Problems with DDNS

Kevin Darcy kcd at
Tue Feb 5 22:26:33 UTC 2002

Paco Orozco wrote:

> I need a hand in one of my projects.
> I've got three DNS servers, BIND 9 based and one domain
> SERVER1  is  master.  SERVER2 has got some zones. In these
> zones updates DDNS are allowed, for example SERVER3
> is slave.
> Workstations has, as a primary server SERVER1 and as secondary
> SERVER3. Servers that needs update DDNS have SERVER1 and SERVER3 too.
> My question is:
> -> Is there any feautre to be able to work this scenario (DDNS)?

By default, Dynamic Update clients will use the contents of the SOA
record (the MNAME field) and the NS records for a zone, to determine
where to send their Dynamic Updates. So as long as you have correct
information in those records, the Dynamic Updates for should go
to the master for, the Dynamic Updates for the zone should go to the master for that zone, and so

> -> How can i solve problems with inverse resolution (DDNS)?

I assume you mean reverse DNS. We'd need to know what problems you're
having with it before suggesting solutions to those problems.

- Kevin

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