nanog mailing list archives

Re: enom/name-services.com nameservers are severe broken


From: Matthew Sullivan <matthew () sorbs net>
Date: Wed, 09 Mar 2005 21:48:09 +1000


Michael Tokarev wrote:

And this is Very Wrong (tm):

$ host -t cname -v name-services.com. dns1.name-services.com.
Host name-services.com not found: 3(NXDOMAIN)

In short: for *some* types of records for a valid name, the server
returns NXDOMAIN, which it should not be.

Obviously, when doing this query using a caching nameserver, the
cache gets poisoned (remembering that the domain in question
does not exists, as opposed to "No data of requested type"
response).

Another example for a domain hosted by them:


And as an example of the issue:

$ host -t ns name-services.com.
name-services.com name server dns4.name-services.com.
name-services.com name server dns5.name-services.com.
name-services.com name server dns1.name-services.com.
name-services.com name server dns2.name-services.com.
name-services.com name server dns3.name-services.com.
$ host -t cname name-services.com.
Host name-services.com not found: 3(NXDOMAIN)
$ host -t ns name-services.com.
Host name-services.com not found: 3(NXDOMAIN)


Regards,

Mat


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