind coming from the machine running
> dhclient.

I've never tried to make use of this feature.  The manpage for
dhclient.conf(5) says:

  "The fqdn.encoded option may need to be set to on or off, depending
  on the DHCP server you are using."

Which tells me that your client isn't sending the updates, but is
asking the DHCP server to send the updates, which obviously depends
on who's DHCP server you're talking to.

The dhclient.conf(5) does go on the describe a method of doing DNS
updates in the DHCP client script.

Myself, I've configured my DHCP server to honor 'send host-name'
directives, and update my nameservers.  That way, even the most
unsophisticated DHCP clients (re: Windows boxes) can make use of
my infrastructure...

> -- 
>        Leo Bicknell - bicknell at ufp.org - CCIE 3440
>         PGP keys at http://www.ufp.org/~bicknell/
> Read TMBG List - tmbg-list-request at tmbg.org, www.tmbg.org

-- 
Brian 'you Bastard' Reichert		<reichert at numachi.com>
37 Crystal Ave. #303			Daytime number: (603) 434-6842
Derry NH 03038-1713 USA			BSD admin/developer at large