Update: UltraVNC 1.4.3.6 and UltraVNC SC 1.4.3.6: viewtopic.php?t=37885
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authentification rejected

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StefanHo
Posts: 1
Joined: 2020-09-14 08:25

authentification rejected

Post by StefanHo »

Hello,
I want to use UltraVNC between 2 Windows 10 Pro PCs. At PC1 (Server) I have started UltraVNC Server and set a passwort at admin properties.
At PC 2 (Client) I start UltraVNC Viewer. Port 5900 at the server is open (tested with telnet).
When I try to establish a VNC connection I get only a authentification rejected. In the log file (mslogon.log) at the server I see:
11/9/2020 0:18 Connection received from 192.168.1.xx
11/9/2020 0:19 Invalid attempt from client 192.168.1.xx

What is wrong in my setting? I have tried it also with easy passwords like 12345
What do I have to change in the setting/configuraton?

Thanks!
nathenxbrewer
Posts: 1
Joined: 2020-09-21 19:37

Re: authentification rejected

Post by nathenxbrewer »

I have seen this issue as well. My team of 10 people service thousands of devices all running the same version of UltraVNC server, and using the same password. We started to see this issue towards the beginning of September. If we attempt to connect, and then retry in 3-5 mins, it will eventually connect. We have tried to use other VNC Viewers such as TightVNC and RealVNC viewer, to no avail, same error message. I would love to find an answer as to why this is happening.

*Note, my .log files look the same, no obvious reasons this isn't working.
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