CHAPTER-3
D-Link GLB-802C ADSL2+ Router User Manual 22
3.3.7.3 IP FILTERING
The IP filter feature enables to create rules that control the forwarding of incoming and outgoing data
between the LAN and the Internet and within the LAN. It is possible to create IP filter rules to block
attempts by certain computers on the LAN to access certain types of data or Internet locations and also
block incoming access to computers on the LAN.
When an IP filter rule is defined and the feature is enabled, router examines data packets to determine
whether they meet criteria set forth in the rule. The criteria can include the network or internet protocol
the packet carries, the direction in which it is traveling (for example, from the LAN to the Internet or vice
versa), the IP address of the sending computer, the destination IP address, and other characteristics of the
packet data.
If the packet matches the criteria established in a rule, the packet can either be accepted (forwarded
towards its destination), or denied (discarded), depending on the action specified in the rule.
a. Configuring IP Filter Global Settings
The IP Filter Configuration page enables to configure the following global IP filter settings.
• Security Level: This setting determines which IP filter rules take effect, based on the security level
specified in each rule. For example, when High is selected, only those rules that are assigned a
security value of High will be in effect. The same is true for the Medium and Low settings. When
“None” is selected, IP filtering is disabled.
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