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PRG AV4202N
© (2007) Pirelli Broadband Solutions S.p.A. All Rights Reserved. Proprietary Use Pursuant to Cover Page Instructions.
Network Connections Section
OGU 930500275-A1
59
FIGURE 16.
WAN DSL >> Settings Panel
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PRG AV4202N
© (2007) Pirelli Broadband Solutions S.p.A. All Rights Reserved. Proprietary Use Pursuant to Cover Page Instructions.
60
OGU 930500275-A1
Network Connections Section
Page 68 / 182
© (2007) Pirelli Broadband Solutions S.p.A. All Rights Reserved. Proprietary Use Pursuant to Cover Page Instructions.
Security Section
OGU 930500275-A1
61
Security Section
Security
Section
This chapter will describe the
Security Section
accessible from the
Home
Page
of the
PRG AV4202N
.
Be aware that any configuration changes could compromise your connectivity.
The Router's gateway security suite includes comprehensive and robust secu-
rity services: Stateful Packet Inspection Firewall, user authentication protocols
and password protection mechanisms. These features together allow users to
connect their computers to the Internet and simultaneously be protected from
the security threats of the Internet.
The firewall has been exclusively tailored to the needs of the residential/office
user and has been pre-configured to provide optimum security.
The Router's firewall provides both the security and flexibility that home and of-
fice users seek. It provides a managed, professional level of network security
while enabling the safe use of interactive applications, such as Internet gaming
and video-conferencing.
Additional features, including surfing restrictions and access control, can also
be easily configured locally by the user through a user-friendly Web-based inter-
face, or remotely by a service provider.
The Router firewall supports advanced filtering, designed to allow comprehen-
sive control over the Firewall’s behavior. You can define specific input and out-
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PRG AV4202N
© (2007) Pirelli Broadband Solutions S.p.A. All Rights Reserved. Proprietary Use Pursuant to Cover Page Instructions.
62
OGU 930500275-A1
Security Section
put rules, control the order of logically similar sets of rules and make a distinc-
tion between rules that apply to WAN and LAN network devices.
GENERAL
Use the 'General' screen to configure the gateway's basic security settings.
The firewall regulates the flow of data between the home network and the Inter-
net. Both incoming and outgoing data are inspected and then either accepted
(allowed to pass through the Router) or rejected (barred from passing through
the Router) 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 re-
quest is permitted to pass, then all subsequent data associated with this request
(a “session”) will also be allowed to pass, regardless of its direction.
For example, when you point your Web browser to a Web page on the Internet,
a request is sent out to the Internet for this page. When the request reaches the
Router the firewall will identify the request type and origin - HTTP and a specific
PC in your home network, in this case. Unless you have configured access con-
trol to block requests of this type from this computer, the firewall will allow this
request to pass out onto the Internet. When the Web page is returned from the
Web server the firewall will associate it with this session and allow it to pass,
regardless of whether HTTP access from the Internet to the home network is
blocked or permitted.
The important thing to note here is that it is the origin of the request, not subse-
quent responses to this request, that determines whether a session can be es-
tablished or not. You may choose from among three pre-defined security levels
for the Router: Minimum, Typical, and Maximum (the default setting). The table
below summarizes the behavior of the Router for each of the three security lev-
els.
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PRG AV4202N
© (2007) Pirelli Broadband Solutions S.p.A. All Rights Reserved. Proprietary Use Pursuant to Cover Page Instructions.
Security Section
OGU 930500275-A1
63
TABLE 1.
Security Levels
Security Level
Requests Originating
in the WAN (Incoming
Traffic)
Requests Originating in the LAN
(Outgoing Traffic)
Maximum
Security
(Default)
Blocked:
no
access
to
home network from Inter-
net, except as configured
in
the
Port
Forwarding,
DMZ
host
and
Remote
Access screens
Limited: by default, only commonly-used
services, such as Web browsing and e-
mail, are permitted
Typical Security
Blocked:
no
access
to
home network from Inter-
net, except as configured
in
the
Port
Forwarding,
DMZ
host
and
Remote
Access screens
Unrestricted: all services are permitted,
except as configured in the Access Con-
trol screen
Minimum Security
Unrestricted:
permits
full
access
from
Internet
to
home network; all connec-
tion attempts permitted.
Unrestricted: all services are permitted,
except as configured in the Access Con-
trol screen
FIGURE 1.
Security General panel

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