[cifs-protocol] Question about MS DNS behavior regarding DNS packets containing multiple questions

Tom Jebo tomjebo at microsoft.com
Thu Sep 29 07:24:14 MDT 2011

Hi Kai,

Thanks for this question about FORMERROR and Microsoft DNS server not following RFC 1035.   One of the Open Specifications team will contact you shortly to assist. 

Best regards,
Tom Jebo
Escalation Engineer
Microsoft Open Specifications

-----Original Message-----
From: Kai Blin [mailto:kai at samba.org] 
Sent: Thursday, September 29, 2011 1:05 AM
To: Interoperability Documentation Help; pfif at tridgell.net; cifs-protocol at samba.org
Subject: Question about MS DNS behavior regarding DNS packets containing multiple questions

Hash: SHA1

Hi folks,

I've stumbled over the MS DNS server not quite following the behavior described in RFC 1035 with regards to the number of questions it will allow in the question section.

RFC 1035 states:

4.1.2. Question section format

The question section is used to carry the "question" in most queries, i.e., the parameters that define what is being asked.  The section contains QDCOUNT (usually 1) entries, each of the following format [...]

However, the Microsoft DNS server seems to give back a FORMERROR error code if I specify more than one question. Can I get clarification on where this behavior is documented?


- --
Kai Blin
Worldforge developer http://www.worldforge.org/ Wine developer http://wiki.winehq.org/KaiBlin Samba team member http://www.samba.org/samba/team/ -----BEGIN PGP SIGNATURE-----
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