MP-20x Telephone Adapter 178 Document #: LTRT-50609
User's Manual
The 'Website Restrictions' allows you to block LAN access to a certain host or web
site on the Internet (refer to 'Website Restrictions' on page 189).
'Advanced Filtering' allows you to implicitly control the firewall setting and rules (refer
to 'Advanced Filtering' on page 196).
'Security Log' allows you to view and configure the firewall Log (refer to Security Log).
13.1 General Security Level Settings
Use the 'Security Settings' screen to configure the Telephone Adapter's basic security
settings.
Figure 13-2: General Security Level Settings
The firewall regulates the flow of data between the home network and the Internet. Both
incoming and outgoing data are inspected and then either accepted (allowed to pass
through MP-20x) or rejected (barred from passing through MP-20x) according to a flexible
and configurable set of rules. These rules are designed to prevent unwanted intrusions
from the outside, while allowing home users access to the Internet services that they
require.
The firewall rules specify what types of services available on the Internet may be accessed
from the home network and what types of services available in the home network may be
accessed from the Internet. Each request for a service that the firewall receives, whether
originating in the Internet or from a computer in the home network, is checked against the
set of firewall rules to determine whether the request should be allowed to pass through the
firewall. If the request is permitted to pass, then all subsequent data associated with this
request (a "session") are also allowed to pass, regardless of its direction.
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