(E-Mail Removed) wrote:
> Hi all!
>
> Would some please explain to me why Microsoft's DNS Cache Resolver has
> it's own built in TTL defaulting to 86400 (24 hours) instead of paying
> attention to the TTL that the domain's name server reports? This is
> very frustrating to me. We set our TTLs on our domains in BIND to be
> 3600 (1 hour) so we can change our records and it get updated quickly.
> However, Windows caches names for a day without regard to that
> setting. It seems that since Windows being as ubiquitous as it is,
> the TTL setting on an SOA record is meaningless.
>
> I'm not just griping; I am truly hoping that I am wrong and someone
> will set me straight. I would ultimately like to have control over how
> long a client caches my domain's IP but it seems like Windows
> overrides me. Thanks for any input!
MS DNS is not supposed to cache longer than the TTL of the record, there was
a problem in Win2k that was fixed with SP3.
BTW, without adding a machcachettl value to the registry, the maximum cache
time is 1 day.
DNS Server Caches NS Records Longer Than the TTL
http://support.microsoft.com/kb/303964/en-us
--
Best regards,
Kevin D. Goodknecht Sr. [MVP]
Hope This Helps
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