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conneting to VNC from behind proxy

Posted on 2004-03-22
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Last Modified: 2011-09-20
I installed ultravnc at home, and it's been working fine everywhere except for where I am now.  This puzzled me until I remembered that here we're behind a proxy, so I'm guessing that's preventing me from connecting to my home computer from here.  when I type http://myipaddress:5800, the applet loads, prompts for password, and then displays a "network error: could not connect to server: myipaddress:5900".  I was wondering if there was a way to make this work.  If you can help, thanks, it's greatly appreciated.

Jonathan
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Question by:FredPiano
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Expert Comment

by:PJRivr
ID: 10654593
Possibly is a firewall issue blocking the port.
Found this link:
 http://www.calwell.ca/articles/a0028.php
Details how to change the port configuration so that it can use port 80.  According to UltraVNC site, they referred any configuration changes to the RealVNC site which is the instructions in the URL above.  The registry item may have a different name in conjunction with UltraVNC, but should be found in the same location.
Good luck,
Pj.
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Accepted Solution

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htjiawi earned 105 total points
ID: 10910160
To connect to your VNC from behind a restricted proxy, you need to setup additional layer of tunneling software. As long as you are still allowed to access SSL/https than this can be done. You will need to do the following

ON SERVER:
- install ORENOSP:
  http://hp.vector.co.jp/authors/VA027031/orenosp/index_en.html
- generate certificate using the same software package
- configure sproxy.conf to point to your VNC service
- open port 443 (https)

ON CLIENT
- configure otunnel.conf (found from same website location)
- make sure your otunnel.conf is consistence with sproxy.conf
- run otunnel.exe -c
- run your remote client

with this setting it is even more secure than your previous setting since you are using SSL/https and your privacy is protected as well.

Good Luck
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