Airlink AR660W3G User Manual - Page 64

Parameter IPsec pass through PPTP pass through L2TP pass through Description Check this box and the router will enable IPsec packets pass through the router for VPN connection. Check this box and the router will enable PPTP packets pass through the router for VPN connection Check this box and the router will enable L2TP packets pass through the router for VPN connection. 3.5.3 DoS (Denial-of-Service) Denial of Service (DoS) is a common attack measure, by transmitting a great amount of data or request to your Internet IP address and server, the Internet connection will become very slow, and server may stop responding because it is not capable to handle too much traffics. This router has a built-in DoS attack prevention mechanism; when you activate it, the router will stop the DoS attack for you. Parameter Ping of Death Discard Ping From WAN Port Scan Description Set the threshold of when this DoS prevention mechanism will be activated. Please check the box of Ping of Death, and input the frequency of threshold (how many packets per second, minute, or hour), you can also input the "Burst" value, which means when this number of "Ping of Death" packet is received in very short time, this DoS prevention mechanism will be activated. Check the box to discard this ping request to the WAN IP address of the router. Many kind of port scan methods are listed here, please check one or more DoS attack methods you want to prevent. 65