3Com 3CRWE554G72T User Guide - Page 84

SPI, To activate Content Filtering - udp

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84 CHAPTER 5: ROUTER CONFIGURATION To activate Content Filtering: 1 Select Firewall from the main menu, then select the Content Filter tab. The Content Filter screen displays (Figure 63). Figure 63 Content Filter Screen 2 Make sure the Enable Content Filter check box is checked. 3 Select the Content Filter Server that you require from the drop-down list. If you select custom entry, enter the server IP address in the text box. 4 Select the Server Timeout value in milliseconds. The default is 3000 milliseconds (3 seconds). 5 Select Allow or Deny for each displayed category, as required. Click Apply to save the settings. SPI Stateful Packet Inspection (SPI) inspects, and if required blocks packets at the application layer. SPI also maintains TCP and UDP session information, including timeouts and the number of active sessions, and provides the ability to detect and prevent certain types of network attacks such as DoS attacks. Denial of Service (DoS) attacks are aimed at devices and networks with a connection to the Internet. The goal is not to steal information, but to disable a device or network so users no longer have access to network resources. To configure SPI information on your Router:

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84
C
HAPTER
5: R
OUTER
C
ONFIGURATION
To activate Content Filtering:
1
Select
Firewall
from the main menu, then select the
Content Filter
tab.
The Content Filter screen displays (
Figure 63
).
Figure 63
Content Filter Screen
2
Make sure the
Enable Content Filter
check box is checked.
3
Select the
Content Filter Server
that you require from the drop-down list.
If you select
custom entry
, enter the server IP address in the text box.
4
Select the
Server Timeout
value in milliseconds. The default is 3000
milliseconds (3 seconds).
5
Select
Allow
or
Deny
for each displayed category, as required.
Click
Apply
to save the settings.
SPI
Stateful Packet Inspection (SPI) inspects, and if required blocks packets at
the application layer. SPI also maintains TCP and UDP session
information, including timeouts and the number of active sessions, and
provides the ability to detect and prevent certain types of network attacks
such as DoS attacks.
Denial of Service (DoS) attacks are aimed at devices and networks with a
connection to the Internet. The goal is not to steal information, but to
disable a device or network so users no longer have access to network
resources.
To configure SPI information on your Router: