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Protecting Your Network
3-1
v1.0, February 2008
Chapter 3
Protecting Your Network
This chapter describes how to control access to your gateway and how to use the firewall features
of the gateway to protect your network.
Changing Passwords
For security reasons, the gateway has its own user names and passwords. The login user name is
admin
, with the default password of
password
. The Numericable user name is
MSO
with the
default password of
changeme
. After a period of inactivity for a set length of time, the
administrator login automatically disconnects. You can change the password, and you can change
the amount of time for the administrator login timeout.
NETGEAR recommends that you change these passwords to more secure passwords. The ideal
passwords should contain no dictionary words from any language, and should be a mixture of both
upper and lower case letters, numbers, and symbols. Your passwords can be up to 30 characters.
To change a password:
1.
Log in to the gateway by entering the default LAN address of
with a default
user name, or using whatever password and LAN address you have chosen for the gateway.
2.
Under the Maintenance heading, select Set Password. The Set Password screen displays:
Note:
The user names and passwords are not the same as any user name or password your
may use to log in to your Internet connection.
Figure 3-1
Page 42 / 82
Wireless Cable Voice Gateway Model CBVG834G Adminstrators User Manual
3-2
Protecting Your Network
v1.0, February 2008
3.
To change the password, first enter the old password, and then enter the new password twice.
4.
Click
Apply
to save your changes.
Logs
A log is a detailed record of the denial of service (DoS) attacks directed at your network. You can
view the logs here, or you can use e-mail notification to view the logs (see
“Viewing and Emailing
Event Logs” on page 4-4
).
From the main menu, select Logs. The Logs screen displays:
Note:
After changing the password, you will be required to log in again to continue
the configuration. If you have backed up the gateway settings previously, you
should do a new backup so that the saved settings file includes the new
password.
Note:
You must be logged in with the user name
MSO
to view the Logs screen.
Figure 3-2
Page 43 / 82
Wireless Cable Voice Gateway Model CBVG834G Adminstrators User Manual
Protecting Your Network
3-3
v1.0, February 2008
Blocking Keywords, Sites and Services
The gateway provides a variety of options for blocking Internet content and communications to the
gateway. You can control access to Internet content by screening for keywords within Web
addresses; you also can block access to all sites except those that are explicitly allowed. Blocking
options include:
•
Blocking access from your LAN to Internet locations that contain keywords that your specify.
•
Blocking access to websites (domains) that you specify as off-limits.
•
Allowing access to only websites (domains) that you specify as allowed.
You can block access to the Internet by a specific computer based on the hardware MAC address
of that computer. See
“Using MAC Filtering to Block Access” on page 3-7
.
Blocking Keywords and Domains
You can restrict access to Internet content based on Web address keywords and domain names. A
domain name is the name of a particular website. For example, for the address www.netgear.com,
the domain name is NETGEAR.com.
To configure Block Sites:
1.
Log in to the gateway by entering the default LAN address of
the parent
user name of
MSO
, and default password of
changeme
or use whatever password and LAN
address you have chosen for the gateway in parent mode.
Note:
To configure Block Sites, you must be logged in as
MSO
.
Page 44 / 82
Wireless Cable Voice Gateway Model CBVG834G Adminstrators User Manual
3-4
Protecting Your Network
v1.0, February 2008
2.
Click Block Sites under the Content Filtering heading on the main menu.
Keywords
To enable keyword blocking:
1.
On the Block Sites screen, select the
Enable
check box in the Keyword section.
2.
Add keywords by entering them into the Add Keyword List. An example of some Keyword
applications are:
•
If the keyword “XXX” is specified, the URL “http://www.badstuff.com/xxx.html” is
blocked.
•
If the keyword “.com” is specified, only Web sites with other domain suffixes (such as
.edu or .gov) can be viewed.
•
If the keyword “.” is specified, all Internet browsing access is blocked.
Up to eight entries are supported in the Keyword List.
3.
When you have completed your entries, click
Add Keyword
.
Figure 3-3
Page 45 / 82
Wireless Cable Voice Gateway Model CBVG834G Adminstrators User Manual
Protecting Your Network
3-5
v1.0, February 2008
Domain Blocking
To enable domain blocking:
1.
Select the
Enable
radio box adjacent to Domain Blocking.
2.
Enter the Domain Name of the site name you want to block in the
Domain List
field.
If the domain “badstuff.com” is specified, the URL “http://www.badstuff.com/xxx.html” will
be blocked, along with all other URLs in the badstuff.com site.
Up to eight entries are supported in the
Domain List
.
3.
When you have completed your entries, click
Add Domain
.
4.
Click
Apply
to save your settings
To delete a an entry in either the Keyword List or Domain List field:
1.
Select it from the list, and click
Remove Keyword
or click
Remove Domain
.
2.
Click
Apply
to save your settings.
Blocking Access by Time of Day
The default blocking schedule is to block access all day. However, you can also block access
according to a daily schedule for each PC individually.
To block access for a PC:
1.
In the MAC Filtering screen, select the PC for which the schedule will be modified.
2.
In the Day(s) to Block section, select the check boxes next to the days when you want access
blocked.
3.
In the Time of Day to Block section, select either
All Day
, or set the hours for Internet
blocking
4.
Click
Apply
to activate the settings.

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