Minimum TTL?

Michelle Konzack linux4michelle at
Thu Feb 8 10:44:23 UTC 2018

Thankyou for clarification...

Am DATE hackte AUTHOR in die Tasten: Karol Augustin
> On 2018-02-08 10:10, Michelle Konzack wrote:
>> Hi,
>> Am 2018-02-08 hackte LuKreme in die Tasten:
>>> Is it possible to tell bind to ignore very short TTLs and enforce
>>> a...say... 5 second minimum TTL?
>> 5 sec minimum?
>> What Du you mean with ignoring?
>> It is you YOU have to configure Bind9 correctly to longer TTLs.
>> If the NS Entry is not a Dyn-DNS entry,
>> it should have anyway at least 3600 seconds.
> This situation is relevant if bind is acting as recursive DNS server and
> upstream record has very short TTL. In that case the record is not kept
> cached for longer than 5 seconds and it might be not optimal if this
> record is looked up frequently. Some recursive servers have an option to
> set minimum TTL and thus overwrite upstream TTL for such records with
> some minimal value (like 90s for example).
> It has nothing to do with the authoritative mode when yo set up TTL for
> zones locally hosted.
> k.

Michelle Konzack        Miila ITSystems @ TDnet
GNU/Linux Developer     00372-54541400

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