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Chapter 5: Configuring the Gateway

The Setup Tab

Wireless-G ADSL Gateway

•

MTU. The MTU (Maximum Transmission Unit) setting specifies the largest packet size permitted for network

transmission. Select

Manual

and enter the value desired. It is recommended that you leave this value in the

1200 to 1500 range. By default, MTU is configured automatically.

Network Setup

•

Router IP. The values for the Gateway’s Local IP Address and Subnet Mask are shown here. In most cases,

keeping the default values will work.

•

Local IP Address. The default value is 192.168.1.1.

•

Subnet Mask. The default value is 255.255.255.0.

•

Network Address Server Settings (DHCP). A Dynamic Host Configuration Protocol (DHCP) server automatically

assigns an IP address to each computer on your network for you. Unless you already have one, it is highly

recommended that you leave the Gateway enabled as a DHCP server.

•

Local DHCP Server. DHCP is already enabled by factory default. If you already have a DHCP server on your

network, set the Gateway’s DHCP option to

Disable

.

•

Starting IP Address. Enter a value for the DHCP server to start with when issuing IP addresses. This value

must be 192.168.1. 2 or greater, because the default IP address for the Gateway is 192.168.1.1.

•

Number of Address. Enter the maximum number of computers that you want the DHCP server to assign IP

addresses to. This number cannot be greater than 253. By default, as shown in Figure 5-9, the range is

192.168.1.100 to 192.168.1.149.

•

DHCP Address Range. The range of DHCP addresses is displayed here.

•

Client Lease Time. Enter the minutes in the field.

•

Time Setting. This is where you set the time zone for your Gateway.

When finished making your changes on this tab, click the

Save Settings

button to save these changes, or click

the

Cancel Changes

button to undo your changes.

Figure 5-9: Optional Settings

20

Chapter 5: Configuring the Gateway

The Setup Tab

Wireless-G ADSL Gateway

The DDNS Tab

The Gateway offers a Dynamic Domain Name System (DDNS) feature. DDNS lets you assign a fixed host and

domain name to a dynamic Internet IP address. It is useful when you are hosting your own website, FTP server, or

other server behind the Gateway.

Before you can use this feature, you need to sign up for DDNS service at DynDNS.org.

DDNS

DDNS Service. If your DDNS service is provided by DynDNS.org, then select

DynDNS.org

in the drop-down menu.

(See Figure 5-10.) To disable DDNS Service, select

Disabled

.

DynDNS.org

•

User Name, Password, and Host Name. Enter the User Name, Password, and Host Name of the account you

set up with DynDNS.org.

•

Internet IP Address. The Gateway’s current Internet IP Address is displayed here. Because it is dynamic, it will

change.

•

Status. The status of the DDNS service connection is displayed here.

When finished making your changes on this tab, click the

Save Settings

button to save these changes, or click

the

Cancel Changes

button to undo your changes.

Figure 5-10: DynDNS.org

21

Chapter 5: Configuring the Gateway

The Setup Tab

Wireless-G ADSL Gateway

Advanced Routing Tab

The Advanced Routing screen allows you to configure the dynamic routing and static routing settings. (See Figure

5-11.)

Advanced Routing

•

Dynamic Routing. With Dynamic Routing you can enable the Gateway to automatically adjust to physical

changes in the network’s layout. The Gateway, using the RIP protocol, determines the network packets’ route

based on the fewest number of hops between the source and the destination. The RIP protocol regularly

broadcasts routing information to other Gateways on the network. To enable RIP, click

Enabled

. To disable

RIP, click

Disabled

.

•

Receive RIP Version. To receive RIP messages, select the protocol you want:

RIP1

or

RIP2

. If you don’t want

to receive RIP messages, select

None

.

•

Transmit RIP Version. To transmit RIP messages, select the protocol you want:

RIP1, RIP1-Compatible, or

RIP2

. If you don’t want to transmit RIP messages, select

None

.

Static Routing

If the Gateway is connected to more than one network, it may be necessary to set up a static route between

them. A static route is a pre-determined pathway that network information must travel to reach a specific host or

network. To create a static route, change the following settings:

•

Select Entry. Select the number of the static route from the drop-down menu. The Gateway supports up to 20

static route entries. If you need to delete a route, after selecting the entry, click the

Delete Entry

button.

•

Destination IP Address. The Destination IP Address is the address of the remote network or host to which you

want to assign a static route. Enter the IP address of the host for which you wish to create a static route. If

you are building a route to an entire network, be sure that the network portion of the IP address is set to 0.

•

Subnet Mask. The Subnet Mask (also known as the Network Mask) determines which portion of an IP address

is the network portion, and which portion is the host portion.

•

Gateway. This IP address should be the IP address of the gateway device that allows for contact between the

Gateway and the remote network or host.

•

Hop Count. This determines the maximum number of steps between network nodes that data packets will

travel. A node is any router in the path to the remote network.

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Chapter 5: Configuring the Gateway

The Setup Tab

Wireless-G ADSL Gateway

•

Interface. Select

LAN

& Wireless

or

Internet

, depending on the location of the static route’s final destination.

•

Show Routing Table. Click the

Show Routing Table

button to open a screen (see Figure 5-12) displaying how

data is routed through your LAN. For each route, the Destination IP address, Subnet Mask, Gateway, and

Interface are displayed. Click the

Refresh

button to update the information.

When finished making your changes on this tab, click the

Save Settings

button to save these changes, or click

the

Cancel Changes

button to undo your changes.

Figure 5-12: Routing Table

23

Chapter 5: Configuring the Gateway

The Wireless Tab

Wireless-G ADSL Gateway

The Wireless Tab

Basic Wireless Settings

(See Figure 5-13.)

This screen allows you to choose your wireless network mode and wireless security.

Wireless Network

•

Wireless Network Mode. If you have 802.11g and 802.11b devices in your network, then keep the default

setting,

Mixed

. If you have only 802.11g devices, select

802.11g

. If you have only 802.11b devices, select

802.11b

. If you want to disable wireless networking, select

Disabled

.

•

Wireless Network Name (SSID). Enter the name for your wireless network into the field. The SSID is the

network name shared among all devices in a wireless network. The SSID must be identical for all devices in

the wireless network. It is case-sensitive and must not exceed 32 alphanumeric characters, which may be

any keyboard character. Linksys recommends that you change the default SSID (linksys) to a unique name of

your choice.

•

Wireless Channel. Select the appropriate channel from the list provided to correspond with your network

settings, between 1 and 13 (most of Europe). All devices in your wireless network must use the same channel

in order to function correctly. Linksys wireless clients will automatically detect the wireless channel of the

Gateway.

Wireless Security

•

Wireless SSID Broadcast. When wireless clients survey the local area for wireless networks to associate with,

they will detect the SSID broadcast by the Gateway. To broadcast the Gateway's SSID, keep the default

setting,

Enabled

. If you do not want to broadcast the Gateway's SSID, then select

Disabled

.

•

WEP Encryption Level. An acronym for Wired Equivalent Privacy, WEP is an encryption method used to protect

your wireless data communications. WEP uses 64-bit or 128-bit keys to provide access control to your

network and encryption security for every data transmission. To decode data transmissions, all devices in a

network must use an identical WEP key. Higher encryption levels offer higher levels of security, but due to the

complexity of the encryption, they may decrease network performance. To enable WEP, select

64 bits (10

hex digits)

(see Figure 5-13) or

128 bits (26 hex digits)

(see Figure 5-14). To disable WEP encryption, keep

the default setting,

No Encryption

.

•

Passphrase for keys. Instead of manually entering WEP keys, you can enter a passphrase. This passphrase is

used to generate one or more WEP keys. It is case-sensitive and should not be longer than 16 alphanumeric

characters. (This Passphrase function is compatible with Linksys wireless products only and cannot be used

Figure 5-14: 128-Bit WEP Encryption

Figure 5-13: 64-Bit WEP Encryption