Error "Query section mismatch : got"

[Matus UHLAR - fantomas]

On 19.08.20 17:40, Smile TV wrote:
>    I query the PTR Resource Record that is hosted on DNS Server/
>115.84.177.8 (reverse zone: 250.0-24.199.212.125.in-addr.arpa). However,
>There is a difference between when querying directly the PTR RR and
>querying Any RR.
>    The results of two case below:
>*Case 1: Query the PTR RR directly, i meet the error: "Question section
>mismatch" like:*
>
> dig @115.84.177.8 250.0-24.199.212.125.in-addr.arpa ptr
>;; Question section mismatch: got 255.0.199.212.in-addr.arpa/PTR/IN
>;; Question section mismatch: got 255.0.199.212.in-addr.arpa/PTR/IN
>;; Question section mismatch: got 255.0.199.212.in-addr.arpa/PTR/IN


>What is the error "Query section mismatch"? and the why? Can anybody help
>me!

you asked for:
250.0-24.199.212.125.in-addr.arpa 
but got:
255.0.199.212.in-addr.arpa

that's different therefore the mismatch.


Why do you query for 250.0-24.199.212.125.in-addr.arpa by the way?


>*Case 2: Query Any RR, the result like here*
>
> dig @115.84.177.8 250.0-24.199.212.125.in-addr.arpa any
>
>; <<>> DiG 9.10.4-P3 <<>> @115.84.177.8 250.0-24.199.212.125.in-addr.arpa
>any
>; (1 server found)
>;; global options: +cmd
>;; Got answer:
>;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 12424
>;; flags: qr aa rd; QUERY: 1, ANSWER: 2, AUTHORITY: 3, ADDITIONAL: 21
>;; WARNING: recursion requested but not available
>
>;; QUESTION SECTION:
>;250.0-24.199.212.125.in-addr.arpa. IN  ANY
>
>;; ANSWER SECTION:
>250.0-24.199.212.125.in-addr.arpa. 360 IN PTR   smtp.vss.gov.vn.
>250.0-24.199.212.125.in-addr.arpa. 360 IN PTR   baohiemxahoi.gov.vn.
>
>;; AUTHORITY SECTION:
>199.212.125.in-addr.arpa. 360   IN      NS      ns.viettelidc.com.vn.
>199.212.125.in-addr.arpa. 360   IN      NS      ns1.viettelidc.com.vn.
>199.212.125.in-addr.arpa. 360   IN      NS      ns2.viettelidc.com.vn.


I got the same results for both queries, but UDP is allowed while TCP is
refused.
- no matter if I ask for any or for ptr.

seems that default for 'any' is TCP, while for 'ptr' the default is UDP.

TCP is required for working DNS - they should not block it.


again, why you query for 250.0-24.199.212.125.in-addr.arpa ?

under normal circumstances there's no point of querying that name.


there


-- 
Matus UHLAR - fantomas, uhlar at fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
Microsoft dick is soft to do no harm