It depends on the OS but the basic idea is to overflow the number so it will
wrap around and start back at zero.  On my machine, setting the port to
65616 will let vnc listen on port 80.  65557 will get you at port 21.  The
max value of a word wich is four bytes is FFFF or 65535.


Jake Hoover

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On
Behalf Of slaman *
Sent: Wednesday, July 10, 2002 12:05 PM
To: [EMAIL PROTECTED]
Subject: VNC Server Port


Hi,

I've searched many many hours for this and cannot find an answer anywhere.
I'll explain my situation to begin:

I am running a VNC server at home off a cable modem.  I want to be able to
access this server from work.  The problem occurs because my work has a
firewall that blocks all outgoing ports except for standard service ones.  I
can FTP out using port 21 and I'm sure port 80 is available because I can
access websites.  Port 5190 is also open as I have connected to it.  Now, I
want to be able to run the VNC Server on port 21, so that I can access it
from work - thinking it will bypass the firewall's protection of
non-standard ports.

The VNC FAQ says you CAN do this - but doesn't explain HOW to do this.  I
know you can run VNC Server on anything 5900+ by changing the display number
from 0-99.  Anything above 99 will change the VNC server to run on the
actual port.  Now to run the server on ports BELOW 99 is what I want to do.
VNC FAQ explains how to CONNECT to these servers, but not how to set the
server up like that.  I put 21 in the Display Number and the server runs on
port 5921.  I cannot put a negative number in the box (won't let me) like
the FAQ suggests you do with the viewer to connect.

So... what are the suggestions for getting around my firewall?  Will using
ports 21, 23, 80 work?  How do I set VNC SERVER to run on these ports?  I
dont want to have to use Remote Admin or PC Anywhere :/

Thanks!



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