DSM Plugin between 32-bit and 64-bit

[uglymr]

Hello all,

I'm new to this forum and hope to get some help here. Thanx in advance
I have one Windows XP 32-bit and one Windows 7 Home 64-bit pc. For security reasons I want to use DSM Plugin to make connection from Windows 7 to Windows XP over the Internet.
Without DSM Plugin, I can connect with no problem. When I want to use DSM Plugin it seems to me that the 32-bit version is not compatible with the 64-bit version, is that right?
Can anyone please give me a hint on how to connect the two mentioned PCs with using DSM Plugin, please?
A second question would be if it is necessary to use DSM Plugin for security reasons if I would use a VPN connection instead?

Thank you very much

[Rudi De Vos]

You need to use the 32-bit plugin with 32-bit UltraVNC and the 64-bit plugin with 64-bit UltraVNC.
You can connect a 32-bit UltraVNC Server with a 64-bit UltraVNC Viewer or a 64-bit UltraVNC Server with a 32-bit UltraVNC Viewer.

It works, just make sure you use the plugin of the same bit as the EXE.

[uglymr]

Thank you very much for your quick answer.

But I don't exactly know what you mean with "just make sure you use the plugin of the same bit as the EXE."
Can you please explain further to an a bit dummy user that I am

Thank you very much

[Rudi De Vos]

There is a 32-bit (SecureVNCPlugin.dsm) plugin and a 64-bit (SecureVNCPlugin64.dsm) plugin.

Using a 32-bit dsmplugin with a 64-bit winvnc.exe/vncviewer.exe -> fail
Using a 64-bit dsmplugin with a 32-bit winvnc.exe/vncviewer.exe -> fail
Using a 32-bit dsmplugin with a 32-bit winvnc.ex/vncviewer.exee -> OK
Using a 64-bit dsmplugin with a 64-bit winvnc.exe/vncviewer.exe -> OK

You can connect from:
winvnc.exe (64-bit) + SecureVNCPlugin64.dsm <-> vncviewer.exe (64-bit) + SecureVNCPlugin64.dsm -> OK
winvnc.exe (32-bit) + SecureVNCPlugin.dsm <-> vncviewer.exe (32-bit) + SecureVNCPlugin.dsm -> OK
winvnc.exe (64-bit) + SecureVNCPlugin64.dsm <-> vncviewer.exe (32-bit) + SecureVNCPlugin.dsm -> OK
winvnc.exe (32-bit) + SecureVNCPlugin.dsm <-> vncviewer.exe (64-bit) + SecureVNCPlugin64.dsm -> OK

[uglymr]

Thank you very much. Now I got it

[fosters]

I can connect to a remote 32-bit test/dev (Windows 2003) Server from 64-bit Thinkpad (Windows 7 KVM) at first using UltraVNC but then the next day cannot connect again. It hangs on Negotiating Protocol Version or get and error about a DSM Plugin missing. The workaround is to use RDC and do a physical reboot of the 32-bit test/dev Server, then I can connect with UltraVNC again from the Thinkpad. So something expires on the 32-bit Server for UltraVNC after about 24 hours. Where do I get the right DSM Plugin for the 32-bit Server?

[Rudi De Vos]

There are no expires in UltraVNC.
You are using the correct plugins, else it would not work at all.
Looks like the Server (running as service) get blocked... possible caused by some port scanners or other software scanning the default VNC ports.

- try to activate the winvnc.log logging, possible there is some clue in the debug
- update the the pre-release 1.2.0.8 possible it's something that's fixed
- using another port then the default one