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Firewall
Firewall and Access Control
Your router includes a full SPI (Stateful Packet Inspection) rewall 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 rewall, since all PCs on
your LAN use private IP addresses that cannot be directly accessed from the Internet. See the WAN
conguration section for more details on NAT.
Firewall: Prevents access from outside your network.
NAT natural rewall: This masks LAN users’ IP addresses, which are invisible to outside users on
the Internet, making it much more difcult for a hacker to target a machine on your network. This
natural rewall is on when the NAT function is enabled.
Firewall Security and Policy (General Settings): Inbound direction of Packet Filter rules prevent
unauthorized computers or applications accessing your local network from the Internet.
Intrusion Detection: Enable Intrusion Detection to detect, prevent, and log malicious attacks.
Access Control: Allow the ltering of unauthorized users from other networks or WAN, unwanted
websites & malicious programs from accessing the local network.
MAC Filter rules: Prevents unauthorized computers accessing the Internet.
URL Filter: Blocks PCs on your local network from unwanted websites.
A detailed explanation of each of the following items appears in the Firewall section below: General
Settings, Packet Filter, Intrusion Detection, URL Filter, IM/P2P Blocking and Firewall Log.
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General
