nsupdate for default TTL

[Feng He]

Hi

Is there a way to dynamic update the zone's default TTL by nsupdate?

Thanks and Merry Xmas!

[Carsten Strotmann]

Hello Feng He,

Feng He <fen...@nsbeta.info> writes:

> Is there a way to dynamic update the zone's default TTL by nsupdate?

A default TTL (example $TTL 3600) is a property of a zone file on disk,
it is a control statement read by the BIND name server when loading the
zone file.

The default TTL is applied to all resource records that do not have a
dedicated TTL defined. After loading the zone, every resource record
will have a dedicated TTL and there is no "default TTL" in a loaded zone
(in memory).

Because there is no concept of a "default TTL" in a loaded zone, you
can only change the dedicated TTLs on each individual resource record
using the "nsupdate" tool.

Best regards and a good new year!

Carsten Strotmann

[Feng He]

锟斤拷 2012-12-26 22:12, Carsten Strotmann 写锟斤拷:

> Because there is no concept of a "default TTL" in a loaded zone, you
> can only change the dedicated TTLs on each individual resource record
> using the "nsupdate" tool.

Thanks Carsten.
Happy new year!