Billion Electric Company 7402NX 사용자 설명서

Billion BiPAC 7402NX(L) 802.11n 3G/ADSL2+ (VPN) Firewall Router

Chapter 4: Configuration

When using Virtual Servers your PCs will be exposed to the degree
specified in your Virtual Server settings provided the ports specified are
opened in your firewall packet filter settings.

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 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.

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.

URL Filter: To block PCs on your local network from unwanted websites.

Here are the items within the Firewall section:

General Settings, Packet Filter, Intrusion Detection,

URL Filter, IM/P2P Blocking

and

Firewall Log.

General Settings

You can choose not to enable Firewall and still able to access to URL Filter and IM/P2P Blocking or
enable the Firewall using preset filter rules and modify the port filter rules as required. The Packet Filter is
used to filter packets based-on Applications (Port) or IP addresses.

There are four options when you enable the Firewall, they are:

All blocked/User-defined: no pre-defined port or address filter rules by default, meaning that
all inbound (Internet to LAN) and outbound (LAN to Internet) packets will be blocked. Users have to