nanog mailing list archives

Re: nxdomain rfc2308 type 2, but authority is incorrect


From: William Herrin <bill () herrin us>
Date: Wed, 10 Aug 2016 18:50:11 -0400

On Wed, Aug 10, 2016 at 3:27 PM, Joe Maimon <jmaimon () ttec com> wrote:
William Herrin wrote:
On Wed, Aug 10, 2016 at 2:05 PM, Joe Maimon <jmaimon () ttec com> wrote:
www.kissimmee.org
Windows 2008 dns cannot resolve it.

I notice that the nameresolve.com servers returning the CNAME to
kissimmee-fl.vts.hosting are also returning an SOA record for
"hosting" in the authority section which looks very strange to me.
Perhaps Windows is rejecting it as an invalid, possibly dangerous
response packet?

I think that provided SOA record is a "local" or "alternate" version and its
existence is why the nxdomain response is being sent to the windows dns
server that accepts it at face value (but does not appear to store it in
cache, so this is not precisely cache poisoning)

Oh! I missed that. ns*.nameresolve.com, the authoratative name servers
for kissimmee.org, are saying NXDOMAIN for www.kissimmee.org. Any idea
what DNS server nameresolve.com uses? Because that's... wow.

-Bill

-- 
William Herrin ................ herrin () dirtside com  bill () herrin us
Owner, Dirtside Systems ......... Web: <http://www.dirtside.com/>


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