openldap, dlz and dynamic dns updates from isc-dhcpd

Jeff Lasslett jeff.lasslett at
Mon Sep 24 22:19:39 UTC 2012

Hi Evan,

Thanks for your reply.  I must confess that I am working on my first
DHCP and BIND deployment and I'm sure that I don't yet understand
everything.  So it's likely that I'm working with some wrong

On 25 September 2012 04:01, Evan Hunt <each at> wrote:

> I'm not aware of such a DLZ driver existing yet, but there's no
> technical reason why it couldn't be written.

Thanks. That's useful to know,

Here's a possibly wrong assumption:  there are BIND deployments that
use openldap (or an RDBMS, or something else) rather than zone files
to hold DNS mappings (name to ip address & vice versa), and these
alternative backends are updated when the DHCP server hands out or
revokes a lease.
Is this so? If so, how is the DNS information updated?

>> Can encryption be used to dynamically update BIND's DLZs, just as it
>> can if zone files are used?
> I'm not sure what you mean by "using encryption".

:-)  I'm not sure either.  In DHCP config, within a zone { ... }
block, there are key <keyname> directives.   It seems that BIND & DHCP
can use a key to be sure of each other and the validity of DNS updates
coming from the DHCP server.   Am I on the right track?   When I wrote
'encryption' this is what I was referring to.


More information about the bind-users mailing list