Dynamic DNS problems

[Kevin Darcy]

You really shouldn't be trying to mix manual and Dynamic Update maintenance of
zonefiles. BIND's implementation of Dynamic Update pretty much assumes a
"closed system", i.e. that named is the only thing changing the zone files.
The only truly *safe* way of manually changing Dynamic Update-enabled zone
files, therefore, is to actually stop named while you're doing it (hope your
users don't mind!). And even then, you have to make sure that all of the
various files are consistent with each other, otherwise they may not be
accepted when named starts back up again.

Your only reasonable course, in my opinion, is to convert all of your
maintenance systems to Dynamic Update. I'm in the midst of such a conversion
process, so I know it's not trivial. But I think it's probably worth it in the
long run.


- Kevin

Mike Black wrote:

> I am running bind-9.0.0 and dhcp-3.0b2pl4 on Linux and got dynamic DNS
> working.
> However, I'm having problems migrating to dynamic vs static addresses.
>
> I current have all my DHCP addresses in an include file and have
> experimented with a few hosts.
>
> Keep an IN A record causes a "record exists" message.
>
> Removing the host from the DHCP static address has to wait for the dhcp
> renewal to occur.
> Meanwhile, the host can't send email because reverse lookup won't work.
> Once the renewal occurs it gets updated OK.
>
> Then, I found out that once a good dynamic address was inserted, I updated
> the serial# on my named.conf and named refused to load the journal claiming
> that it was "out of sync".
>
> #1 - Is there way to code these IP addresses in the forward and reverse
> lookup files to tell named they can be dynamically updated?
> #2 - Is there a way to dump the journal file to a forward/reverse lookup
> file that can be "re-fed" into named?  Since the journal is binary the only
> choice you have if it is wrong is to delete it.
> ________________________________________
> Michael D. Black   Principal Engineer
> mblack at csihq.com  321-676-2923,x203
> http://www.csihq.com  Computer Science Innovations
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> FAX 321-676-2355