This script is Copyright (C) 2009-2011 Tenable Network Security, Inc.
It was possible to read the external IP addres of the remote router.
According to UPnP data, the remote device is a NAT router that supports
the Internet Gateway Device (IGD) Standardized Device Control Protocol.
Nessus was able to get the external IP address of the device.
See also :
Disable IGD or restrict access to trusted networks.
Risk factor :