Linksys BEFVP41v2 Router Manual PDF (Setup & Configuration Guide)

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To restore the Router’s configuration file:

1. Go to the

Help

screen. Click the

Backup & Restore Configuration

link.

2. Click the

Browse

button (from the screen shown in Figure 6-29) to find and

select the configuration file that you want to restore.

3. Click the

Restore

button, and follow the instructions.

EtherFast

Cable/DSL VPN Router with 4-Port 10/100 Switch

Figure 6-29

To upgrade the Router’s firmware:

1. Download the latest firmware version from the Linksys website

(

www.linksys.com

2. Go to the Help screen.

3. Click

Upgrade Firmware

. The page shown in Figure 6-28 will appear.

5. Click the

Browse

button to find the firmware upgrade file that you down-

loaded from the Linksys website.

6. Double-click the

firmware file

you downloaded. Click the

Upgrade

but-

ton, and follow the instructions there.

To back up the Router’s configuration file:

1. Go to the Help screen.

2. Click the

Backup

button and follow the instructions there.

Figure 6-28

Note:

Currently, the Backup & Restore Configuration feature supports

only Internet Explorer 5.0 or higher.

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EtherFast

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Setting Up Filters

•

To set up a filter using IP addresses, enter the range of IP addresses you

wish to filter into the IP address fields. Users who have filtered IP address-

es 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

192.168.1.5, enter

into both fields on one line:

192.168.1.

Click the

Apply

button and

Continue

button when you’re

done.

•

To filter users by network port number, enter a network port number or a

range of network ports.

Enter the port numbers you want to filter into the

port numbers fields.

Users connected to the Router will no longer be able

to access any port number listed there.

Editing MAC Filter Setting

•

This feature filters the network adapter’s specific MAC address from going

out to the Internet.

•

To check your network adapter’s MAC address, run

winipcfg

ipconfig

the command prompt.

To set the MAC filter, click the

Edit MAC Filter

Setting

button.

When a second window appears, select the range in the

drop-down box, and at the MAC number prompt, enter the 12-digit MAC

address you want to filter.

Click the

Apply

button, followed by the

Continue

button, and then close the window.

SPI (Stateful Packet Inspection)

This feature checks the state of a packet to verify that the destination IP address

matches the source IP of the original request.

To use the firewall, select

Enable

; otherwise, select

Disable

to use the NAT firewall.

Blocking WAN Requests

•

By enabling the

Block WAN Request

feature, you can prevent your network

from being “pinged,” or detected, by other Internet users. The

Block WAN

Request

feature also reinforces your network security by hiding your net-

work ports. Both functions of the

Block WAN Request

feature make it more

difficult for outside users to work their way into your network.

•

Click the

Apply

button and then the

Continue

button to save your changes.

Using Multicast Pass Through

This feature allows for multiple transmissions to specific recipients at the same

time.

Select

Enable

to support the feature, or

Disable

to keep the Router from

multicasting.

IP filters block specific internal users from accessing the Internet and enable

VPN (Virtual Private Network) tunnels. This is handled from the Filters tab,

shown in Figure 6-30. You can set up filters by using IP addresses or network

port numbers (or a range of ports).

Filters

Figure 6-30

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From the Forwarding tab, shown in Figure 6-31, you can set up public services

on your network, such as web servers, ftp servers, or e-mail servers.

When

users send this type of request to your network via the Internet, the Router will

forward those requests to the appropriate PC.

Before using Forwarding, you

must disable the Router's DHCP function from the DHCP tab and assign the

Router a new static LAN IP address, as the IP address may change when using

the DHCP server.

If you need to forward all ports for one PC, see the section on DMZ hosting.

To add a server using Forwarding:

1. Enter the port number or range of ports used by the server. On the same

line, select the protocol

UDP

TCP

, or

Both

, and enter the LAN IP address

of the server that you want the Internet user to access.

Configure as many entries as needed—the Router supports up to ten ranges

of ports.

Click the

Apply

button and

Continue

button when finished.

Forwarding

Figure 6-31

Using IPSec Pass Through

•

This feature lets you use IPSec Pass Through.

To use this feature, select

Enable

next to IPSec Pass Through, and then click the

Apply

button and

Continue

button.

•

To disable IPSec Pass Through, select

Disable

, and then click the

Apply

button and

Continue

button.

Using PPTP Pass Through

•

Point-to-Point Tunneling Protocol is the method used to enable VPN

(Virtual Private Networking) tunnels.

To enable this feature, click on

Enable

next to PPTP Pass Through, and then click

Apply

and

Continue

button.

•

To disable this feature, select

Disable

next to PPTP Pass Through, and then

click the

Apply

button and

Continue

button.

Using Remote Management

•

This feature allows you to manage the Router from a remote location, via

the Internet.

To enable this feature, select

Enable,

and then click the

Apply

button and

Continue

button.

•

To disable Remote Management, select

Disable

, and then click the

Apply

button and

Continue

button. If you wish to use this feature on the browser,

enter

http://<WAN IP Address>:8080

Using Remote Upgrade

This feature allows you to “flash,” or upgrade, the Router’s firmware from a

remote location.

To enable Remote Upgrade, select

Enable

, and then click the

Apply

button and

Continue

button.

Using MTU (Maximum Transmission Unit)

This feature specifies the largest packet size permitted for network transmis-

sion. Select

Enable

and enter the value desired. You should leave this value in

the 1200 to 1500 range.

Most DSL users should use

1492

By default, MTU

is set at

1500

when disabled.

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EtherFast

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With Dynamic Routing (set from the Dynamic Routing screen, shown in Figure

6-33), you can automatically adjust to physical changes in the network’s layout.

The Router, 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 routers on

the network. To set up Dynamic Routing:

1. Choose the correct working mode.

Gateway Mode

should be used if the

Router is hosting your network's connection to the Internet.

Router Mode

should be selected if the Router exists on a network with other routers.

2. Choose the

protocol

by which you transmit

(TX)

data on the network.

3. Choose the

protocol

by which the Router receives

(RX)

network data.

4. Click the

Apply

button and

Continue

button to save your changes.

Dynamic Routing

Figure 6-33

Using Port Triggering

From the Forwarding screen, click the

Port Triggering

button to open the Port

Triggering screen, shown in Figure 6-32. Port triggering allows the Router to

watch outgoing data for specific port numbers.

The IP address of the comput-

er that sends the matching data is remembered by the Router, so that when the

requested data returns through the firewall, the data is pulled back to the prop-

er computer by way of IP address and port mapping rules.

1. Enter the

Application Name

of the trigger.

2. Enter the

Trigger Port Range

used by the application.

Enter the

Incoming Port Range

used by the application.

Click the

Apply

button and

Continue

button to finish.

Figure 6-32

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2. Enter the following data to create a new static route:

Destination LAN IP

The Destination LAN IP is the address of the remote net-

work 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 here. If you are build-

ing a route to an entire network, be sure that the network portion of the IP

address is set to zero. For example, the Router’s standard IP address is

192.168.1.1. Based on this address, the address of the network to which the

Router is connected is 192.168.1, with the last digit (1, in this case) deter-

mining the Router’s place on the network. Therefore you would enter the IP

address 192.168.1.0 if you wanted to route to the Router’s entire network,

rather than just to the Router.

Network Mask

The Network Mask (also known as the Subnet Mask) deter-

mines which portion of an IP address is the network portion, and which por-

tion is the host portion. In the example above, the Network Mask is

255.255.255.0. This determines (by using the values 255) that the first three

numbers of an network IP address identify this particular network, while the

last digit (from 1 to 254) identifies the specific host.

Gateway IP

This IP address should be the IP address of the gateway device

that allows for contact between the Router and the remote network or host.

3. Click the

Apply

button and

Continue

button to save your changes.

If the Router is connected to more than one network, it may be necessary to set

up a static route between them. This can be done from the Static Routing

screen, shown in Figure 6-34. A static route is a pre-determined pathway that

network information must travel to reach a specific host or network.

Click the

Show Routing Table

button to view the current static routing configuration.

To create a static route entry:

1. Select

Static Route Entry

from the drop-down list. The Router supports up

to 20 static route entries.

Static Routing

Figure 6-34

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