3Com 3CRWE554G72T - OfficeConnect Wireless 11g Cable/DSL Router User Manual page 85

1 Select Firewall from the main menu, then select the SPI tab to display the
SPI screen (Figure 64
Figure 64 SPI Screen - upper section
Figure 65 SPI Screen - lower section
Intrusion Detection Feature
The Intrusion Detection feature limits access for incoming traffic at the
WAN ports.
2 Check the Enable SPI and Anti-DoS firewall protection check box to
enable SPI. When this feature is enabled, all incoming packets will be
blocked except for those types that you allow in the Stateful Packet
Inspection section.
and Figure 65):
Firewall 85