Billion Electric Company 7300M User Manual

Your router includes a full SPI (Stateful Packet Inspection) firewall for controlling Internet 

access from your LAN, as well as helping to prevent attacks from hackers. In addition to this, 

when using NAT (Network Address Translation) the router acts as a “natural” Internet  

firewall, since all PCs on your LAN use private IP addresses that cannot be directly 

accessed from the Internet. See the WAN configuration section for more details on NAT.  

 

 

Firewall: Prevents access from outside your network. The router provides three levels of 

security support: 

NAT natural firewall: This masks LAN users’ IP addresses, which are invisible to outside 

users on the Internet, making it much more difficult for a hacker to target a machine on your 

network. This natural firewall is on when the NAT function is enabled. 

 

When using Virtual Servers (port forwarding) your PCs are exposed to the

degree specified in your Virtual Server settings provided the ports specified

are opened in your firewall packet filter settings. 

Firewall Security and Policy (General Settings): Inbound direction of Packet Filter rules