Understanding cause of DNS format error (FORMERR)

Carsten Strotmann (private) cas at strotmann.de
Sun Jun 24 08:56:10 UTC 2012


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Hello,

On 6/24/12 10:07 AM, Carsten Strotmann (private) wrote:

> It might even be a new Windows 2012 DNS server, and it might be an 
> issue with this new version. This is just speculation, but if it is
> an issue with Windows 2012 DNS, it might be good to be able to
> isolate that issue soon (so that it can be fixed before Windows
> 2012 is released).

I did some tests with the release candidate version of Windows 2012,
and I could not reproduce the error. Windows 2012 internal version
number is 6.2 (6.2.8400) and it does not implement the "version.bind"
request (returns a NOTIMPL error).

However the dns11.one.microsoft.com DNS server returns

bash-3.2# dig @94.245.124.49 txt ch version.bind
;; Warning: query response not set
;; Warning: Message parser reports malformed message packet.

; <<>> DiG 9.9.1-P1 <<>> @94.245.124.49 txt ch version.bind
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 11512
;; flags: aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;version.bind.                  CH      TXT

;; ANSWER SECTION:
version.bind.           1476526080 IN   TXT     "Microsoft DNS
6.1.7601 (1DB14556)"

;; Query time: 36 msec
;; SERVER: 94.245.124.49#53(94.245.124.49)
;; WHEN: Sun Jun 24 10:26:11 2012
;; MSG SIZE  rcvd: 76

which is

Version	        Product	                Milestone	Service branch
6.1.7600.16xxx	Windows Server 2008 R2	RTM	        GDR

I'm now setting up a Windows 2008R2 DNS Server with the latest patches
in the test lab to see if I can recreate the issue.

Best regards

Carsten Strotmann

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