Clarification on question and the answer section uppercase lower case mis match

Warren Kumari warren at kumari.net
Tue Apr 10 13:26:03 UTC 2012


http://www.ietf.org/rfc/rfc4343.txt

Some resolvers use 0x20 tricks to encode additional entropy into queries.

This works by randomly adding 0x20 to characters in the qname and then making sure they are the same when they come back (e.g: example.com -> eXAmpLe.coM)...

W


On Apr 10, 2012, at 5:56 AM, rams wrote:

> Hi,
> When i queried domain with capital letters , In answer section domain name is displaying small letters. Is it expected? any RFC for this?
> 
> dig @localhost D.ashwintrail.com 
> 
> 
> ; <<>> DiG 9.2.4 <<>> @localhost D.ashwintrail.com
> ; (1 server found)
> ;; global options: printcmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 23469
> ;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 0
> 
> ;; QUESTION SECTION:
> ;D.ashwintrail.com. IN A
> 
> ;; ANSWER SECTION:
> d.ashwintrail.com. 86400 IN A 2.3.4.5
> 
> ;; AUTHORITY SECTION:
> ashwintrail.com. 86400 IN NS ramesh.com.
> ashwintrail.com. 86400 IN NS ramesh1.com.
> 
> ;; Query time: 0 msec
> ;; SERVER: #53
> ;; WHEN: Tue Apr 10 02:19:00 2012
> ;; MSG SIZE rcvd: 105
> 
> Thanks & Regards,
> Ramesh
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