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3.6.3.4 Firewall
Your router includes a full DoS 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. Please see the WAN configuration section for more details on 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.
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 NAT function is enabled.
Firewall Security and Policy (General Settings): Inbound direction of Packet Filter rules to
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: Prevents access from PCs on your local network:
Firewall Security and Policy (General Settings): Outbound direction of Packet Filter rules
to prevent unauthorized computers or applications accessing the Internet.
MAC Filter rules: To prevent unauthorized computers accessing the Internet.
URL Filter: To block PCs on your local network from unwanted websites.
You can find 10 items under the Firewall section: General Settings, Packet Filter, Intrusion
Detection, MAC Address Filter, URL Filter (up to 30 rules) and Firewall Log.
You can choose not to enable Firewall, to add all filter rules by yourself, or enable the
Firewall using preset filter rules and modify the port filter rules as required.
3.6.3.4.1 Packet Filering
User can decide to enable this firewall function including Packet Filter, Block Hacker Attack,
and Block WAN request features for better security control or not. But be noted, it wastes
network processor computation power. The performance will be lower about 10% to 15%.
More firewall features will be added continually, please visit our web site to download latest
firmware.
Packet filtering function enables you to configure your router to check specified
internal/external user (IP address) from Internet access, or you can disable specific service
request (Port number) to /from Internet. This configuration program allows you to set up
different filter rules up to 10 for different users based on their IP addresses or their network
Port number. The relationship among all filters is “or” operation, which means the device
checks these different filter rules one by one, stating from the first rule.
As long as one of the rules is satisfied, the specified action will be taken. remote server using
the port number.