If you are using one of these AirStation routers, please make sure you are at the latest firmware to correct a vulnerability that can be used to launch a DDS attack.
http://cyberwarzone.com/dns-attack-causes-internet-failures-4-8-million-japanese-households/The affected routers and recommended firmware versions are as follows:
WMR-300 AirStation N300 Wireless Travel Router - version 1.30 recommended
WHR-300HP2 AirStation HighPower N300 Wireless Router - version 1.50 recommended
WHR-600D AirStation N600 Dual Band Wireless Router - version 1.50 recommended
