Dynamic DNS on Secondard Nameserver

[Kevin Darcy]

Thomas B wrote:

> Is it possible to allow Dynamic DNS on a secondary nameserver?

No. By definition, a "secondary" nameserver (that's old terminology, by the
way; they're called "slave" nameservers now) just gets a copy of the zone in
question from the master. If you allowed Dynamic Update on a slave, then
those updates would be wiped out with every refresh. This is why the Dynamic
Update RFC specifies that slaves should *forward* Dynamic Update requests to
their master. This is supposedly implemented in BIND 9.

You could, of course, define multiple boxes as masters and have them somehow
arbitrate between themselves which Dynamic Updates take precedence, when the
inevitable data conflicts arise. But you'd have to code this
"arbitration" logic yourself. BIND has no such facility.


- Kevin