[dns-operations] A lot of CNAME queries for domain ?

Simon Munton Simon.Munton at CommunityDNS.net
Thu Jul 5 16:43:14 UTC 2012

That sounds odd to me as CNAME records are not normally ever 
specifically queried (asked) for.

Where they exist, they are given as reply to a query for any RR type, 
but the CNAME itself is then followed by the resolver until an answer is 


authority => www IN CNAME web1

query     => www/IN/A

reply     => www IN CNAME web1

You don't actually ask for the CNAME, in that respect its similar to a 
wildcard. In my little example, we asked for an "A" records, but were 
given the CNAME.

On 05/07/2012 15:32, Mohamed Lrhazi wrote:
> Hello all,
> If this is not an appropriate question for the list, please accept
> my apologies and please suggest a better one.
> I just started administering DNS for my organisation and I notice in the
> query logs a lot of queries of type CNAME for our domain, say,
> example.com <http://example.com>
> We do not have such a record and so these queries get an empty answer.
> I am just curious what applications out there would be generating such
> queries... Please note that we do have an MX record for the domain and
> also an A record.
> Thanks a lot,
> Mohamed.
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