User's Manual

Chapter 4 Advance Settings Page 43
Firewall
The firewall is a system or group of systems that enforce an access control policy between two
networks. It may also be defined as a mechanism used to protect a trusted network from an
un-trusted network. The wireless router has capabilities of Port Filtering, IP Filtering, MAC
Filtering, Port Forwarding, URL filtering, and DMZ.
Port Filtering
The Port Filtering gives you the ability to block access only the port that you specify.
Figure 36 Port Filter Settings
Select Enable Port Filtering to activate this setting. Clear this check box to disable it.
Enter the Port Range that you want to filter and select Protocol from the drop-down list box. You
can assign the filter protocol to TCP, UDP or both. After fill in the settings, click Apply Changes to
save the settings. Click Reset to start configuring this part of the screen again.