specific ttl in a caching dns
Kevin Darcy
kcd at daimlerchrysler.com
Wed Jan 4 00:45:47 UTC 2006
Barry Margolin wrote:
>In article <do8r38$1kk9$1 at sf1.isc.org>,
> Stella Korakaki <skor at hellug.gr> wrote:
>
>
>
>>Hi all.
>>
>> I need to know if there's any to way to specify the ttl for certain
>>domains in a caching dns server.
>>For example, I see entries in my cache from dyndns.org that have ttl >
>>3 hours. So I need to configure my bind so that for every hostname at
>>dyndns.org the ttl is something less than 1 hour.
>>
>>
>
>I don't think there's a way to do it on a per-domain basis. You can
>configure the max-ttl and max-ncache-ttl options, but they affect all
>domains.
>
You can flush specific names *completely* out of the cache using rndc's
"flushname" command. Requires a very-recent version of rndc...
- Kevin
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