The hosts and Relay server are all located internally.
It looks like your Hosts cannot connect to your server. In order to verify that, you can check the Host logs located in C:\Program Files\Remote Utilities - Host\Logs\.
I assume that the reason why your Hosts cannot connect is perhaps that you use the external IP address of your server in the Host's Internet-ID connection settings. Try using the internal/local server address so long as the server is accessible to your Hosts via LAN.
Is there a way to assign a static local port for a connection?
No, you cannot specify a static port, it should be dynamically assigned.
My hope was to be able to save a Windows RDC session with saved settings and launch it from an RDC shortcut on the desktop after Viewer is launched.
Create an RU connection, right click on it and select Properties. Navigate to the RDP section.
Click Configure, set your options and click Save. Close the properties window. Now you can right click on the connection and select Create shortcut on the desktop. You will be able to create a shortcut for a specific connection and specific connection mode (in this case RDP).
First I thought it was a connection problem or some program freeze... And therefor I was restarting my client all the time.
The session should unpause when you bring forward the Full Control window? Does it stay paused in your case?
Can you make this feature optional?
That might be possible, but provided that it should pause/unpause automatically, it doesn't make much sense. By the way, the reason behind pausing a session when its window is minimized is to save traffic/bandwidth, which for some users may be an important factor.
Currently, yes, it is possible, although it cannot lead to any breach of the server or other harm. Besides, the probability that someone knows exactly at which IP address (or DNS name) and port your server service is running is very low.
However, in the near future we will implement features that will prevent such unauthorized use of the relay function. As for the nearest server update, we will add the ability to specify different communication ports for Viewers and Hosts that they use to talk to the server.
Don't hesitate to ask me if you have other questions.