UPnP settings for the FRITZ!Box can be configured on this page.
The Universal Plug & Play (UPnP) service included in your FRITZ!Box provides status information about the FRITZ!Box to all connected computers. Programs with UPnP support on these computers can receive this information and use them to display the status of the FRITZ!Box (e.g., DSL synchronization, connection status, data transmission). UPnP service thus allows you to monitor your FRITZ!Box from a connected computer.
This setting must be enabled if the FRITZ!DSL software is supposed to display status information on your computer.
The Universal Plug & Play (UPnP) service available in your FRITZ!Box makes it possible to control the FRITZ!Box security settings from a connected computer.
A program with UPnP support on a connected computer tells FRITZ!Box which ports are to be enabled for port forwarding in order to allow access from the Internet to services on the computer. When the setting "Allow changes to security settings over UPnP" is activated, the FRITZ!Box automatically enables incoming connections from the Internet to be forwarded to the ports demanded by the application.
A list of the ports open via UPnP is displayed in the "Internet / Permit Access / Port Forwarding" menu.
For security reasons, only enable this option if you really want to allow incoming connections from the Internet.
Click the "Apply" button to implement your changes to the settings.