Solved

VNC Authentication failure

Posted on 2006-11-28
8
9,158 Views
Last Modified: 2008-01-09
I have problems accessing any of PC over RealVNC viewer 4. I’ve tried to connect to any of PC from different PC locations (It is still same internal network) and I have been receiving the same message: Authentication failure and tab for username is gray out so i coldn't sign in any username. When I’ve have tried to telnet with 5900 port I’ve received this message RFB 003.003, which implies that nothing wrong  with VNC server (I’ve changed almost everything on VNC server, It'sbeen reconfigured million times).It might have been related to our network but I don’t what is it?  
0
Comment
Question by:lontours
8 Comments
 
LVL 15

Accepted Solution

by:
f-king earned 100 total points
ID: 18029671
0
 
LVL 18

Assisted Solution

by:Frankco
Frankco earned 100 total points
ID: 18030822
Hi lontours,

Can you add VNC to the exceptions in your Windows firewall?

Go to the control panel and click the Security Center ~ Windows Firewall ~ Exceptions
Click Add and browse to the C:\Program Files\RealVNC\VNC4\winvnc4.exe file.

Give it a try and let us know.
cheers,
frankco
0
 
LVL 3

Assisted Solution

by:redlighttraitor
redlighttraitor earned 100 total points
ID: 18030988
Ok, it's 2 things.

Either your firewalls are blocking or you're not forwarding ports.

OR

You're not configuring the right VNC server. Remember that there are two. VNC Server (User-Mode) and VNC Server (Service-Mode). Make sure you configure the one that you use or hell,just configure both of them.

You should also try pinging the host computer from the command prompt to see if that computer is even on the same network. It sounds stupid but might give you some ideas.
0
 
LVL 9

Assisted Solution

by:cdesigner
cdesigner earned 100 total points
ID: 18044936
Maybe problem in VNC, try another - TightVNC v1.3.6

with mirror driver for exapmple ( fastest available solution )
http://www.demoforge.com/dfmirage.htm
0
 
LVL 13

Assisted Solution

by:mrroonie
mrroonie earned 100 total points
ID: 18046082
i use the free RealVNC all the time at work - the free version doesn't require a user name. the easiest way to allow it through the firewall is to close the server and re-open it, this will bring up the windows firewall 'do you want to unblock this app' screen. choose 'unblock' obviously. For some reason every time you close and re-open the RealVNC server it wipes the password so you will have to re-enter it. It sounds like you need to re-enter the password for it
0

Featured Post

Networking for the Cloud Era

Join Microsoft and Riverbed for a discussion and demonstration of enhancements to SteelConnect:
-One-click orchestration and cloud connectivity in Azure environments
-Tight integration of SD-WAN and WAN optimization capabilities
-Scalability and resiliency equal to a data center

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I annotated my article on ransomware somewhat extensively, but I keep adding new references and wanted to put a link to the reference library.  Despite all the reference tools I have on hand, it was not easy to find a way to do this easily. I finall…
Workplace bullying has increased with the use of email and social media. Retain evidence of this with email archiving to protect your employees.
This video shows how use content aware, what it’s used for, and when to use it over other tools.
The viewer will learn how to successfully download and install the SARDU utility on Windows 8, without downloading adware.

792 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question