From mboxrd@z Thu Jan  1 00:00:00 1970
From: Gabriel <jarod125@yahoo.com>
Subject: Re: ICMP packets
Date: Tue, 20 Sep 2005 07:30:43 -0700 (PDT)
Message-ID: <20050920143043.418.qmail@web60917.mail.yahoo.com>
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--- P theodorou <props666999@hotmail.com> wrote:

> Im new into iptables world
> 
> now regarding icmp packets . Is it
> applicable to drop inbound echo requests (so otherts
> cannot see me )
> 
> but i will be able to send  icmo echo request to WEB and
> receive
> replies too .
> 
> Sorry if it looks very basic but im confused
> 
> Thanks

This rule should do the trick:
iptables -A OUTPUT -p icmp --icmp-type echo-reply -j DROP

It won't allow outgoing echo replies (pongs), but will
allow outgoing echo requests (pings) and their replies.

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