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Configure Advanced Settings
4042831 Rev A
43
Configuring MAC Address Filters
Use the Setup Advanced Settings - MAC Filtering page to configure MAC address
filters. These filters allow you to deny or block access to the Internet by the
individual MAC addresses listed in the table. You can also prevent individual PCs
from sending outgoing TCP/UDP traffic to the WAN using their MAC address.
Note:
If you are not familiar with the advanced settings detailed in this section,
contact your service provider before you attempt to change any of the residential
gateway default advanced MAC filtering settings.
Click
MAC Address Filtering
in the Advanced Settings section of the Setup page to
access the Setup Advanced Settings - MAC Filtering page.
Setup Advanced Settings - MAC Filtering Page
The following illustration is an example of the Setup Advanced Settings - MAC
Filtering page.
Setup Advanced Settings - MAC Filtering Page Description
Use this link to enter the MAC address or MAC addresses of devices whose Internet
access you want to control. Click
Apply
to apply and save your new MAC address
filter settings.
Page 62 / 130
Chapter 3
Configuring the DOCSIS Residential Gateway
44
4042831 Rev A
Setting Up MAC Address Filters
The Block/Pass drop down menu allows you to block or pass Internet access to the
MAC addresses of the devices you list in the MAC Address Filters table. The
following table describes the function of the Block/Pass drop down menu.
Field Name
Description
Block Listed (Default)
Select
Block
to deny Internet access to the MAC addresses of
the devices you list in the table. All other MAC addresses will
be allowed Internet access.
Pass
Select
Pass
to allow Internet access only to the MAC addresses
of the devices you list in the table. Any MAC addresses
not
listed in the table will be denied Internet access.
Function Keys
The following function keys appear on the Advanced Settings - MAC Filtering page.
Key
Description
Apply
Saves the values you enter into the fields without closing the
screen.
Add MAC Address
Saves the MAC Address entered in the associated text field.
Remove MAC Address
Removes the selected MAC address.
Clear All
Removes all defined MAC addresses .
Configuring and Enabling TCP and UDP Port Filters
Use the Setup Advanced Settings - Port Filtering page to configure and enable TCP
and UDP port filters. These filters prevent a range of TCP/UDP ports from accessing
the Internet. You can also prevent PCs from sending outgoing TCP/UDP traffic to
the WAN on specific IP port numbers. This filter is not IP address- or MAC address-
specific. The system blocks the specified port ranges for all PCs.
Note:
If you are not familiar with the advanced settings detailed in this section,
contact your service provider before you attempt to change any of the residential
gateway default advanced port filtering settings.
Click
Port Filtering
in the Advanced Settings section of the Setup page to access the
Setup Advanced Settings - Port Filtering page.
Page 63 / 130
Configure Advanced Settings
4042831 Rev A
45
Setup Advanced Settings - Port Filtering Page
The following illustration is an example of the Setup Advanced Settings - Port
Filtering page.
Setup Advanced Settings - Port Filtering Page Description
Use this link to enter and enable the desired port filtering ranges and protocols in the
appropriate fields and then click
Apply
to apply and save your new port filtering
settings.
Configuring Port Forwarding for Local IP Addresses
Use the Setup Advanced Settings - Port Forwarding page to configure port
forwarding for local IP addresses. Port forwarding allows you to run a server on the
LAN by specifying the mapping of TCP/UDP ports to a local PC. You must also set
up a fixed private LAN IP address for the destination device.
Note:
If you are not familiar with the advanced settings detailed in this section,
contact your service provider before you attempt to change any of the residential
gateway default advanced port forwarding settings.
Click
Port Forwarding
in the Advanced Settings section of the Setup page to access
the Setup Advanced Settings - Port Forwarding page.
Page 64 / 130
Chapter 3
Configuring the DOCSIS Residential Gateway
46
4042831 Rev A
Setup Advanced Settings - Port Forwarding Page
The following illustration is an example of the Setup Advanced Settings - Port
Forwarding page.
Setup Advanced Settings - Port Forwarding Page Description
The following example illustrates how to use the port forwarding feature to
configure the Microsoft X-Box Online Live for Internet gaming.
Note:
For most widely used applications (including Microsoft X-Box Online Live),
the built-in firewall automatically maps and opens ports required for that
application while the application is in use.
1
Set the device to be used for port forward to a fixed IP address, for example,
192.168.0.5
.
2
In the first entry of the Port Forwarding area of the page, enter the same IP
address (192.168.0.5) in the Local IP Address field.
3
In the same row, enter the appropriate port numbers in the Start Port and End
Port fields.
4
In the same row, select the appropriate protocol from the drop-down list in the
Protocol field, and then select the box in the
Enable
field.
5
To add additional ports, repeat steps 1 through 4, and then go to step 6.
6
Click
Apply
to apply and save your new port forwarding settings.
Page 65 / 130
Configure Advanced Settings
4042831 Rev A
47
Configuring TCP/UDP Port Triggers
Use the Setup Advanced Settings - Port Triggers page to configure TCP/UDP port
triggers. Port triggering is similar to port forwarding but is dynamic. In other words,
the system does not hold the ports open indefinitely. For example, when the
residential gateway detects outgoing data on a specific IP port number set in the
―Trigger Range,‖ the resulting ports set in the ―Target Range‖ will open for
incoming data. If the
system detects no outgoing traffic on the ―Trigger Range‖ ports
for a period of 10 minutes, the ―Target Range‖ ports close. This is a safer method for
opening specific ports for special applications, such as, video conferencing
programs, interactive gaming, and file transfer in chat programs. This is safe because
the ports are dynamically triggered and not held open continuously or left open
erroneously by the router administrator. Therefore, these ports are not exposed and
vulnerable for potential hackers to discover.
Note:
If you are not familiar with the advanced settings detailed in this section,
contact your service provider before you attempt to change any of the residential
gateway default advanced port triggers settings.
Click
Port Triggers
in the Advanced Settings section of the Setup page to access the
Setup Advanced Settings - Port Triggers page.

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