User's Manual

Advanced Setup

• SPI and Anti-DoS firewall protection (Default: Enabled) –

When the SPI (Stateful Packet Inspection) feature is turned

on, all incoming packets will be blocked except for those types

marked with a check in the Stateful Packet Inspection section.

• RIP Defect (Default: Enabled) – If an RIP request packet is

not acknowledged to by the Router, it will stay in the input

queue and not be released. Accumulated packets could

cause the input queue to fill, causing severe problems for all

protocols. Enabling this feature prevents the packets

accumulating.

• Discard Ping from WAN (Default: Disabled) – Prevents the

router from responding to any PING request on the WAN port.

• Stateful Packet Inspection – This is called a “stateful” packet

inspection because it examines the contents of the packet to

determine the state of the communications; i.e., it ensures that

the stated destination computer has previously requested the

current communication. This is a way of ensuring that all