Re: Sniffer Question

From: Reinhold Fischer (Reinhold.Fischer@xxxxxxx)
Date: Wed Nov 07 2001 - 13:23:15 GMT-3


   
Hi,

example:
imagine what happens if host A tries to connect to port 80 (WWW) of host B
and there is no Webserver running at all on host B ? The IP-Stack of host B
will send a 'ICMP port unreachable' message back to host A. If you try
it from a commandline (telnet to host B port 80) you usually get a 'connection
refused' message. This is the more readable interpretation of the 'ICMP port
unreachable' message to the user.

hth

Reinhold

(43 days left to brussels)

On Wed, 7 Nov 2001, Wright, Jeremy wrote:

> I am tracing on a specific user and in the expert (station layer) I am
> getting a bunch of ICMP port unreachables. The user is using email, the web,
> and connecting to network drives but no pinging. Anybody have any experience
> with this same problem? Thanks



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