Sometimes it is difficult to check if the required ports are open to the license server from the client computer and you are not sure if the licensing service has started on the server. You can do this quick test using the Microsoft Internet Explorer. Type the following into the browser:
NOTE: Replace your-server-name with your actual server name.
The default port values are below:
2080 -> adskflex port
27000 -> lmgrd port
Result in the URL should be should be similar to the following:
If you get no response or unable to connect message, it means the license service is either not running or there is a firewall blocking the communication to the port.
NOTE: This will not work in Chrome or Safari.