The Linksys WAG200G ADSL modem/router has been found to return sensitive information to anyone sending it a packet to its UDP port 916, this information includes the PPPoA username and password.
By sending a packet to UDP port 916, the Linksys answers with the following information:
* Product model
* Password webinterface
* Username PPPoA
* Password PPPoA
* SSID
* WPA Passphrase
This can be done on both the LAN interface as well as the Wireless interface.