I'm running UltraVNC Server on a PC with 2 Ethernet ports.
These ports are combined with a virtual bridge from Microsoft in Windows 11.
One of the port is connected to a laptop with 1 Gbit/s link to a laptop. The other port is not connected.
On the laptop there is a UltraVNC Viewer running.
The connection is established very quick but the response after connection when moving windows is very slow.
It takes up to 30 s to refresh.
If i disable the virtual bridge everything works fast.
Both PC and Laptop have Windows 11 with UltraVNC 1.4.3.6 with SecurePlugin enabled.
Any ideas why this happens?
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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
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Very slow UltraVNC when network adapters are combined with a virtual bridge
-
Rudi De Vos
- Admin & Developer
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Re: Very slow UltraVNC when network adapters are combined with a virtual bridge
There are many posts on the net that sometimes virtual bridges are slow for tcp .
I'm not a bridge specialist but it seems to happen when there are routing issue's.
Google "virtual bridge microsoft slow"
Perhaps you understand the answers better
I'm not a bridge specialist but it seems to happen when there are routing issue's.
Google "virtual bridge microsoft slow"
Perhaps you understand the answers better
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