51

Configure

• Advanced

: Clicking on the Advanced link displays the Advanced LAN IP Interface page.

•

IGMP Forwarding

: The default setting is Disabled. If you check this option, it will

enable Internet Group Management Protocol (IGMP) multicast forwarding. IGMP allows

a router to determine which host groups have members on a given network segment.

•

RIP Send Mode

: Specifies whether the gateway should use Routing Information Proto-

col (RIP) broadcasts to advertise its routing tables to other routers on your network. You

may choose from the following protocols:

• RIP-1: Routing Information Protocol version 1

• RIP-2: RIP Version 2 is an extension of the original Routing Information Protocol (RIP-

1) that expands the amount of useful information in the RIP packets. While RIP-1 and

RIP-2 share the same basic algorithms, RIP-2 supports several new features, including

inclusion of subnet masks in RIP packets and implementation of multicasting instead of

broadcasting (which reduces the load on hosts which do not support routing protocols.

• RIP-1 compatibility: Compatible with RIP version 1

• RIP-2 with MD5: MD5 authentication is an extension of RIP-2 that increases security

by requiring an authentication key when routes are advertised.

• RIP MD5 Key: Secret password when using RIP-2 with MD5.

•

RIP Receive Mode:

Specifies whether the Gateway should use Routing Information

Protocol (RIP) broadcasts to update its routing tables with information received from

other routers on your network. The protocol choices are the same as for the RIP send

mode.

•

Proxy ARP:

Specifies whether you want the Gateway to respond when it receives an

address resolution protocol for devices behind it. This is a way to make a computer that

is physically located on one network appear to be part of a different physical network

connected to the same Gateway. It allows you to hide a computer with a public IP

address on a private network behind your Gateway, and still have the computer appear

to be on the public network “in front of” the Gateway.

52

•

Static Client Address Translation:

If you check this checkbox, this feature allows a

statically addressed computer whose IP address falls outside of the LAN subnet(s) to

simply plug in and get online without any manual configuration on either the host or the

Netopia Gateway. If enabled, statically addressed LAN hosts that have an address out-

side of LAN subnets will be able to communicate via the Router’s WAN interface to the

Internet. Supported static IP address values

must

fall

outside

of the Router's LAN sub-

net(s).

• DHCP Server

: Your Gateway can provide network configuration information to computers

on your LAN, using the Dynamic Host Configuration Protocol (DHCP).

If you already have a DHCP server on your

LAN, you should turn this service off.

If you want the Gateway to provide this ser-

vice, click the

pull-down menu,

choose

Server

, then configure the range of IP

addresses that you would like the Gateway to

hand out to your computers.

You can also specify the length of time the computers can use the configuration informa-

tion; DHCP calls this period the lease time.

Your Service Provider may, for certain services, want to provide configuration from its

DHCP servers to the computers on your LANs. In this case, the Gateway will relay the

DHCP requests from your computers to a DHCP server in the Service Provider's network.

Click the relay-agent and enter the IP address of the Service Provider's DHCP server in the

Server Address field. This address is furnished by the Service Provider.

☛

NOTE:

The

Relay-agent

option only works when NAT is off and the Gateway is in

router mode.

53

Configure

Wireless

(supported models)

If your Gateway is a wireless model (such as a 3347W) you can enable or disable the wire-

less LAN (WLAN) by clicking the

link.

Wireless functionality is enabled by default.

If you uncheck the

Enable Wireless

checkbox, the Wireless Options are disabled, and the

Gateway will not provide or broadcast any wireless LAN services.

SSID (Network ID)

: The SSID is preset to a number that is unique to your unit. You can

either leave it as is, or change it by entering a freeform name of up to 32 characters, for

example “Ed’s Wireless LAN”. On client PCs’ software, this might also be called the

Net-

work Name

. The SSID is used to identify this particular wireless LAN. Depending on their

operating system or client wireless card, users must either:

•

select from a list of available wireless LANs that appear in a scanned list on their client

•

or, if you are in Closed System Mode (see

Enable Closed System Mode

below), enter

this name on their clients in order to join this wireless LAN.

The pull-down menu for enabling

Privacy

offers four settings:

WPA-802.1x, WPA-PSK

,

WEP - Automatic

, and

Off - No Privacy. WEP-Manual

is also available on the Advanced

Configuration Options page.

See “

Privacy

” on page

54.

54

☛

NOTE:

On the 2200-Series Gateways,

WEP-Manual

privacy is enabled by default.

Use the Netopia Installation Wizard on the accompanying Netopia CD to gener-

ate WEP keys for connecting wireless client computers.

Privacy

•

Off - No Privacy

provides no encryption on your wireless LAN data.

•

WPA-802.1x

provides RADIUS server authentication support.

•

WPA-PSK

provides Wireless Protected Access, the most secure option for your wire-

less network. This mechanism provides the best data protection and access control.

55

Configure

The

Pre Shared Key

is a passphrase shared between the Router and the clients and is

used to generate dynamically changing keys. The passphrase can be 8-63 characters or

up to 64 hex characters. It is recommended to use at least 20 characters for best secu-

rity.

•

WEP - Automatic

is a passphrase generator. You enter a passphrase that you choose

in the

Passphrase

field. The passphrase can be any string of words or numbers.

You can provide a level of data security by enabling WEP (Wired Equivalent Privacy) for

encryption of network data. You can enable 40-, 128-, or 256-bit WEP Encryption

(depending on the capability of your client wireless card) for IP traffic on your LAN.

You select a single key for encryption of outbound traffic. The WEP-enabled client must

have an identical key of the same length, in the identical slot (1 – 4) as the Gateway, in

order to successfully receive and decrypt the traffic. Similarly, the client also has a

‘default’ key that it uses to encrypt its transmissions. In order for the Gateway to

receive the client’s data, it must likewise have the identical key of the same length, in

the same slot. For simplicity, a Gateway and its clients need only enter, share, and use

the first key.