Atlantis Land 3G 244WN User Manual

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7.4 Firewall and Access Control 
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. 
Besides, when using NAT, the router acts as a “natural” Internet firewall, as all PCs on 
your LAN will use private IP addresses that cannot be directly accessed from the 
Internet. 
 
 
1. 
Firewall: Prevents access from outside your network. The router provides 
three levels of security support: 
o
 
NAT natural firewall: This masks LAN users’ IP addresses 
which is 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 NAT function is 
enabled. 
o
 
Firewall Security and Policy (General Settings): Inbound 
direction of Packet Filter rules to prevent unauthorized