[159628] in North American Network Operators' Group
Re: Intermittent incorrect DNS resolution?
daemon@ATHENA.MIT.EDU (William Herrin)
Wed Jan 16 17:39:14 2013
In-Reply-To: <50F722FD.7010201@uberflip.com>
From: William Herrin <bill@herrin.us>
Date: Wed, 16 Jan 2013 17:34:38 -0500
To: Erik Levinson <erik.levinson@uberflip.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Wed, Jan 16, 2013 at 5:00 PM, Erik Levinson
<erik.levinson@uberflip.com> wrote:
> I suspect that somewhere, one of their servers has the wrong data, or
> some resolver is misbehaving, but based on the
> pattern/traffic/volume/randomization of hostnames, the resolver theory is
> less likely. I haven't analyzed the source IPs yet to see if they're in a
> particular set of countries.
Hi Erik,
Look up "DNS pinning." I can't rule out the possibility of a faulty
DNS server but it's far more likely your customers' web browsers are
simply ignoring the DNS TTL. Malfunctioning as designed. If you keep
it live, you'll notice a falling trickle of traffic to the old address
for the next year or so.
Regards,
Bill Herrin
--
William D. Herrin ................ herrin@dirtside.com bill@herrin.us
3005 Crane Dr. ...................... Web: <http://bill.herrin.us/>
Falls Church, VA 22042-3004
