Non-Standard Ports dont work.

When trying to use a Custom Ports in the server-properties file, under the section server-port, the server wont be able to be joined even after succesfull startup. The following Ports have been tried: 25558, 25568, 20120 and Standard (25565)

Expected behaviour:

On all startups with any custom Port should the server be joinable.

 

The attachements will include the list of my enabled ports, the server.properties file and the error message I get while joining the server.