[Decibel]

Universal Plug and Play (UPnP)

Benefit
UPnP can solve NAT (Network Address Translation) connection problems with active (PORT) mode.

Typical Scenario
The client is behind a NAT and wants to connect to an FTP server supporting PORT mode only (because the server is behind a NAT as well or due to security / firewall policies). In this case without UPnP the ports have to be manually enabled and forwarded in the NAT router and a port range has to be defined in the FTP client configuration. With the new (UPnP) feature everything is automatically handled for the user.