Listening tcp ports of vnc

[Juan Jose Ruiz Perez]

Hello:
I have just joined this list but I haven't found an answer for this
question in the recent history of this list. I Apologize if it was
asked before.

In the documentation of vnc (faq,..) I've read that the server is
listening in the tcp ports 58xx and 59xx. Nevertheless, the different
servers I have started, appear to be listening also in tcp ports 60xx,
what is not documented:

netstat -at:
...............
tcp        0      0 *:5801                  *:*                     LISTEN
tcp        0      0 *:5901                  *:*                     LISTEN
tcp        0      0 *:6001                  *:*                     LISTEN
...............
tcp        0      0 *:5802                  *:*			    LISTEN
tcp        0      0 *:5902                  *:*			    LISTEN
tcp        0      0 *:6002                  *:*                     LISTEN
...............

I run several vncservers behind a firewall and I don't like the idea of
having my servers listening in ports that I don't know exactly what kind
of conections are they waiting for.

Can anybody tell me something about this?
(I run vnc-3.3.3-2 for linux and windows)
Thanks.






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