From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Dick St.Peters" <stpeters@NetHeaven.com>
Subject: Re: SSH Connections Lost After 1 minute idle
Date: Tue, 13 Jul 2004 17:55:29 -0400
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	<200407132218.06134.Antony@Soft-Solutions.co.uk>
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Antony Stone writes:
> On Tuesday 13 July 2004 9:57 pm, Real Cucumber wrote:
> 
> > Why should ICMP not be completely blocked? The machine
> > is used strictly as a port forwarding firewall/router.
> 
> Because blocking all ICMP will break networking.   Look up the RFCs explaining 
> what ICMP is for if you do not understand this.

I would like to second this vigorously, although I would phrase it
differently: blocking ICMP makes networks fragile.  Fragile networks
break easily when anything out of the ordinary happens.

--
Dick St.Peters, stpeters@NetHeaven.com