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Negative Caching of DNS Queries
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Tom Halldorson
Mar 25, 2003, 9:55:03 AM3/25/03
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Windows 2000 DNS server is claimed to support RFC
2308 "Negative Caching of DNS Queries (DNS NCACHE)". The
product documentation and GUI interfaces continue to refer
to the SOA minimum field as the default TTL of RRs which
did not contain a TTL value. RFC 2308 states "TTL to be
used for negative responses, is the new defined meaning of
the SOA minimum field." This RFC also provides for a new
directive $TTL <TTL> [comment] to replace the SOA minimum
field. I can find no reference to it or to Negative
Caching in W2K docs. The question is then, how is it
really implemented in Windows 2000 DNS?
2308 "Negative Caching of DNS Queries (DNS NCACHE)". The
product documentation and GUI interfaces continue to refer
to the SOA minimum field as the default TTL of RRs which
did not contain a TTL value. RFC 2308 states "TTL to be
used for negative responses, is the new defined meaning of
the SOA minimum field." This RFC also provides for a new
directive $TTL <TTL> [comment] to replace the SOA minimum
field. I can find no reference to it or to Negative
Caching in W2K docs. The question is then, how is it
really implemented in Windows 2000 DNS?
Jeff Westhead [MS]
Mar 25, 2003, 3:30:00 PM3/25/03
to
Negative caching is implemented as per RFC. Name errors are cached for the
TTL specified in the SOA if one is known for the record in question.
TTL specified in the SOA if one is known for the record in question.
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"Tom Halldorson" <Tom.Hal...@Compass.net> wrote in message
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