TightVNC's interaction with network communication

[Brian D. <bri...@ne...>]

I am trying to better understand the Technical details of how TightVNC viewer creates and maintains a connection to the TightVNC Server.
Specifically, are there any firewall or network configuration changes made by the software to function?

I have a new windows workstation that is domain joined on the primary network connection.
I am using an OPC Server to communicate to a PLC through a second dedicated ethernet card.

When I connect TightVNC through the primary network to the workstation, the OPC Server write speeds increase 10x.
Yes, for some reason the write performance improves when I maintain a TightVNC connection to the primary network card.  Which is not the one being used by our OPCServer/PLC.

As soon as the TightVNC Session is closed, my write performance drops off immediately.

I am using TightVNC Viewer version 2.8.59

Thank you