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
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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
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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

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L2TP VPN

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5phantom5
Posts: 1
Joined: 2013-01-02 14:28

L2TP VPN

Post by 5phantom5 »

I have recently installed a firewall and therefore changed the VPN connectivity for my network from Cisco Client to L2TP. After doing so, all computers using VNC 1.1.8.0 immediately, present the viewer screen for a split second then close, after entering the password. Older versions still work fine, using SSL VPN instead also works as well, but I would like to stay on the preferred method of using L2TP since it requires no client. There is no firewall blocking the traffic, all other protocols work, ping/icmp works with name or direct ip. Adjusting MTU does not help. It's just L2TP on the new version of Ultravnc. Any ideas?!
mace2442
8
8
Posts: 8
Joined: 2013-03-02 10:51

Re: L2TP VPN

Post by mace2442 »

are you using the SecureVNC-plugin by any chance?

I guess that something is adjusting the package sizes along the way and that causes a tamper-reaction
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Rudi De Vos
Admin & Developer
Admin & Developer
Posts: 6978
Joined: 2004-04-23 10:21
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Re: L2TP VPN

Post by Rudi De Vos »

Server has been updated to 1182.
Possible this issue is also solved.

see
https://forum.ultravnc.net/viewtopic.php?f=67&t=30109
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