Tomcat 9 WebSocket. How to connect to the server?

Question

Java

The bottom line:
There are examples of chat and echo.
If you run it on the server, everything is fine, but when you try to connect remotely, it gives a 1006 (101) error.
What could be the problem?
Ordinary servlets work flawlessly.
In the chat example, you can see that it is trying to connect but immediately disconnects.

Answer 1

Most likely, the tomcat sticks out only on localhost. Look in the server.xml
settings of the tomcat and change from 127.0.0.1 to 0.0.0.0 lines with Connector
<Connector address="127.0.0.1" ......