vnc tunneling over ssh

From: Wolfgang Ebersbach (wolfgang.ebersbach_at_micronas.com)
Date: 01/07/04 

Date: Wed, 07 Jan 2004 14:43:37 +0100

Hi together,
I try to tunnel a vnc connection over ssh in order to get trough a firewall:

vnc_host-->firewall-->vnc_client.

What I do ist:

vnc_client# ssh -L 5901:localhost:5901 vnc_host
 After login to vnc_host :
vnc_host# vncserver
 Which starts the vnc server on port 5901 on vnc_server, as expected.
 Then :
vnc_client# vncviewer localhost:5901
 or
vnc_client# vncviewer localhost:1
 which both leads to this result:
 At vnc_client:
vncviewer: VNC server closed connection
 and at vnc_server:
4409: channel 3: open failed: connect failed: Connection refused

 The problem can not be in SSH, because if I do X11 forwarding via SSH
 ( ssh -X vnc_server ) it works.
 If I try to forward the TCP port instead :
vnc_client# ssh -L 5801:vnc_client:5801 vnc_server
 ,I get the same problem as with port 5901. In fact, I can use any ports
 I want, vnc forwarding never works.
 There are no entries in the logfiles whatsoever. Several queries to google
 groups lead no useful results.

Any help would be greatly appreciated.

Regards,
   Wolfgang

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