differences in query responses in bind4 - bind8/9

Kevin Darcy kcd at daimlerchrysler.com
Tue Jun 11 22:22:25 UTC 2002

Axel Klatt wrote:

> Hi,
> Between bind4.9 and the newer bind versions (8/9) the response to a
> nslookup-query is different when an wildcard-mx is included in the
> queried zone file.
> The difference between the answer of V4 and V8/9 is, that the V8/9
> are adding an 'authority RR' to the answer (which V4 does not).
> This leads to the problem, that nslookup does not continue to
> query on its srchpath when asking bind V8/9 servers in contrast
> to the V4 server.
> Do you know why this difference in the response was changed in the
>  newer bind versions ? I havn't found it yet searching the changelogs.
> Or do you think this might be a bug in nslookup or named?!
> Yes, I know that it is not recommeded to use wilcard-mx's and bind4 is
> deprecated...

BIND 8 and 9 are conformant to RFC 2308; BIND 4 probably isn't. If your
version of nslookup doesn't understand RFC 2308-conformant responses,
it's broken.

- Kevin

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