Planet Technology VRT-401 Data Security Options Screen, SPI Firewall Enable DoS, Threshold

Security Configuration

Security Options

This screen allows you to set Firewall and other security-related options.

Figure 40: Security Options Screen

Data - Security Options Screen

SPI Firewall

Enable DoS	If enabled, DoS (Denial of Service) attacks will be detected and
Firewall	blocked. The default is enabled. It is strongly recommended that
	this setting be left enabled.
	Note:
	∙ A DoS attack does not attempt to steal data or damage your
	PCs, but overloads your Internet connection so you can not
	use it - the service is unavailable.
	∙ This device uses "Stateful Inspection" technology. This
	system can detect situations where individual TCP/IP pack-
	ets are valid, but collectively they become a DoS attack.
Threshold	This setting affects the number of "half-open" connections al-
	lowed.
	∙ A "half-open" connection arises when a remote client con-
	tacts 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.

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