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/ CONFIGURING
SECURITY SETTINGS
Additional features, including surfing restrictions and access control,
can also be configured locally through the user interface or remotely
by a service provider.
The firewall regulates the flow of data between the local network
and the Internet. Both incoming and outgoing data are inspected,
then either accepted and allowed to pass through your Fios Router
or rejected and barred from passing through your Fios Router,
according to a flexible and configurable set of rules. These rules
are designed to prevent unwanted intrusions from the outside, while
allowing local network users access to Internet services.
The firewall rules specify the type of services on the Internet that
are accessible from the local network and types of services in the
local network that are accessible from the Internet.
Each request for a service that the firewall receives is checked
against the firewall rules to determine whether the request should
be allowed to pass through the firewall. If the request is permitted to
pass, all subsequent data associated with this request or session is
also allowed to pass, regardless of its direction.
For example, when accessing a website on the Internet, a request
is sent to the Internet for this site. When the request reaches your
Fios Router, the firewall identifies the request type and origin, such
as HTTP and a specific computer in the local network. Unless your
Fios Router is configured to block requests of this type from this
computer, the firewall allows this type of request to pass to the
Internet.
When the website is returned from the web server, the firewall
associates the website with this session and allows it to pass;
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