PLANET FRT-401 - Manual (Page 45)

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3.4 Firewall
The Fiber Router provides the fully firewall functions, such as IP/Port/MAC Filtering, Port
Forwarding, DMZ, SPI Firewall and Content Filtering. It serves as an Internet firewall to
protect your network from being accessed by outside users.
3.4.1 MAC/IP/Port Filtering
Use the MAC/IP/Port filters to deny / allow particular LAN IP addresses from accessing the
Internet. You can deny / allow specific port numbers or all ports for a specific IP address.
You may set up firewall rules to protect your network from malicious activity on the Internet.
It is also convenient for you to delete these settings.