websocket. Unity client hangs while connecting to the server. Why?

Question

C++ / C#

Recently started working with Websocket-Sharp, I created client and server applications for testing on the same machine. Everything works fine using localhost as the local address. Then I tried to start the server and the client from different machines. The server itself works correctly: all the pages are in place, as well as their functionality. But as soon as I try to launch the game from Unity, it freezes - it can't connect. Any ideas?

Answer 1

Is the problem that it cannot connect or that the unit hangs?
In order not to freeze, everything connected with the network must be done in a separate thread.
And why is not connected - see the log, so I can not say anything.