Ethereal-users: Re: [Ethereal-users] TCP "Data" ?

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From: Guy Harris <guy@xxxxxxxxxxxx>
Date: Wed, 19 Nov 2003 13:36:48 -0800

On Nov 19, 2003, at 1:32 PM, Tony Scarola wrote:
Do you know if it is possible to simply tell Ethereal that a certain port 
maps to a specific application (i.e. port 5900 is [most likely] VNC)?
Yes. Step 1 is to write a VNC dissector. Step 2 is to make it register itself for TCP port 5900. :-)
I see that there is a "decode as" option, however, do not see any way to change or develop custom protocols for "unknown ports". I would think there 
might be an easy way for non-programmers to add custom ports.
What do you mean by "change or develop custom protocols"? Do you mean *dissect* those protocols?