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I have a CentOS server with vncserver service configured. netstat tells me that Xvnc listens on 5800, 5900 and 6000 ports.

What does port 6000 do for Xvnc?

Thank you

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up vote 1 down vote accepted

That port seems to be used by the X11 graphics system

# grep 6000 /etc/services

x11 6000/tcp X # the X Window System

Maybe xvnc is using some kind of port forwarding for X11

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