Dynamic Updates : filter hostnames

[Kevin Darcy]

kriskaido at gmail.com wrote:

>Hi Gregory, thanks for your reply.
>The problem here is that I can't control the process in which the
>updates are done. All I have is control on my BIND installation.
>
>I think you didn't understood me well. I was not talking about
>duplicate IP addresses, and I can confirm there's no duplicate IP
>address in my context here, all I said was when you have a PC which
>boots and receives an IP address dynamically through DHCP, this address
>may have been registered by another PC (which is of course down now,
>otherwise the lease wouldn't be free) 2 days ago, so the IP is free,
>BUT the name of that 2-days-old PC is still in the DNS ! That's my
>problem, I'd like to force the update of the single name there is for
>each IP, as I'm sure that if that PC wants to update the DNS for that
>IP, it means that the current entry in the zone file is deprecated and
>can be replaced by the new one (which may be the same, why not ...)
>
>In short, I know it's legal to have aliases in DNS, but is it possible
>to change that behaviour and control what and how the updates are done
>in this or that zone ?
>
No, BIND does not have this capability.

Isn't this really the responsibility of the DHCP server, to keep track 
of what it's written to DNS? BIND is basically just a specialized 
database server, in this context. Database servers don't generally get 
involved in the decisions of whether the data makes sense or not.

                                                                         
                                 - Kevin