After more 2 000 000 (two million) views on forum for 1.5.0.x development versions... and 1.6.1.0, 1.6.3.0-dev versions
A new stable version, UltraVNC 1.6.4.0 and UltraVNC SC 1.6.4.0 have been released: https://forum.uvnc.com/viewtopic.php?t=38095
Feedback is always welcome

2025-12-05: Celebrating the 23th anniversary of the UltraVNC (26th anniversary since the laying of the foundation stone): https://forum.uvnc.com/viewtopic.php?t=38130

2025-12-03: Could you please complete our poll/survey? Renaming UltraVNC files and service to be more clear: https://forum.uvnc.com/viewtopic.php?t=38128
There was a problem to vote, it is solved now! Thanks in advance!

2025-12-02: We need help: English Wikipedia UltraVNC page has been requested to deletion: https://forum.uvnc.com/viewtopic.php?t=38127
Any help is welcome to improve the UltraVNC page and/or to comment on the Wikipedia Talk page

2025-05-06: Forum password change request: https://forum.uvnc.com/viewtopic.php?t=38078

2023-09-21: Important: Please update to latest version before to create a reply, a topic or an issue: https://forum.uvnc.com/viewtopic.php?t=37864

Development: UltraVNC development is always here... Any help is welcome
Feedback is welcome

Join us on social networks and share our announcements:
- Website: https://uvnc.com/
- GitHub: https://github.com/ultravnc
- Mastodon: https://mastodon.social/@ultravnc
- Bluesky/AT Protocol: https://bsky.app/profile/ultravnc.bsky.social
- Facebook: https://www.facebook.com/ultravnc1
- X/Twitter: https://x.com/ultravnc1
- Reddit community: https://www.reddit.com/r/ultravnc
- OpenHub: https://openhub.net/p/ultravnc

Invalid protocol

Should you have problems with the DSM plugin? Here is the place to look for help or report issues
Post Reply
batmoble

Invalid protocol

Post by batmoble »

Anyone else get the message "Connection failed - Invalid protocol!..." I followed the very clear instructions on how to install the MSRC4 Plugin with Ultra VNC but cannot use the promised encryption. Have tried serveral different scenarios, including manually copying the key file and also copying it using the file transfer built into Ultra VNC. Server generates no error log.
ShanghaiJo

Same prob

Post by ShanghaiJo »

Hi,

I have exactly the same problem and the computer were the server is located is logged as admin (not the one with the viewer)
lenisham
40
40
Posts: 104
Joined: 2004-06-24 07:00

Re: Invalid protocol

Post by lenisham »

batmoble wrote:Anyone else get the message "Connection failed - Invalid protocol!..." I followed the very clear instructions on how to install the MSRC4 Plugin with Ultra VNC but cannot use the promised encryption. Have tried serveral different scenarios, including manually copying the key file and also copying it using the file transfer built into Ultra VNC. Server generates no error log.
I bet your user and server settings are different.

[topic=58][/topic]
rickytran
Posts: 1
Joined: 2006-03-28 23:51

Post by rickytran »

It would be nice if you guys would share you finding...
bevtech
800
800
Posts: 2168
Joined: 2005-08-03 14:07
Location: Pennsylvania, United States

Post by bevtech »

I would need a lot more information on what version you are using etc before I could offer any assistance.. Post without including Operating System Version of UVNC really do not give us enough information to assist.. More Details are needed...:)
Bevtech

Windows XP Home, Pro SP2, Windows 2003 SBS server SP2 (EN), Windows Media Center Editon 2005, Windows Vista Home Premium, Fedora Core 6, Windows 9X, PcHelpWare 1.0, UltraVNC 1.0.8.2

User not developer ;)
Post Reply