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Page 51 / 134 Scroll up to view Page 46 - 50
43
Chapter 6: Setting Up and Configuring the Router
Wireless Tab
Wireless-N Gigabit Security Router with VPN
WPA2-Enterprise Mixed
This security mode supports the transition from WPA-Enterprise to WPA2-Enterprise. You can have client devices
that use either WPA-Enterprise or WPA2-Enterprise. The Wireless Router will automatically choose the encryption
algorithm used by each client device.
RADIUS Server IP Address
. Enter the RADIUS server’s IP address.
RADIUS Server Port
. Enter the port number used by the RADIUS server. The default is 1812.
WPA Algorithms
. Mixed Mode automatically chooses TKIP or AES for data encryption.
Shared Secret
. Enter the Shared Secret key used by the Wireless Router and RADIUS server.
Key Renewal Timeout
. Enter a Key Renewal Timeout period, which instructs the Wireless Router how often it
should change the encryption keys. The default is
3600
seconds.
WEP
This security mode is defined in the original IEEE 802.11. This mode is not recommended now due to its weak
security protection. Users are urged to migrate to WPA or WPA2.
Authentication Type.
Choose the 802.11 authentication type as either
Open System
or
Shared Key
. The default
is
Open System
.
Default Transmit Key
. Select the key to be used for data encryption.
WEP Encryption
. Select a level of WEP encryption,
64 bits (10 hex digits)
or
128 bits (26 hex digits)
.
Passphrase
. If you want to generate WEP keys using a Passphrase, then enter the Passphrase in the field
provided and click the
Generate
key.
Key 1-4
. If you want to manually enter WEP keys, then complete the fields provided. Each WEP key can consist of
the letters “A” through “F” and the numbers “0” through “9”. It should be 10 characters in length for 64-bit
encryption or 26 characters in length for 128-bit encryption.
Tx Key
. Select one of the keys to be used for data encryption (when you manually enter multiple WEP keys).
Change these settings as described here and click
Save Settings
to apply your changes, or click
Cancel
Changes
to cancel your changes. Help information is displayed on the right-hand side of the screen, and click
More
for additional details.
Figure 6-25: Wireless - Wireless Security (WEP)
Figure 6-24: Wireless - Wireless Security
(WPA2-Enterprise Mixed)
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44
Chapter 6: Setting Up and Configuring the Router
Wireless Tab
Wireless-N Gigabit Security Router with VPN
Wireless Connection Control
This screen allows you to configure the Connection Control List to either permit or block specific wireless client
devices connecting to (associating with) the Wireless Router.
Wireless Connection Control
Enabled
/
Disabled
. Enable or disable wireless connection control. The default is
Disabled
.
Connection Control
There are two ways to control the connection (association) of wireless client devices. You can either
prevent
specific devices from connecting to the Wireless Router, or you can
allow
only specific client devices to connect
to the Wireless Router. The client devices are specified by their MAC addresses. The default is to
allow
only
specific client devices.
Wireless Client List
Instead of manually entering the MAC addresses of each client, the Wireless Router provides a convenient way to
select a specific client device from the client association table. Click this button and a window appears to let you
select a MAC address from the table. The selected MAC address will be entered into the Connection Control List.
Connection Control List
MAC 01-20
. Enter the MAC addresses of the wireless client devices you want to control.
Change these settings as described here and click
Save Settings
to apply your changes, or click
Cancel
Changes
to cancel your changes. Help information is displayed on the right-hand side of the screen.
Figure 6-27: Select MAC Address from Wireless
Client List
Figure 6-26: Wireless - Wireless Connection
Control
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45
Chapter 6: Setting Up and Configuring the Router
Wireless Tab
Wireless-N Gigabit Security Router with VPN
Advanced Wireless Settings
This screen allows you to configure the advanced settings for the Wireless Router. The Wireless-N Router adopts
several new parameters to adjust the channel bandwidth and guard intervals to improve the data rate
dynamically. Linksys recommends to let your Wireless Router automatically adjust the parameters for maximum
data throughput.
Advanced Wireless
You can change the following advanced parameters (some only for Wireless-N) for this Wireless Router.
Wireless-N data rates are classified into 16
MCS
numbers (0-15).
MCS
stands for Modulation and Coding
Scheme. For the same
MCS
number, the data rate changes according to the Channel Bandwidth and Guard
Interval settings. You can see the change through the drop-down menu of
Tx Rate Limiting (11n clients)
.
Channel Bandwidth
. You can select the channel bandwidth manually for Wireless-N connections. When it is set
to 20MHz, only the 20MHz channel is used. When it is set to 40MHz, Wireless-N connections will use 40MHz
channel but Wireless-B and Wireless-G will still use 20MHz channel. The default is
Auto
.
Guard Interval
. You can select the guard interval manually for Wireless-N connections. The two options are
Short
(400ns)
and
Long
(800ns)
. The default is
Auto
.
Tx Rate Limiting
(
11b clients
). This option provides rate limiting on Wireless-B connections. Wireless-B clients
can be limited to data rate specified by IEEE 802.11b. The default is
Auto
.
Tx Rate Limiting
(
11g clients
). This option provides rate limiting on Wireless-G connections. Wireless-G clients
can be limited to data rates specified by IEEE 802.11g and 802.11b. The default is
Auto
.
Tx Rate Limiting
(
11n clients
). This option provides rate limiting on Wireless-N connections. Wireless-N clients
can be limited to data rates specified by draft IEEE 802.11n, IEEE 802.11g, and 802.11b. The data rate associated
with each
MCS
number (0-15) changes according to your selection on Channel Bandwidth and Guard Interval.
The default is
Auto
.
CTS Protection Mode
. CTS (Clear-To-Send) Protection Mode function boosts the Wireless Router’s ability to
catch all wireless transmissions, but will severely decrease performance. Keep the default setting,
Auto
, so the
Wireless Router can use this feature as needed, when the Wireless-N/G products are not able to transmit to the
Wireless Router in an environment with heavy 802.11b traffic. Select
Disabled
if you want to permanently disable
this feature.
WMM
. Wi-Fi Multimedia is a QoS feature defined by WiFi Alliance before IEEE 802.11e was finalized. Now it is
part of IEEE 802.11e. When it is enabled, it provides four priority queues for different types of traffic. It
automatically maps the incoming packets to the appropriate queues based on QoS settings (in IP or layer 2
Figure 6-28: Wireless - Advanced Wireless
Settings
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46
Chapter 6: Setting Up and Configuring the Router
Wireless Tab
Wireless-N Gigabit Security Router with VPN
header). WMM provides the capability to prioritize traffic in your environment. The default in
Enabled
. Select
High Performance (N-Only)
if you want to achieve highest throughput on 11n connections. Note that 11b and
11g clients performance will be affected by setting to this mode.
IOT Mode
. Interoperability Mode. Enabling this mode will help this AP to communicate with Linksys retail client
cards (e.g. WPC300N) at 11n rates. This mode is a temporary measure to cope with implementation differences
on 802.11n draft specification. This option will be removed eventually when IEEE802.11n is finalized. The default
is
disabled
.
Beacon Interval.
This value indicates the frequency interval of the beacon. A beacon is a packet broadcast by
the Wireless Router to keep the network synchronized. A beacon includes the wireless networks service area, the
Wireless Router address, the Broadcast destination addresses, a time stamp, Delivery Traffic Indicator Maps, and
the Traffic Indicator Message (TIM). The default is
100
ms.
DTIM Interval
. This value indicates how often the Wireless Router sends out a Delivery Traffic Indication
Message (DTIM). Lower settings result in more efficient networking, while preventing your PC from dropping into
power-saving sleep mode. Higher settings allow your PC to enter sleep mode, thus saving power, but interferes
with wireless transmissions. The default is
1
ms.
RTS Threshold.
This setting determines how large a packet can be before the Wireless Router coordinates
transmission and reception to ensure efficient communication. This value should remain at its default setting of
2347
. If you encounter inconsistent data flow, only minor modifications are recommended.
Change these settings as described here and click
Save Settings
to apply your changes, or click
Cancel
Changes
to cancel your changes. Help information is displayed on the right-hand side of the screen, and click
More
for additional details.
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47
Chapter 6: Setting Up and Configuring the Router
Firewall Tab
Wireless-N Gigabit Security Router with VPN
Firewall Tab
The Firewall Tab allows you to configure software security features like SPI (Stateful Packet Inspection) Firewall,
IP based Access List, restriction LAN users on Internet (WAN port) access, and NAPT (Network Address Port
Translation) Settings (only works when NAT is enabled) to limited services to specific ports.
Note that for WAN traffic, NAPT settings are applied first, then it will pass the SPI Firewall settings, followed by IP
based Access List (which requires more CPU power).
Basic Settings
Firewall
: SPI (Stateful Packet Inspection) Firewall, when you enable this feature, the Router will perform deep
packet inspection on all the traffic going through the Router and drop the packets that do not follow the
pre-defined protocol behavior. The default is
Enable
.
DoS Protection
: When enabled, the Router will prevent DoS (Denial of Service) attacks coming in from the
Internet. DOS attacks are making your Router’s CPU busy such that it cannot provide services to regular traffic.
The default Is
Enable
.
Block WAN Request
: When enabled, the Router will ignore PING Request from the Internet so it seems to be
hidden. The default is
Enable
.
Remote Management
: When enabled, the Router will allow the Web-based Utility to be accessed from the
Internet. The default is
Disable
.
HTTPS
: This option is only useful when
Remote Management
is enabled. When enabled, the Web based Utility
can be accessed only through HTTPS session from WAN side instead of regular HTTP. This will have your remote
Web session protected by SSL encryption algorithms. The default is
Enable
.
Multicast Pass-through
: When enabled, the Router will allow IP Multicast traffic to come in from the Internet.
The default is
Disable
.
MTU
: Set your data packet maximum size at the IP layer manually or automatically from negotiation. The
maximum size on Ethernet is 1500 bytes. The default is
auto
.
Figure 6-29: Firewall - Basic Settings
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