From: miquels@traveler.cistron-office.nl (Miquel van Smoorenburg)
To: linux-kernel@vger.kernel.org
Subject: Re: ECN: Clearing the air (fwd)
Date: Sun, 28 Jan 2001 14:34:44 +0000 (UTC) [thread overview]
Message-ID: <951am4$gbf$1@ncc1701.cistron.net> (raw)
In-Reply-To: <Pine.GSO.4.30.0101280700580.24762-100000@shell.cyberus.ca> <Pine.SOL.4.21.0101281324210.26837-100000@yellow.csi.cam.ac.uk>
In article <Pine.SOL.4.21.0101281324210.26837-100000@yellow.csi.cam.ac.uk>,
James Sutherland <jas88@cam.ac.uk> wrote:
>On Sun, 28 Jan 2001, jamal wrote:
>> The internet is a form of organized chaos, sometimes you gotta make
>> these type of decisions to get things done. Imagine the joy _most_
>> people would get flogging all firewall admins who block all ICMP.
>
>Blocking out ICMP doesn't bother me particularly. I know they should be
>selective, but it doesn't break anything essential.
It breaks Path MTU Discovery. If you have a link somewhere in your
network (not at an endpoint, or TCP MSS will take care of it) that
has an MTU < 1500, you cannot reach hotmail and a lot of other sites
either currently. It _does_ break essential things. Daily. I would
get a lot of joy from flogging all firewall admins who block all ICMP.
Mike.
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next prev parent reply other threads:[~2001-01-28 14:34 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-28 0:14 ECN: Clearing the air (fwd) jamal
2001-01-28 8:56 ` James Sutherland
2001-01-28 12:18 ` jamal
2001-01-28 13:29 ` James Sutherland
2001-01-28 14:34 ` Miquel van Smoorenburg [this message]
2001-01-28 16:44 ` James Sutherland
2001-01-29 7:32 ` David S. Miller
2001-01-29 12:30 ` Andi Kleen
2001-01-29 18:31 ` Albert D. Cahalan
2001-01-29 19:02 ` James H. Cloos Jr.
2001-01-29 19:27 ` George
2001-01-29 19:59 ` Alex Pennace
2001-01-28 14:54 ` Andi Kleen
2001-01-28 16:15 ` jamal
2001-01-28 17:11 ` James Sutherland
2001-01-28 18:07 ` jamal
2001-01-28 20:13 ` Gregory Maxwell
2001-01-29 2:58 ` David Lang
2001-01-29 7:20 ` David S. Miller
2001-01-28 19:42 ` Gregory Maxwell
2001-01-29 0:14 ` Jamie Lokier
2001-01-31 18:02 ` Alan Cox
2001-02-03 16:51 ` Michael H. Warfield
2001-01-29 12:57 ` Peter Samuelson
2001-01-28 17:39 ` Rogier Wolff
2001-01-28 18:01 ` Graham Murray
2001-01-28 18:08 ` jamal
2001-01-28 18:23 ` Rogier Wolff
2001-01-28 18:38 ` jamal
2001-01-28 20:18 ` Gregory Maxwell
2001-01-28 21:33 ` ECN fixes for Cisco gear Dax Kelson
2001-01-28 22:09 ` ECN connectivity surveys Dax Kelson
2001-01-28 21:45 ` ECN fixes for Cisco gear Lincoln Dale
2001-01-28 14:04 ` ECN: Clearing the air (fwd) Ben Ford
2001-01-28 14:09 ` James Sutherland
2001-01-28 15:38 ` Ben Ford
2001-01-28 19:55 ` Gregory Maxwell
2001-01-28 19:45 ` Gregory Maxwell
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