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Chapter 5: Configuring the Wireless-N Broadband Router
The Wireless Tab - Wireless Security
Wireless-N Broadband Router
RADIUS
This option features WEP used in coordination with a RADIUS server. (This should only be used when a RADIUS
server is connected to the Router.)
RADIUS Server
. Enter the IP address of your RADIUS server.
RADIUS Port
. Enter the port number of your RADIUS server.
Shared Key
. Enter the key shared by the Router and RADIUS server.
Encryption
. Select the appropriate level of encryption,
40/64-bit (10 hex digits)
or
128-bit (26 hex digits)
,
which is stronger encryption than 40/64 bit encryption.
Passphrase
. To automatically generate keys, enter your passphrase. Then click the
Generate
button.
Key 1-4
. If you want to manually enter the WEP keys, then enter them in the
Key 1-4
fields.
TX Key
. To indicate which WEP key to use, select a transmit key number.
When you have finished making changes to this screen, click the
Save Settings
button to save the changes, or
click the
Cancel Changes
button to undo your changes. For more information, click
Help
.
WEP
WEP is a basic encryption method offering two levels of encryption; 128-bit is stronger than 40/64-bit encryption.
Encryption
. Select the appropriate level of encryption,
40/64-bit (10 hex digits)
or
128-bit (26 hex digits)
.
Passphrase
. To automatically generate keys, enter your passphrase. Then click the
Generate
button.
Key 1-4
. If you want to manually enter the WEP keys, then enter them in the
Key 1-4
fields.
TX Key
. To indicate which WEP key to use, select a transmit key number.
When you have finished making changes to this screen, click the
Save Settings
button to save the changes, or
click the
Cancel Changes
button to undo your changes. For more information, click
Help
.
Figure 5-19: Wireless Security - RADIUS
Figure 5-20: Wireless Security - WEP
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26
Chapter 5: Configuring the Wireless-N Broadband Router
The Wireless Tab - Wireless MAC Filter
Wireless-N Broadband Router
The Wireless Tab - Wireless MAC Filter
Wireless access can be filtered by using the MAC addresses of the wireless devices transmitting within your
network’s radius.
Wireless MAC Filter
To filter wireless users by MAC Address, either permitting or blocking access, click
Enabled
. If you do not wish to
filter users by MAC Address, select
Disabled
.
Access Restrictions
Prevent
. Click this button to block wireless access from the devices listed on this screen.
Permit
. Click this button to allow wireless access by the devices listed on this screen.
MAC Address Filter List
Click the
Wireless Client List
button to display the Wireless Client List. It shows computers and other devices on
the wireless network. The list can be sorted by Client Name, Interface, IP Address, MAC Address, and Status. Click
the
Save to MAC Address Filter List
checkbox for any device you want to add to the MAC Address Filter List.
Then click the
Add
button. To retrieve the most up-to-date information, click the
Refresh
button. To exit this
screen and return to the
Wireless MAC Filter
screen, click the
Close
button.
Then click the
Enable MAC Filter
checkbox for any device you want to add to the MAC Address Filter List. To
update the information on this list, click the
Refresh
button. When you have finished making changes to the
Wireless Client MAC List
screen, click the
Update Filter List
button to save the changes. Click the
Close
button
to return to the
Wireless MAC Filter
screen.
When you have finished making changes to the
MAC Address Filter List
screen, click the
Save Settings
button to
save the changes, or click the
Cancel Changes
button to undo your changes.
MAC 01-50
. Enter the MAC addresses of the devices whose wireless access you want to block or allow.
When you have finished making changes to the
Wireless MAC Filter
screen, click the
Save Settings
button to
save the changes, or click the
Cancel Changes
button to undo your changes. For more information, click
Help
.
Figure 5-21: Wireless Tab - Wireless MAC Filter
Figure 5-22: Wireless Client List
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27
Chapter 5: Configuring the Wireless-N Broadband Router
The Wireless Tab - Advanced Wireless Settings
Wireless-N Broadband Router
The Wireless Tab - Advanced Wireless Settings
This tab is used to set up the Router’s advanced wireless functions. These settings should only be adjusted by an
expert administrator as incorrect settings can reduce wireless performance.
Advanced Wireless
AP Isolation
. This isolates all wireless clients and wireless devices on your network from each other. Wireless
devices will be able to communicate with the Router but not with each other. To use this function, click
Enabled
.
AP Isolation is disabled by default.
Authentication Type
. The default is set to
Auto
, which allows either Open System or Shared Key authentication
to be used. Select
Shared Key
if you only want to use Shared Key authentication (the sender and recipient use a
WEP key for authentication).
Basic Rate
. The Basic Rate setting is not actually one rate of transmission but a series of rates at which the
Router can transmit. The Router will advertise its Basic Rate to the other wireless devices in your network, so
they know which rates will be used. The Router will also advertise that it will automatically select the best rate
for transmission. The default setting is
Default
, when the Router can transmit at all standard wireless rates
(1-2Mbps, 5.5Mbps, 11Mbps, 18Mbps, and 24Mbps). Other options are
1-2Mbps
, for use with older wireless
technology, and
All
, when the Router can transmit at all wireless rates.
Transmission Rate
. The rate of data transmission should be set depending on the speed of your wireless
network. You can select from a range of transmission speeds, or you can select
Auto
to have the Router
automatically use the fastest possible data rate and enable the Auto-Fallback feature. Auto-Fallback will
negotiate the best possible connection speed between the Router and a wireless client. The default setting is
Auto
.
N Transmission Rate
. The rate of data transmission should be set depending on the speed of your Wireless-N
networking. You can select from a range of transmission speeds, or you can select
Auto
to have the Router
automatically use the fastest possible data rate and enable the Auto-Fallback feature. Auto-Fallback will
negotiate the best possible connection speed between the Router and a wireless client. The default setting is
Auto
.
CTS Protection Mode
. CTS (Clear-To-Send) Protection Mode’s default setting is
Auto
. The Router will
automatically use CTS Protection Mode when your Wireless-N and Wireless-G products are experiencing severe
problems and are not able to transmit to the Router in an environment with heavy 802.11b traffic. This function
boosts the Router’s ability to catch all Wireless-N and Wireless-G transmissions but will severely decrease
performance.
Figure 5-23: Wireless Tab - Advanced Wireless Settings
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28
Chapter 5: Configuring the Wireless-N Broadband Router
The Wireless Tab - Advanced Wireless Settings
Wireless-N Broadband Router
Beacon Interval
. Enter a value between 20-1000 milliseconds. The Beacon Interval value indicates the
frequency interval of the beacon. A beacon is a packet broadcast by the Router to synchronize the wireless
network. The default value is
100
.
DTIM Interval
. This value, between 1 and 255, indicates the interval of the Delivery Traffic Indication Message
(DTIM). A DTIM field is a countdown field informing clients of the next window for listening to broadcast and
multicast messages. When the Router has buffered broadcast or multicast messages for associated clients, it
sends the next DTIM with a DTIM Interval value. Its clients hear the beacons and awaken to receive the broadcast
and multicast messages. The default value is
1
.
Fragmentation Threshold
. This value specifies the maximum size for a packet before data is fragmented into
multiple packets. If you experience a high packet error rate, you may slightly increase the Fragmentation
Threshold. Setting the Fragmentation Threshold too low may result in poor network performance. Only minor
reduction of the default value is recommended. In most cases, it should remain at its default value of
2346
.
RTS Threshold
. Should you encounter inconsistent data flow, only minor reduction of the default value,
2346
, is
recommended. If a network packet is smaller than the preset RTS threshold size, the RTS/CTS mechanism will
not be enabled. The Router sends Request to Send (RTS) frames to a particular receiving station and negotiates
the sending of a data frame. After receiving an RTS, the wireless station responds with a Clear to Send (CTS)
frame to acknowledge the right to begin transmission. In most cases, keep its default value of
2346
.
When you have finished making changes to this screen, click the
Save Settings
button to save the changes, or
click the
Cancel Changes
button to undo your changes. For more information, click
Help
.
Page 35 / 90
29
Chapter 5: Configuring the Wireless-N Broadband Router
The Security Tab - Firewall
Wireless-N Broadband Router
The Security Tab - Firewall
The
Firewall
screen offers a firewall and filters that block specific Internet data types.
Firewall
Firewall Protection
. A firewall enhances network security and uses Stateful Packet Inspection (SPI) for more
detailed review of data packets entering your network. Select
Enabled
to use a firewall,
or
Disabled
to disable it.
Internet Filter
Filter Anonymous Internet Requests
. When enabled, this feature keeps your network from being “pinged,” or
detected, by other Internet users. It also hides your network ports. Both make it more difficult for outside users to
enter your network. This filter is enabled by default. Select
Disabled
to allow anonymous Internet requests.
Filter Multicast
. Multicasting allows for multiple transmissions to specific recipients at the same time. If
multicasting is permitted, then the Router will allow IP multicast packets to be forwarded to the appropriate
computers. Select
Enabled
to filter multicasting, or
Disabled
to disable this feature.
Filter Internet NAT Redirection
. This feature uses port forwarding to block access to local servers from local
networked computers. Select
Enabled
to filter Internet NAT redirection, or
Disabled
to disable this feature.
Filter IDENT (Port 113)
. This feature keeps port 113 from being scanned by devices outside of your local
network. Select
Enabled
to filter port 113, or
Disabled
to disable this feature.
Web Filter
Proxy
. Use of WAN proxy servers may compromise the Gateway's security. Denying Filter Proxy will disable
access to any WAN proxy servers. To enable proxy filtering, click the checkbox.
Java
. Java is a programming language for websites. If you deny Java, you run the risk of not having access to
Internet sites created using this programming language. To enable Java filtering, click the checkbox.
ActiveX
. ActiveX is a programming language for websites. If you deny ActiveX, you run the risk of not having
access to Internet sites created using this programming language. To enable ActiveX filtering, click the checkbox.
Cookies
. A cookie is data stored on your computer and used by Internet sites when you interact with them. To
enable cookie filtering, click the checkbox.
When you have finished making changes to this screen, click the
Save Settings
button to save the changes, or
click the
Cancel Changes
button to undo your changes. For more information, click
Help
.
Figure 5-24: Security Tab - Firewall

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