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DSL-G804V Wireless ADSL Router User’s Guide
Firewall
Firewall is used to allow or deny traffic from passing through your local network. If Firewall is enabled, the
Packet Filter will be used to filter packets based-on Applications (Port) or IP addresses.
General Setting
VC, known as Virtual Circuit or Virtual Channel, is a virtual path in which a communication session is
established. Check with your ISP for information.
Figure 4-4. Firewall – General Setting
Note
Any remote user who is attempting to perform this action may result in blocking all the accesses
to configure and manage of the device from the Internet.
Parameter Description
Security
Disable or activate the Firewall function.
Policy
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 add their own filter rules for
further access to the Internet.
High/Medium/Low security level: the predefined port filter rules for High,
Medium and Low security are displayed in Port Filters of Packet Filter.
Block WAN Request
This is a stand-alone function and not related to whether security is enabled or
disabled. Mostly it is for preventing any scan tools from WAN site initiated by a
hacker.
Click Apply and then click Next to process.
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