See http://doc.powerdns.com/built-in-recursor.html
max-cache-ttl
Maximum number of seconds to cache an item in the DNS cache, no matter what the
original TTL specified. Available since 3.2.
"Derrik Pates" <[email protected]> schrieb:
>On 11/4/10 1:32 PM, Dmitriy Lyfar wrote:
>> Thank you. Is there any way to control TTL for resource records in
>> recursor? Sometimes I see:
>>
>> ggg.com <http://ggg.com>. 428271 IN A 212.72.60.198
>>
>> Where recursor obtains this TTL value?
>
>As I said, it gets it from the authoritative server, then counts down
>over time until it reaches the time where the record is no longer good,
>
>and it throws it away. I did a quick query for 'ggg.com', and the
>authoritative servers for it provide a TTL of 432000 seconds, so a
>little math shows that the recursor you queried last retrieved that
>record slightly over 1 hour prior. There's not a way in pdns_recursor
>to
>override what's sent out as the record TTL, but as Kenneth pointed out,
>
>there's a good reason for clients to be able to see that, so trying to
>override it is probably not a good idea in the long run.
>
>--
>Derrik Pates
>[email protected]
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