Ovislink OV804WV User Manual page 109

Note: The security is like a firewall.
Choose Security > IP Filtering and the following interface
appears. By default, the firewall is enabled. The firewall is used
to block document transmissions between the Internet and
your PC. It serves as a safety guard and permits only
authorized documents to be sent to the LAN.
Note: If the DSL Router is configured to bridge mode only, IP
filtering is disabled and the IP filtering interface does not
appear.
If the DSL Router does not configure a PVC of bridge mode,
MAC filtering is disabled and the MAC filtering interface does
not appear.
Figure 82 Security application
105