Can't connect to vncserver running on Ubuntu Linux box

[B. Scott Smith]

Actually, it sounds more like you have a firewall (iptables) running on 
the Linux box preventing the connection.
I assume telnet <server> 5900 also fails when NOT attempted from the 
local box.


Kort, Eric wrote:

>Hi. Thanks for your ideas.
>
>XP Firewall is permanently disabled by IT command, so I can not turn it
>on.  Turning off what virus protection I can turn off did not help.
>However, I am able to connect to many other VNC servers on our network
>(some of which I have set up myself).
>
>-Eric
>
>-----Original Message-----
>From: vnc-list-admin "at" realvnc.com [mailto:vnc-list-admin "at" realvnc.com] On
>Behalf Of John Aldrich
>Sent: Monday, December 05, 2005 2:27 PM
>To: Kort, Eric; vnc-list "at" realvnc.com
>Subject: RE: Can't connect to vncserver running on Ubuntu Linux box
>
>Do you have the XP firewall running? If so, try putting in an exception
>for
>the VNC Executable... even if it's not running, enable it, put in the
>exception and disable it. There is anecdotal evidence that the XP
>firewall
>can block things, even if it's not "enabled."
>
>Also, any other firewall/antivirus/security software on the XP box?
>
>-----Original Message-----
>From: vnc-list-admin "at" realvnc.com [mailto:vnc-list-admin "at" realvnc.com]On
>Behalf Of Kort, Eric
>Sent: Monday, December 05, 2005 1:16 PM
>To: vnc-list "at" realvnc.com
>Subject: Can't connect to vncserver running on Ubuntu Linux box
>
>
>I am running vncserver on my Ubuntu Linux box (fresh install, Breezy
>Badger), and trying to connect to it from my windows XP box, but have
>not been able to (I can connect to other linux and windows-based VNC
>servers from this box on my network).  
>
>I CAN connect to this server from the localhost.  From my windows box,
>however, I do not even get a log-in prompt.  Vncviewer 3.x states
>"Failed to connect to server" and vncviewer 4 (set to use only 3.3
>protocol) states "unable to connect to host: Connection refused
>(10061)".  I can find no trace of VNC errors in the system log.
>
>Here are the responses to the troubleshooting steps:
>
>  
>
>>Can you "ping" the VNC Server from the Viewer machine?
>>    
>>
>YES, and vice-versa
>
>  
>
>>Are the Viewer and Server on the same LAN?
>>    
>>
>YES
>
>  
>
>>Are you sure the VNC Server is running?
>>    
>>
>YES.  telnet-ing my vncserver on port 5900 yields response of RFB
>003.003
>
>  
>
>>Can you get to the VNC password prompt?
>>    
>>
>No.
>
>  
>
>>Is the VNC Server restricting connections?
>>    
>>
>No.
>
>Can someone advise me what to try next?
>
>Thank you,
>-Eric Kort
>
>This email message, including any attachments, is for the sole use of
>the
>intended recipient(s) and may contain confidential information.  Any
>unauthorized review, use, disclosure or distribution is prohibited.  If
>you
>are not the intended recipient(s) please contact the sender by reply
>email
>and destroy all copies of the original message.  Thank you.
>_______________________________________________
>VNC-List mailing list
>VNC-List "at" realvnc.com
>To remove yourself from the list visit:
>http://www.realvnc.com/mailman/listinfo/vnc-list
>_______________________________________________
>VNC-List mailing list
>VNC-List "at" realvnc.com
>To remove yourself from the list visit:
>http://www.realvnc.com/mailman/listinfo/vnc-list
>This email message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential information.  Any unauthorized review, use, disclosure or distribution is prohibited.  If you are not the intended recipient(s) please contact the sender by reply email and destroy all copies of the original message.  Thank you.
>_______________________________________________
>VNC-List mailing list
>VNC-List "at" realvnc.com
>To remove yourself from the list visit:
>http://www.realvnc.com/mailman/listinfo/vnc-list