Make sure your personal firewall is not blocking filetopia or the configured server port.

In most cases Filetopia will be able to open the port for you in your router automatically.


In some cases, specially in company settings or in special setups, some action might be needed on your side to configure the router to map the port to your computer.


In other cases, like hotel connections or public wifis, there is no way to have a port open in your computer.  Even in those cases, the program will be able to function well, with a few limitations, as long as most of the users you want to share with have their ports open.