Disable the VNC HTTP server

For security and performance reasons, you may want to disable the HTTP/Java interface of VNC server. The normal VNC server process listens on port 5901, and the HTTP listener uses port 5801. You can see this echoed in the vnc log file:

vncext: VNC extension running!
vncext: Listening for VNC connections on port 5901
vncext: Listening for HTTP connections on port 5801
vncext: created VNC server for screen 0

To disable the startup of the HTTP listener, edit the /usr/bin/vncserver script, and scroll down to approximately line #138 where you will find this directive:

$cmd .= " -httpd $vncJavaFiles" if ($vncJavaFiles);

Comment out this line, and restart VNC server. You should now see only this in the log file:

vncext: VNC extension running!
vncext: Listening for VNC connections on port 5901
vncext: created VNC server for screen 0