Security - Digisol DG-BG1100U User Manual

4.4.4 Security

Security is an important function of DSL. It protects resources of a private network from
users from other networks, and prevents unauthorized Internet users from accessing
private networks connected to the Internet. All messages entering or leaving the
intranet (that is, the local network to which you are connected) must pass through the
security checks, which checks each message and blocks those that do not meet the
specific security criteria.
There are two basic types of security techniques:
IP packet filtering: The system checks each packet entering or leaving the
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network and accepts or rejects it based on user-defined rules. Packet filtering is
fairly effective and transparent to users, but is difficult to configure.
Parental Control: The system checks each frame entering or leaving the network
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from layer 2. It accepts and rejects frames according to user-defined rules.
Choose Security > IP Filtering and the following page appears. By default, the firewall
is enabled. The firewall is used to block document transmissions between the Internet
and your PC. It serves as a safety guard and permits only authorized documents to be
sent to the LAN.
Note: If the router is configured to bridge mode only, IP filtering is disabled and the IP
filtering interface does not appear.
If no PVC of Bridge mode is configured, MAC filtering is disabled and the MAC
Filtering interface does not appear.
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