If you can connect on the server itself without any issues, but connections from other computers fail, the cause is usually a Java update.
After an update, the path to the Java application changes, and the original firewall rule becomes invalid. As a result, the firewall blocks the new version of Java.
🔹 How to identify the problem
the connection works directly on the server
connections from other computers fail
the following errors appear:
"could not connect to the server"
"timeout"
🔹 Solution
Open the firewall settings on the server
Locate the rule for Java
Add a new rule for the current version of Java (new path to
java.exe)
Save the changes and try connecting again