American Power Conversion 3-in-1 Wireless Mobile Router Manuale Utente

The Security Screen

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Use this screen to set firewall and other security-related options.

The following table describes the fields on the Security Screen. 

 

If enabled, DoS (Denial of Service) attacks will be detected and 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 devices, but overloads the Internet 

This device uses “Stateful Inspection” technology. This system can detect situations where individual 

TCP/IP packets are valid, but collectively they become a DoS attack.

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 the Internet connection.
Select the setting that matches the bandwidth of the Internet connection. 

The ICMP protocol is used by the ping and traceroute programs, and by network monitoring and 

diagnostic programs.
If checked, the APC 3-in-1 Wireless Mobile Router will respond to ICMP packets received via the 

WAN port.
If not checked, ICMP packets from the WAN port will be ignored. Disabling this option provides a 

slight increase in security.

The IPSec protocol is used to establish a secure connection, and is widely used by VPN (Virtual Private 

Networking) programs.
If checked, IPSec connections from the Wireless LAN are allowed.
If not checked, IPSec connections are blocked.