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Configure Firewall Settings
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Setup Firewall - Options Page (Off)
When the SPI firewall is completely disabled, a page similar to the following
appears.
SetupFirewall - Options Page (Low)
When the SPI firewall is enabled with no ports restricted, a page similar to the
following appears.
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Chapter 3
Configuring the DOCSIS Residential Gateway
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Setup Firewall - Options Page (Medium)
When the SPI firewall is enabled with a list of Allowed Services that are allowed
through the firewall, a page similar to the following appears.
Setup Firewall - Options Page (High)
When the SPI firewall is enabled with a shortened list of Allowed Services that are
allowed through the firewall, a page similar to the following appears.
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Configure Firewall Settings
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Setup Firewall - Options Pages Description
This section describes the section headings and fields descriptions of the Setup
Firewall - Options pages.
Note:
If you make changes in any of the fields in a Setup Firewall - Options page,
click
Apply
to apply and save your Firewall settings.
The following table provides a description of each field name within the Setup
Firewall - Options page.
Field Name
Description
Filter Proxy
Enables/disables proxy
Filter Cookies
Enables/disables cookie blocking. This feature filters the
unsolicited delivery of cookies to devices from the Internet to
devices in your private local network. Cookies are computer files
that contain personal information or web surfing behavior data.
Filter Java Applets
Enables/disables java applets. This feature helps to protect the
devices in your private network from irritating or malicious Java
applets that are sent, unsolicited, to devices in your private
network from the Internet. These applets run automatically when
they are received by a PC.
Filter ActiveX
Enables/disables ActiveX controls. This feature helps to protect the
devices in your private network from irritating or malicious
ActiveX controls that are sent, unsolicited, to devices in your
private network from the Internet. These ActiveX controls run
automatically when they are received by a PC.
Filter Popup Windows
Enables/disables popup windows. Some commonly used
applications employ popup windows as part of the application. If
you disable popup windows, it may interfere with some of these
applications.
Block Fragmented IP
Packets
Enables/disables filtering of fragmented IP packets. This feature
helps protect your private local network from Internet based denial
of service attacks.
Port Scan Detection
Enables/disables the gateway from responding to Internet based
port scans. This feature is designed to protect your private local
network from Internet based hackers who attempt to gain
unsolicited access your network by detecting open IP ports on your
gateway.
IP Flood Detection
Blocks malicious devices that are attempting to flood devices or
networks with illegal broadcast packets. Also referred to as
―broadcast storm.‖ The default setting is OFF.
Firewall Protection
Enables/disables the firewall. When the firewall is enabled, the
firewall will allow most commonly used applications to
automatically open IP ports and pass data without any special
setup or manual port configuration.
Page 84 / 130
Chapter 3
Configuring the DOCSIS Residential Gateway
66
4042831 Rev A
Setup Firewall - Options Page Description
This section describes the section headings and fields descriptions of the Setup
Firewall - Options page.
Note:
If you make changes in any of the fields in the Setup Firewall - Options page,
click
Apply
to apply and save your Firewall settings.
The following table provides a description of each field name within the Setup
Firewall - Options page.
Field Name
Description
Filter Proxy
Enables/disables proxy
Filter Cookies
Enables/disables cookie blocking. This feature filters the
unsolicited delivery of cookies to devices from the Internet to
devices in your private local network. Cookies are computer files
that contain personal information or web surfing behavior data.
Filter Java Applets
Enables/disables java applets. This feature helps to protect the
devices in your private network from irritating or malicious Java
applets that are sent, unsolicited, to devices in your private
network from the Internet. These applets run automatically when
they are received by a PC.
Filter ActiveX
Enables/disables ActiveX controls. This feature helps to protect the
devices in your private network from irritating or malicious
ActiveX controls that are sent, unsolicited, to devices in your
private network from the Internet. These ActiveX controls run
automatically when they are received by a PC.
Filter Popup Windows
Enables/disables popup windows. Some commonly used
applications employ popup windows as part of the application. If
you disable popup windows, it may interfere with some of these
applications.
Block Fragmented IP
Packets
Enables/disables filtering of fragmented IP packets. This feature
helps protect your private local network from Internet based denial
of service attacks.
Port Scan Detection
Enables/disables the gateway from responding to Internet based
port scans. This feature is designed to protect your private local
network from Internet based hackers who attempt to gain
unsolicited access your network by detecting open IP ports on your
gateway.
IP Flood Detection
Blocks malicious devices that are attempting to flood devices or
networks with illegal broadcast packets. Also referred to as
―broadcast storm.‖
Firewall Protection
Enables/disables the firewall. When the firewall is enabled, the
firewall will allow most commonly used applications to
automatically open IP ports and pass data without any special
setup or manual port configuration.
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Configure Firewall Settings
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Configuring Firewall Event Logging and E-mail Alerts
Use the Setup Firewall - Event Logging page to access the firewall event log and
allows you to enter your e-mail address in order for you to receive e-mail alerts
related to firewall attacks by hackers.
Note:
If you are not familiar with the settings detailed in this section, contact your
service provider before you attempt to change any of the residential gateway default
firewall event logging settings.
Click
Event Logging
in the Firewall section of the Setup page to access the Setup
Firewall - Event Logging page.
Setup Firewall - Event Logging Page
The following illustration is an example of the Setup Firewall - Event Logging page.
Setup Firewall - Event Logging Page Description
The Setup Firewall - Event Logging page shows events captured by the firewall. The
log displays the following items:
Description of the event
Number of events that have occurred
Last occurrence of an event
Target and source addresses

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