Airlink101 AR695W manual Discard Ping from WAN side, SPI Mode, DoS Attack Detection

	period of time. You may set the time-out period to zero to disable
	this feature.
Discard PING from WAN side	Check this box to enable Discard PING from WAN side. When
	you enable this feature, your router will not respond to a “ping”
	request from any host on the WAN side.
SPI Mode	Stateful Packet Inspection mode is a firewall that keeps track of
	the state of network connections (such as TCP, UDP
	communication) travelling across it. The firewall is programmed
	to distinguish legitimate packets for different types of connections.
	Only packets matching a known connection state will be allowed
	by the firewall; others will be rejected.
DoS Attack Detection	Check this box to enable the DoS Attack Detection. Router will
	block the DoS once it is detected. 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 traffic.
VPN PPTP Pass-Through	Check this box and the router will enable PPTP packets pass
	through the router for VPN connection
VPN IPSec Pass-Through	Check this box and the router will enable IPsec packets pass
	through the router for VPN connection.

Click on Save after you finished all settings.

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