[61914] in North American Network Operators' Group
Re: Networks dropping all ICMP
daemon@ATHENA.MIT.EDU (Greg Maxwell)
Tue Sep 9 13:53:53 2003
Date: Tue, 9 Sep 2003 13:28:05 -0400 (EDT)
From: Greg Maxwell <gmaxwell@martin.fl.us>
To: Andrew Staples <andrews@ltinet.net>
Cc: <nanog@merit.edu>
In-Reply-To: <248F3F0B2C31F84CB376D24C6E6691320855C3@vulture.vanc.nwnetcom>
Errors-To: owner-nanog-outgoing@merit.edu
On Tue, 9 Sep 2003, Andrew Staples wrote:
> A certain network last week decided to drop *all* icmp traffic across its
> network for an indefinate period of time. They did this to reduce the
> effects of Nachi. Apparently (their) Redback DSL concentrators cannot
> filter only 92 byte packets, it's all or none.
> Does anyone else care to respond publicly or privately with data about other
> networks filtering all icmp traffic, not just malformed icmp? I'd like to
> compile a list for troubleshooting, as these decisions are breaking things
> for some customers.
All? As in ... breaking path mtu discovery?
