The question is closed. How to solve the problem with the crash of the .Net program?

Question

Computer networks

Good day.
The essence of the problem:
There is a terminal server (Windows Server 2008 R2) with a certain number of users. A program is installed on it that is necessary for working remotely (the program is installed on the server, as it uses internal resources and cannot be installed, for example, on a laptop). Single user operation requires a dedicated IP address, so the server is configured with IP virtualization.
For a while, the program worked fine - each user logged into the remote desktop, got their virtual IP and worked. But at one point, the program began to crash with the following error:
System.Net.Sockets.SocketException An attempt was made to access a socket by a method forbidden by access rights
Searches on the Internet did not lead to anything significant. I changed the maximum number of available ports in the registry - it did not help. Disabling the firewall did not solve the problem either.
The program, when starting each of its instances, uses the same port (sometimes it sometimes takes a while and others).

Answer 1

Use Remote Debug Tools to find out exactly where this error is crashing.