Dynamic DNS question and update forwarding

[Kevin Darcy]

The source address of the forwarded update will be whatever interface the packet
was sent from on 10.0.0.3. Note that this might *not* be 10.0.0.3 if the box is
multihomed (in fact you might even be able to play some ugly tricks using virtual
interfaces if you really had to).

Why bother with update forwarding at all? Why not have the domain controller update
the master directly?


- Kevin

lawrence.a.kravets at us.andersen.com wrote:

> Okay quick question.
>
> Here is my environment:
>
> Two DNS servers Bind 9.1.2 and 1 Windows 2000 Domain Controller.
>
> 10.0.0.2 DNS Server 1 Master for      ad.zone.com  <- this zone is enabled for
> dynamic dns and only allows ip addresses 10.0.0.2 and 10.0.0.3 to update
>
> 10.0.0.3 DNS Server 2 Slave for        ad.zone.com  <-update forwarding turned
> on to pointing to its master.
>
> 10.0.0.4 Windows 2000 Domain Controller  <-its dns server that it points to
> 10.0.0.3
>
> Okay here is my question.  The domain controller tries to do DDNS with DNS
> server 10.0.0.3. DNS server 10.0.0.3 is not master for the ad.zone.com domain,
> but it knows to forward DDNS requests to DNS Server 10.0.0.2.  What is the
> source address that 10.0.0.2 receives?  Does 10.0.0.3 get the request and then
> it try's to register 10.0.0.4 for it?  How does this scenario work?
>
> Thanks,
>
> Larry
>
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