www.cnn.com

Stefan Schmidt s.schmidt--nanog at mcbone.net
Thu Apr 26 10:32:32 UTC 2007


On Thu, Apr 26, 2007 at 10:06:32AM +0100, Randy Bush wrote:
> roam.psg.com:/usr/home/randy> doc -p -w www.cnn.com.
> Doc-2.2.3: doc -p -w www.cnn.com.
> Doc-2.2.3: Starting test of www.cnn.com.   parent is cnn.com.
> Doc-2.2.3: Test date - Thu Apr 26 09:04:52 GMT 2007
> DIGERR (NOT_AUTHORIZED): dig @dmtns01.turner.com. for SOA of www.cnn.com. failed
> DIGERR (NOT_AUTHORIZED): dig @dmtns02.turner.com. for SOA of www.cnn.com. failed

I think your debugging tool is faulty, as a dig ns cnn.com
@a.gtld-servers.net gives:
cnn.com.                172800  IN      NS      twdns-01.ns.aol.com.
cnn.com.                172800  IN      NS      twdns-02.ns.aol.com.
cnn.com.                172800  IN      NS      twdns-03.ns.aol.com.
cnn.com.                172800  IN      NS      twdns-04.ns.aol.com.
twdns-01.ns.aol.com.    172800  IN      A       149.174.213.151
twdns-02.ns.aol.com.    172800  IN      A       152.163.239.216
twdns-03.ns.aol.com.    172800  IN      A       207.200.73.85
twdns-04.ns.aol.com.    172800  IN      A       64.12.147.120
All of the above answer to me and have the same serial for cnn.com.
I guess your tool probably asks a faulty caching nameserver for the NS
records of cnn.com - there are several misguided implementations that
cache for a longer period than the TTL of the record states.

Having said that and beeing a hostmaster for a large german broadband
ISP i am indeed quite thankful for Microsoft ignoring low TTLs in most
Windows XP installations especially as todays drones do no seem to care
about asking proper IN MX questions. ;-)

	Stefan
-- 
My software never has bugs. It just develops random features.



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