Re: icmp echo-requests?

["zhaol" <joe () rdsk net>]

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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