25

Chapter 5: Configuring the Wireless-G Travel Router with SpeedBooster

The Wireless Tab - Advanced Wireless Settings

Wireless-G Travel Router with SpeedBooster

DTIM Interval

. This value 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,

2347

, 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. The RTS Threshold value should remain at its default value

of

2347

.

Change these settings as described here and click the

Save Settings

button to apply your changes or

Cancel

Changes

to cancel your changes. Help information is shown on the right-hand side of the screen.

beacon interval

: data transmitted on your wireless

network that keeps the network synchronized.

fragmentation

: breaking a packet into smaller units

when transmitting over a network medium that

cannot support the original size of the packet.

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Chapter 5: Configuring the Wireless-G Travel Router with SpeedBooster

The Security Tab - Firewall

Wireless-G Travel Router with SpeedBooster

The Security Tab - Firewall

The

Firewall

screen offers Filters and the option to Block WAN Requests. Filters block specific Internet data types

and block anonymous Internet requests. To enable a feature, select

Enabled

from the drop-down menu. To

disable a feature, select

Disabled

from the drop-down menu.

Firewall

•

SPI Firewall Protection. Enable this feature to employ Stateful Packet Inspection (SPI) for more detailed

review of data packets entering your network environment.

•

Filter Anonymous Internet Requests. When enabled, this feature keeps your network from being “pinged,” or

detected, by other Internet users. It also reinforces your network security by hiding your network ports. Both

functions of this feature make it more difficult for outside users to work their way into your network. This

feature 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 Enable to filter multicasting, or Disable to disable this feature.

•

Filter Internet NAT Redirection. This feature uses port forwarding to block access to local servers from local

networked computers. Check the box to enable filter Internet NAT redirection, or uncheck the box to disable

this feature.

•

Web Filters

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.

Change these settings as described here and click the

Save Settings

button to apply your changes or

Cancel

Changes

to cancel your changes. Help information is shown on the right-hand side of the screen.

Figure 5-25: Security Tab - Firewall

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Chapter 5: Configuring the Wireless-G Travel Router with SpeedBooster

The Security Tab - VPN Passthrough

Wireless-G Travel Router with SpeedBooster

The Security Tab - VPN Passthrough

Use the settings on this tab to allow VPN tunnels using IPSec, L2TP, or PPTP protocols to pass through the

Router’s firewall.

VPN Passthrough

IPSec Passthrough

. Internet Protocol Security (IPSec) is a suite of protocols used to implement secure exchange

of packets at the IP layer.

IPSec Pass-Through is enabled by default. To disable IPSec Passthrough, select

Disabled

.

L2TP Passthrough

. Layer 2 Tunneling Protocol is the method used to enable Point-to-Point sessions via the

Internet on the Layer 2 level. L2TP Pass-Through is enabled by default. To disable L2TP Passthrough, select

Disabled

.

PPTP Passthrough

. Point-to-Point Tunneling Protocol (PPTP) allows the Point-to-Point Protocol (PPP) to be

tunneled through an IP network. PPTP Pass-Through is enabled by default. To disable PPTP Passthrough, select

Disabled

.

Change these settings as described here and click the

Save Settings

button to apply your changes or

Cancel

Changes

to cancel your changes. Help information is shown on the right-hand side of the screen.

ipsec

: a VPN protocol used to implement

secure exchange of packets at the IP layer.

pptp

: a VPN protocol that allows the Point to Point

Protocol (PPP) to be tunneled through an IP network.

This protocol is also used as a type of broadband

connection in Europe.

Figure 5-26: Security Tab - VPN Passthrough

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Chapter 5: Configuring the Wireless-G Travel Router with SpeedBooster

The Access Restrictions Tab - Internet Access Policy

Wireless-G Travel Router with SpeedBooster

The Access Restrictions Tab - Internet Access Policy

The

Internet Access Policy

screen allows you to block or allow specific kinds of Internet usage and traffic, such as

Internet access, designated applications, websites, and inbound traffic during specific days and times.

Internet Access Policy

Access Policy

. Access can be managed by a policy. Use the settings on this screen to establish an access policy

(after the

Save Settings

button is clicked). Selecting a policy from the drop-down menu will display that policy’s

settings. To delete a policy, select that policy’s number and click the

Delete This Policy

button. To view all the

policies, click the

Summary

button.

On the

Summary

screen, the policies are listed with the following information: No., Policy Name, Access, Days,

Time, and status (Enabled). You can change the type of access, days, and times of a policy. To activate a policy,

click the

Enabled

checkbox. To delete a policy, click its

Delete

button. Click the

Save Settings

button to save

your changes, or click the

Cancel Changes

button to cancel your changes. To return to the Internet Access Policy

tab, click the

Close

button. To view the list of PCs for a specific policy, click the

PCs List

button.

On the

Internet Access PCs List

screen, you can select a PC by MAC Address or IP Address. You can also enter a

range of IP Addresses if you want this policy to affect a group of PCs. After making your changes, click the

Save

Settings

button to apply your changes or

Cancel Changes

to cancel your changes. Click the

Close

button to exit

this screen.

To create an Internet Access policy:

1.

Select a number from the

Access Policy

drop-down menu.

2.

Enter a Policy Name in the field provided.

3.

To enable this policy, select

Enable

from the

Status

drop-down menu.

4.

Click the

Edit List

button to select which PCs will be affected by the policy. The

Internet Access PCs List

screen will appear. You can select a PC by MAC Address or IP Address. You can also enter a range of IP

Addresses if you want this policy to affect a group of PCs. After making your changes, click the

Save Settings

button to apply your changes or

Cancel Changes

to cancel your changes. Then click the

Close

button.

5.

Click the appropriate option,

Deny

or

Allow

, depending on whether you want to block or allow Internet access

for the PCs you listed on the

List of PCs

screen.

Figure 5-27: Access Restrictions Tab - Internet Access

Policy

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Chapter 5: Configuring the Wireless-G Travel Router with SpeedBooster

The Access Restrictions Tab - Internet Access Policy

Wireless-G Travel Router with SpeedBooster

Figure 5-28: Access Restrictions Tab - Summary

Figure 5-29: Access Restrictions Tab - Internet Access

PCs List

6.

Decide which days and what times you want this policy to be enforced. Select the individual days during

which the policy will be in effect, or select

Everyday

. Then enter a range of hours and minutes during which

the policy will be in effect, or select

24 Hours

.

7.

You can filter access to various applications accessed over the Internet, such as FTP or telnet, by selecting up

to three applications from the drop-down menus under

Applications

.

The Blocked List menu offers a choice of ten preset applications. For the preset applications you select, the

appropriate range of ports will automatically be displayed. Click the

>>

button to add to the Blocked Services

list.

If the application you want to block is not listed or you want to edit an application’s settings, then create a

new one by entering an Application Name, Port Range, and Protocol. Then, click

Add

.

8.

You can also block access by URL address by entering it in the

Website Blocking by URL

Address field or by

Keyword by entering it in the

Website Blocking by Keyword

field.

9.

Click the

Save Settings

button to save the policy’s settings. To cancel the policy’s settings, click the

Cancel

Changes

button.

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