[96270] in North American Network Operators' Group
Re: www.cnn.com
daemon@ATHENA.MIT.EDU (Stefan Schmidt)
Thu Apr 26 06:35:02 2007
Date: Thu, 26 Apr 2007 12:32:32 +0200
From: Stefan Schmidt <s.schmidt--nanog@mcbone.net>
To: Randy Bush <randy@psg.com>,
North American Network Operators Group <nanog@merit.edu>
Mail-Followup-To: Stefan Schmidt <s.schmidt--nanog@mcbone.net>,
Randy Bush <randy@psg.com>,
North American Network Operators Group <nanog@merit.edu>
In-Reply-To: <20070426102844.GL17505@giscard.mcbone.net>
Errors-To: owner-nanog@merit.edu
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.
