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Re: icmp echo-requests?
From: "zhaol" <joe () rdsk net>
Date: Mon, 25 Nov 2002 11:39:27 +0800

IMHO, some scanners use ping to test if the scanning applicable before they
start scanning.  FYI.

----- Original Message ----- 
From: "JR" <jr () secureity de>
To: <security-basics () securityfocus com>
Sent: Wednesday, November 20, 2002 4:21 PM
Subject: icmp echo-requests?


Hi everyone,

in my firewall logs I see a lot of echo-requests within the internal network. Of course, the simplest answer to these 
events is that pings are causing these events. But on these machines definitely no pings are startet to that times. 
Is it possible that other kind of programs  are using echo-requests? What kind of programs are using echo-requests 
and why? Checking wether the other host ist up? What if the firewall is filtering echo-requests? The program would 
think that the host is down...

Greetings!
JR


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