AT-AR220E Broadband Router Installation Guide
51
Packet Filtering
Packet filtering allows you to block users from accessing specific services
(or applications) on the Internet. For example, the administrator can
deny the users access to SMTP/POP3 email services on the Internet,
while allowing them access to the Web/HTTP services. By default, packet
filtering is disabled.
Clicking the Packet Filtering item in the left-side window displays the
Packet Filtering page, shown in Figure 21.
Figure 21 Packet Filtering
To enable or disable the Packet Filtering feature:
1.
Change the Packet Filtering field as desired.
2.
Click the Apply button.
If you enable packet filtering, you can specify the filtering rules by
either IP address or port number. Both methods are described in the
following sections.
IP Rule
To filter packets by IP address:
1.
Click the IP Rule selection to display the window in Figure 22.
Figure 22 IP Rule
