Using a DynDNS hostname in master-statement for a bind slave?

Doug Barton dougb at
Fri Jun 27 17:56:33 UTC 2014

On 06/27/2014 08:27 AM, Johannes Kastl wrote:
> The slave server (HOST B) is reachable from the internet via a dynDNS
> hostname.
> Now I want to setup another bind as slave on a server hosted at my
> provider. It should use HOST B as its master, to transfer the zone and
> act as a slave.
> BUT I found nothing in the documentation on how to deal with a master
> server that has no fixed IP and is reachable via a dynamic hostname.

That's because it cannot be done. You need a master with a fixed address.

If your zone content and IP address don't change often you could set a 
very long expire time on the zone, and fix the master definition on your 
provider's slave whenever it breaks, but that's pretty fragile.

Good luck,


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