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
--
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Microsoft dick is soft to do no harm
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