[164351] in North American Network Operators' Group
Comcast using private space and trying to use pool.ntp.org
daemon@ATHENA.MIT.EDU (Mike McLaughlin)
Tue Jul 9 19:02:53 2013
From: Mike McLaughlin <obrith@gmail.com>
Date: Tue, 9 Jul 2013 16:02:21 -0700
To: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
This is a friendly note to any Comcast net admins who might be interested:
We have a Business Fiber circuit and run a public NTP server in the pool.
It seems Comcast is using private IP space (mostly 10.29.0.0/16 and
10.183.0.0/16) for equipment and are trying to use the NTP pool for time
services (without NAT). Clearly that isn't working out so hot - my firewall
logs are chalk full of requests from those two networks, so I'd assume it's
a pretty large number of misconfigured devices since I'm one of many many
pool servers - and it's fairly safe to assume they're Comcast devices since
they aren't getting eaten before hitting my firewall from Cocmast. Just for
laughs, I suspect, Comcast blocks bogons at my gateway, so I couldn't even
let them get time from me if I wanted to.
Clearly not a critical (to me) issue, but I figured it was worth passing
along since I count on Comcast for interwebs and it's likely Comcast could
see time sync issues related to this.
Sincerely,
Mike McLaughlin
