Allied Telesis AT-WA1004G manual Client contacts the Server with a connection

Advanced Administration

Threshold	This setting affects the number of “half-open”
	connections allowed.
	❏ A “half-open” connection arises when a remote
	client contacts the Server with a connection
	request, but then does not reply to the Server's
	response.
	❏ While the optimum number of “half-open”
	connections allowed (the “Threshold”)
	depends on many factors, the most important
	factor is the available bandwidth of your
	Internet connection.
	❏ Select the setting to match the bandwidth of
	your Internet connection.
Options
Respond to ICMP	The ICMP protocol is used by the “ping” and
	“traceroute” programs, and by network
	monitoring and diagnostic programs.
	❏ If checked, the Wireless Router will respond to
	ICMP packets received from the Internet.
	❏ If not checked, ICMP packets from the Internet
	will be ignored. Disabling this option provides
	a slight increase in security.
Allow IPsec	The IPSec protocol is used to establish a secure
	connection, and is widely used by VPN (Virtual
	Private Networking) programs.
	❏ If checked, IPSec connections are allowed.
	❏ If not checked, IPSec connections are blocked.
Allow PPTP	PPTP (Point to Point Tunneling Protocol) is widely
	used by VPN (Virtual Private Networking)
	programs.
	❏ If checked, PPTP connections are allowed
	❏ If not checked, PPTP connections are blocked.
Allow L2TP	L2TP is a protocol developed by Cisco for VPNs
	(Virtual Private Networks).
	❏ If checked, L2TP connections are allowed.
	❏ If not checked, L2TP connections are blocked.

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