Wireshark · Ethereal-users: Re: [Ethereal-users] File Sharing and Media Protocols

[Guy Harris <guy@xxxxxxxxxx>]

On Mon, Feb 24, 2003 at 02:44:23PM -0800, Fardid, Reza wrote:
> These peer-to-peer protocols use registered ports.
> Therefore; no reverese engineering is required.

Reverse engineering is not required only if a protocol is fully and
publicly documented (or if the person writing the dissector has
non-public documentation *AND* permission to publicly release GPLed
software that dissects the protocol if it's written using that
non-public documentation).

It has nothing to do with whether the port is in some sense
"registered".