> From: André Warnier [mailto:a...@ice-sa.com] 
> Subject: Re: tracing port to port
> 
> how does Wireshark figure out if the contents of a packet 
> are HTTP or not ?  It must be either "heuristic" by sniffing 
> the content, or else just by the port in use ?

It does both.  The protocol determination and analysis are extremely clever; 
even for SMB work, it's way better than Microsoft's NetMon.

 - Chuck


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