clarification on SOA

[Matus UHLAR - fantomas]

On 01.12.10 19:05, rams wrote:
> I have one SOA record as follows in zone.
> 
> qa.com.   86400   IN SOA ramesh.com. qa.com. (
>                     2009111903 ; serial
>                     10800      ; refresh (3 hours)
>                     3600       ; retry (1 hour)
>                     2592000    ; expire (4 weeks 2 days)
>                     300      ; minimum (1 day)
>                     )
> 
> I queried for non exist domain against bind. Bind is returning SOA record
> with 300 as TTL value. Is it correct? Because in my zone , SOA has 86400
> TTL.

it's correct, in case of NXDOMAIN responses, the TTL is set to value of SOA
minimum, which is 300 in this case.

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