Successfully performed a remote install using FastPush but when I attempt to connect to my test machine, I'm getting the error: "This server does not have a valid password enabled. Until a password is set, Incoming connections cannot be accepted."
I am using UltraVNC v1.0.5.6. I have followed the FastPush instructions to the letter but I cannot get around this error. Ive noticed others having the same problem, but no one seems to have a solution.
I have to install VNC on 100 new workstations....please help.
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:
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- OpenHub: https://openhub.net/p/ultravnc
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
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- Reddit community: https://www.reddit.com/r/ultravnc
- OpenHub: https://openhub.net/p/ultravnc
This server does not have a valid password enabled.
- Rudi De Vos
- Admin & Developer

- Posts: 6978
- Joined: 2004-04-23 10:21
- Contact:
Re: This server does not have a valid password enabled.
the ultravnc.ini need to have password.
Make sure you create local a passwd in this file before pushing it.
Verify with fastpush if it also push this file
Make sure you create local a passwd in this file before pushing it.
Verify with fastpush if it also push this file
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/
- 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/
Re: This server does not have a valid password enabled.
Ultravnc.ini is now included in fastpush. Now when I run fastpush, it installs UltraVNC onto the remote machine, but the remote machine shows the "Server Properties" page. If I click OK, it brings up a windows credentials box which asks for a user account to run UltraVNC. If I click cancel, I get an error that reads "Running WinVNC without a password is a dangerous security risk...." I have exported the password from the registry and included it in the fastpush files, so I'm a little confused as to why this is happening.
- Rudi De Vos
- Admin & Developer

- Posts: 6978
- Joined: 2004-04-23 10:21
- Contact:
Re: This server does not have a valid password enabled.
"server properties popup first run, when no password is set"
1) is ultravnc.ini on the remote machine in the same folder as winvnc.exe
2) does this file contain a password
registry ? ultravnc from 104 doesn't use registry, all is saved in a file, including password
1) is ultravnc.ini on the remote machine in the same folder as winvnc.exe
2) does this file contain a password
registry ? ultravnc from 104 doesn't use registry, all is saved in a file, including password
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/
- 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/
Re: This server does not have a valid password enabled.
Ultravnc.ini is in the same folder as winvnc.exe on the remote machine and ultravnc.ini does have a password set. Unfortunately, ultravnc still prompts for a password.
Re: This server does not have a valid password enabled.
I removed ultravnc on the remote machine and started from scratch. Ultravnc.ini is not copied over by fastpush and fastpush uses the machine.ini file found in the "common" folder to make changes to the registry.
Since I am using the latest version of UltraVNC, these registry changes made by the machine.ini file are not needed, is that correct?
This is what fastpush copied to the remote pc:
authadmin.dll
authSSP.dll
vnchooks.dll
vncviewer.exe
vncviewer_tab.exe
Whatsnew.txt
winvnc.exe
workgrpdomnt4.dll
zip32.dll
I then manually copied over ultravnc.ini and restarted the winvnc service, and I was able to connect. Now I need to figure out how to add ultravnc.ini to the files that fastpush copies to the remote pc as well as what I should do about the machine.ini file.
Since I am using the latest version of UltraVNC, these registry changes made by the machine.ini file are not needed, is that correct?
This is what fastpush copied to the remote pc:
authadmin.dll
authSSP.dll
vnchooks.dll
vncviewer.exe
vncviewer_tab.exe
Whatsnew.txt
winvnc.exe
workgrpdomnt4.dll
zip32.dll
I then manually copied over ultravnc.ini and restarted the winvnc service, and I was able to connect. Now I need to figure out how to add ultravnc.ini to the files that fastpush copies to the remote pc as well as what I should do about the machine.ini file.
- Rudi De Vos
- Admin & Developer

- Posts: 6978
- Joined: 2004-04-23 10:21
- Contact:
Re: This server does not have a valid password enabled.
registry is not used, machine.ini should have no effect on the usage
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/
- 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/
Re: This server does not have a valid password enabled.
Thanks for the info. Everything seems to be working the way it should.
