Name server changes TTL

Kevin Darcy kcd at daimlerchrysler.com
Thu Dec 18 17:52:18 UTC 2003


Albert wrote:

>I'm new to this group and I'm not sure where to post this question so
>I apologize if this is not the right place and could someone indicate
>where I could get help. Thanks.
>
>We have a DNS server running BIND 9.2.1 under Red Hat Linux 7.2 and we
>get the following situation which apparently is a problem for some of
>our users.
>
>When trying to resolve a non-existing name, for example,
>"www.no-such-domain-123abc.org", our DNS server gets an answer from
>the authoritative server tld1.ultradns.net, but apparently, it then
>changes the Time To Live of the returned SOA record in the Authority
>section to a value smaller than the Minimum Time To Live of that SOA
>record.
>
>Is this normal behaviour? Can it be modified?
>
>I'd really appreciate any help you can provide. Thanks.
>
That SOA RR is really a negative caching record. See RFC 2308 for more 
details.

                                                                         
                                 - Kevin





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