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Page 41 / 80 Scroll up to view Page 36 - 40
Wireless Cable Voice Gateway Model CVG834G Reference Manual
Protecting Your Network
3-5
v2.0, November 2007
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.
Enabling or Disabling Content Filtering Services
You can use the Services screen to disable or enable certain gateway features.
Page 42 / 80
Wireless Cable Voice Gateway Model CVG834G Reference Manual
3-6
Protecting Your Network
v2.0, November 2007
From the main menu, select Services. The Services screen appears:
Selecting the check box for a service enables it. Clearing the check box disables the corresponding
service. If you make changes, then you must click
Apply
in order for the changes to take effect.
The services are described as follows:
•
Firewall Features
.
Enabled by default. The gateway will perform stateful packet inspection
(SPI) and protect against Denial of Service (DoS) attacks. .
•
VPN Pass-Through
. Enabled by default. IPSec and PPTP traffic will be forwarded. When it is
disabled, this traffic will be blocked.
•
Multicast.
Enabled by default. The gateway can pass multicasting streams through the
firewall.
•
Web Features
. Disabled by default. If enabled, certain Web-oriented features such as cookies,
java scripts, or pop-up windows will be blocked by the firewall. For example, if you enable
Filter Cookies
, many websites will not allow you to access their site.
Using MAC Filtering to Block Access
By default, any computer has access to the Internet through your gateway. MAC Filtering allows
you to block access to the Internet to any computer on your LAN based on the hardware MAC
address of its Ethernet or wireless adapter.
Figure 3-5
Page 43 / 80
Wireless Cable Voice Gateway Model CVG834G Reference Manual
Protecting Your Network
3-7
v2.0, November 2007
To configure MAC Filtering:
1.
Log in to the gateway at its default LAN address by entering
, the default
user name
admin
, and default password of
password
; or use whatever password and LAN
address you have chosen for the gateway.
2.
Under the Advanced heading on the main menu, select MAC Filtering. The MAC Filtering
screen appears:
The Trusted Devices table is at the top of this screen. It shows devices that are currently connected
to the wireless voice gateway.
To add a device to the Trusted Devices table:
1.
Select a device using one of the following methods:
•
If the device is in the Trusted Devices table, click the radio button of that PC to capture is
MAC address.
•
If the device is not in the Trusted Devices table, you can manually enter the MAC address
of the PC you want to block. If no Device Name appears when you enter its MAC address,
you can type a descriptive name in the
Device Name
field.
2.
Click
Add
. The device appears in the Trusted Devices table.
Figure 3-6
Page 44 / 80
Wireless Cable Voice Gateway Model CVG834G Reference Manual
3-8
Protecting Your Network
v2.0, November 2007
To delete a device from the Trusted Devices table:
1.
Select the MAC address of the PC from the Trusted Devices table.
2.
Click
Delete
to delete the entry.
3.
Click
Apply
to activate the settings.
Inbound and Outbound Rules
You can use firewall rules to block or allow specific traffic passing through from one side to the
other. Inbound rules (WAN to LAN) restrict access by outsiders to private resources, selectively
allowing only specific outside users to access specific resources. Outbound rules (LAN to WAN)
determine what outside resources local users can have access to.
A firewall has two default rules, one for inbound traffic and one for outbound. The default rules of
the gateway are:
•
Inbound:
Block all access from outside except responses to requests from the LAN side.
Instructions for setting up inbound rules can be found in
“Port Forwarding” on page 3-10
•
Outbound:
Allow all access from the LAN side to the outside. Use Port Blocking to set up
outbound rules (see
“Enabling or Disabling Content Filtering Services” on page 3-5
).
You may define more rules that specify exceptions to the default rules. By adding custom rules,
you can block or allow access based on the service or application, source or destination IP
addresses, and time of day.
Port Blocking
You can use Port Blocking to block outbound traffic on specific ports.
Page 45 / 80
Wireless Cable Voice Gateway Model CVG834G Reference Manual
Protecting Your Network
3-9
v2.0, November 2007
To configure port blocking:
1.
Under the Advanced heading on the main menu, select Port Blocking. The Port Blocking
screen displays.
2.
Select the service that you want to block from the
Add Predefined Services
drop-down list. If
the service that you want to block is not in the predefined list, you can add a custom service.
3.
Enter the range of ports that you want to block and select whether the ports are TCP, UDP or
Both.
4.
Enter the Local IP Address for the computer to which this rule will apply.
5.
Click
Add
. The selected service will appear in the Port Filter List
Blocking a Rule by Day or Time
To specify specific days or times to block a rule:.
1.
From the
Port Filter List
, select a rule, and then select the corresponding
Enable
check box.
2.
Select the check box for the
Day(s) to Block
when you want to apply the rule.
3.
For the time of day, either select the
All Day
check box or specify a
Start Time
and
End Time
from the pull-down menus.
Figure 3-7

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