Linksys RT31P2 Router Manual PDF (Setup & Configuration Guide)

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Broadband Router with 2 Phone Ports

23

Chapter 5: Configuring the Router

The Setup Tab - MAC Address Clone

A MAC address is a 12-digit code assigned to a unique piece of hardware for identification, like a social

security number. Some ISPs will require you to register a MAC address in order to access the Internet. If you do

not wish to re-register the MAC address with your ISP, you may assign the MAC address you have currently

registered with your ISP to the Router with the MAC Address Clone feature.

MAC Clone

MAC Clone Service

. To use MAC address cloning, select

Enable

.

MAC Address

. Enter the MAC Address registered with your ISP. Then click the

Save Settings

button.

Clone

. If you want to clone the MAC address of the PC you are currently using to configure the Router, then click

the

Clone

button. The Router will automatically detect your PC’s MAC address, so you do NOT have to call your

ISP to change the registered MAC address to the Router’s MAC address. It is recommended that the PC

registered with the ISP is used to open the

MAC Address Clone

screen.

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. Help information is shown on the right-hand side of a

screen. For additional information, click

More

.

Figure 5-11: Setup Tab -

MAC Address Clone

mac address

: the unique address that a

manufacturer assigns to each networking

device.

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Chapter 5: Configuring the Router

The Setup Tab - Advanced Routing

The

Advanced Routing

screen allows you to configure the Network Address Translation (NAT), dynamic routing,

and static routing settings.

Advanced Routing

NAT

. NAT is a security feature that is enabled by default. It enables the Router to translate IP addresses of your

local area network to a different IP address for the Internet. To disable NAT, click the

Disable

radio button.

(When NAT is disabled, the DHCP server feature is also disabled.)

Dynamic Routing

. This feature enables the Router to automatically adjust to physical changes in the network’s

layout and exchange routing tables with the other router(s). The Router determines the network packets’ route

based on the fewest number of hops between the source and the destination.

Transmit RIP Version

. To use dynamic routing for transmission of network data, select the protocol you want:

RIP1

,

RIP1-Compatible

, or

RIP2

.

Receive RIP Version

. To use dynamic routing for reception of network data, select the protocol you want,

RIP1

or

RIP2

.

Static Routing

. Use this feature to set up a static router between the Router and another network. (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, alter the following settings:

Select Entry

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

static route entries.

Enter Route Name

. Enter a name for the static route, using a maximum of 25 alphanumeric characters.

Figure 5-12: Setup Tab -

Advanced Routing

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Chapter 5: Configuring the Router

The Setup Tab - Advanced Routing

Destination LAN IP

. The Destination LAN 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.

Subnet Mask

. The Subnet Mask determines which portion of a Destination IP address is the network

portion, and which portion is the host portion.

Gateway

. This is the IP address of the gateway device that allows for contact between the Router 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 device on the network, such as PCs, print servers, routers, etc.

Interface

. Select

Local

or

Internet

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

Delete Entry

. If you need to delete a route, select its number from the drop-down menu, and click the

Delete

Entry

button.

Show Routing Table

. Click the

Show Routing Table

button to open a screen displaying how data is routed

through your local network. For each route, the Destination LAN IP address, Subnet Mask, Default Gateway, Hop

Count, and Interface are displayed. Click the

Refresh

button to update the information.

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. Help information is shown on the right-hand side of a

screen. For additional information, click

More

.

Figure 5-13: Routing Table Entry List

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Chapter 5: Configuring the Router

The Security Tab - Filter

When you click the Security tab, you will see the

Filter

screen. Filters block specific internal users from

accessing the Internet and block anonymous Internet requests and/or multicasting.

Filter IP Address Range

You can create up to five different IP Address Range filters. To set up a filter using IP addresses, enter the range

of IP addresses you wish to filter in the

Start

and

End

fields. Users who have filtered IP addresses will not be

able to access the Internet at all. If you only want to filter one IP address instead of a range of IP addresses,

enter the same value into both fields. For instance, if you wish to filter the PC with the IP address of

192.168.15.5, enter

5

into both fields on one line: 192.168.15.

5

~ 192.168.15.

5

.

Filter Port Range

You can create up to five different Port Range filters. To filter users by network port number, select the protocol

you want to filter,

TCP

,

UDP

, or

Both

, from the

Protocol

drop-down menu. Enter the port numbers you want to

filter in the

Start

and

End

fields. Users connected to the Router will no longer be able to access any port number

listed there.

Filter MAC Address

This feature blocks computers with specific MAC addresses from going out to the Internet. For information on

obtaining a MAC address, go to “Appendix B: Finding the MAC Address and IP Address for Your Ethernet Adapter.”

To set the MAC filter, click the

Edit MAC Filter Setting

button.

Figure 5-14: Security Tab - Filter

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Chapter 5: Configuring the Router

The Security Tab - Filter

Edit MAC Filter Setting

. Click the

Edit MAC Filter Setting

button. Select the range of MAC address entries in

the drop-down box. In each

mac

field, enter the MAC address you want to filter.

Click the

Apply

button before

closing the window. To cancel changes, click the

Undo

button.

Block WAN Requests

Use these features to enhance your network’s security and filter multicasting.

Block Anonymous Internet Requests

. This keeps your network from being “pinged” or detected and

reinforces your network security by hiding your network ports, so it is more difficult for intruders to work their

way into your network. Select

Enabled

to block anonymous Internet requests, or

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.

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. Help information is shown on the right-hand side of a

screen. For additional information, click

More

.

Figure 5-15: Filtered MAC Address

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