[41654] in North American Network Operators' Group
Re: World Trade Center attack
daemon@ATHENA.MIT.EDU (Sean Donelan)
Tue Sep 11 20:17:48 2001
Date: 11 Sep 2001 13:42:32 -0700
Message-ID: <20010911204232.1701.cpmta@c011.snv.cp.net>
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To: woody@zocalo.net
From: Sean Donelan <sean@donelan.com>
Cc: nanog@merit.edu
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Errors-To: owner-nanog-outgoing@merit.edu
On Tue, 11 September 2001, Bill Woodcock wrote:
> FWIW, I'm getting the voice-telco equivalent of an ICMP
> administratively-prohibited when trying to place voice calls from San
> Francisco to Moscow on AT&T LD. I'm curious whether this is a generalized
> policy or whether I'm just encountering a specific failure with a
> mis-matched error message.
Network Management Controls (i.e. call gapping) seem to be in effect for
most international destinations. I don't think all calls are blocked, just
1 in N are getting a blocked recording on the first switch instead of going
through the entire network. Sometimes if you use a different carrier
(10-10-xxx) you'll get around the NMC.
