Linksys WRT300N Router Manual PDF (Setup & Configuration Guide)

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25

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

.

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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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