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

Server Closed connection Manual closed Network disconn

Post Reply
epllana
Posts: 1
Joined: 2019-05-21 17:34

Server Closed connection Manual closed Network disconn

Post by epllana »

Hello UltraVNC team,

Recently I installed latest version of UltraVNC 1.2.2.4 it worked fine on both of my workstations at home. I was able to access them from anywhere using DDNS. As of yesterday I am able to access only one workstation but no the other, even when I am at home using IP address at my home LAN. Nothing has changed this happened all of the sudden.

I am using UltraVNC 1.2.2.4 server as Service
I am using UltraVNC 1.2.2.4 viewer
I am using SecureVNCPlugin64.dsm

I am getting this message

Server Closed connection
- Manual closed
- Network disconn

I tried uninstalling UltraVNC 1.2.2.4 and re-installing it didn't help. Amazing thing is that it works fine on my other workstation that is on the same network with same configuration settings, only Port is different.

Can you please help. Thank you very much.
User avatar
Rudi De Vos
Admin & Developer
Admin & Developer
Posts: 6978
Joined: 2004-04-23 10:21
Contact:

Re: Server Closed connection Manual closed Network disconn

Post by Rudi De Vos »

A)
Usual this is caused by some other software that block the vnc port
1) temp disable some security software to determ the cause
2) possible you need to add the exe or port to the firewall software.

B)
Try running it as application and connect.
It could by that vnc popup some message. Running as service this could be hidden as the services doesn't have a desktop.
UltraVNC links (join us on social networks):
- Website: https://uvnc.com/
- Forum: https://forum.uvnc.com/
- GitHub sourcecode: https://github.com/ultravnc/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
- uvnc2me: https://uvnc2me.com/
Post Reply