Linksys BEFSX41v1.52 Router Manual PDF (Setup & Configuration Guide)

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Select

IP Addr.

from the pull-down menu beside Remote Security

Gateway. This would be the IP Address of your Internet connection as seen

from the Internet. Enter this

IP Address

here.

Select a type of

encryption

and

authentication

for the tunnel your are

establishing.

10. Check

PFS (Perfect Forward Secrecy)

and enter the

Pre-Shared Key

and

Key Lifetime

11. Click the

Apply

button followed by the

Continue

button.

12. Click the

Connect

button.

Your tunnel should now be established.

Figure C-29

Open your web browser, and enter

192.168.1.1

in the Address field. Press

the

Enter

key.

When the User name and Password field appears, skip the user name and

enter the default password

admin

. Press the

Enter

key.

From the Setup tab,

shown in Figure C-

28, click the

VPN

tab.

From the VPN tab, shown in Figure C-29, select

Enable

beside This

Tunnel.

Enter a

Tunnel Name

. This name should be unique for this particular tun-

nel.

Select

Subnet

from the pull-down menu beside Local Secure Group. Then,

enter the

IP Address

for this group. This would be the IP Address of the

local endpoint, your endpoint.

Select

IP Addr.

from the pull-down menu beside Remote Secure Group.

Then, enter the

IP Address

for this group. This would be the IP Address of

the remote endpoint, the endpoint on the other side of the tunnel.

Figure C-28

Step Five: Create a Tunnel Through the Web-based Utility

Note:

Further details on this step can be found in the VPN Tab section

in “Chapter 7: The Cable/DSL Firewall Router’s Web-based Utility”.

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Appendix D: SNMP Functions

SNMP (

imple

etwork

anagement

rotocol) is a widely-used network

monitoring and control protocol. Data is passed from a SNMP agent, such as

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

Endpoint to the workstation console used to oversee the network. The Router

then returns information contained in a MIB (Management Information Base),

which is a data structure that defines what is obtainable from the device and

what can be controlled (turned off, on, etc.).

SNMP functions, such as statistics, configuration, and device information, are

not available without third-party Management Software. The EtherFast

Cable/DSL Firewall Router with 4-Port Switch/VPN Endpoint is compatible

with all HP Openview compliant software.

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Appendix E: How to Ping Your ISP’s

E-mail & Web Addresses

Virtually all Internet addresses are configured with words or characters (e.g.,

www.linksys.com

www.yahoo.com

, etc.) In actuality, however, these Internet

addresses are assigned to IP addresses, which are the true addresses on the

Internet. For example,

www.linksys.com

is actually 216.23.162.142. Type it into

your web browser and you will wind up at the Linksys home page every time.

There are servers that translate the URL to an IP address; this is called Domain

Name System (DNS).

IP and web addresses, however, can sometimes be long and hard to remember.

Because of this, certain ISPs will shorten their server addresses to single words

or codes on their users’ web browser or e-mail configurations. If your ISP’s e-

mail and web server addresses are configured with single words (

www

e-mail

home

pop3

, etc.) rather than whole Internet addresses or IP addresses, the

Router may have problems sending or receiving mail and accessing the

Internet. This happens because the Router has not been configured by your ISP

to accept their abbreviated server addresses.

The solution is to determine the true web addresses behind your ISPs code

words. You can determine the IP and web addresses of your ISP’s servers by

“pinging” them.

Important

: If you don’t have your ISP’s web and e-mail IP

addresses, you

must

either get them from your ISP or follow these

steps

prior

to connecting your Router to your network.

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Step Two: Pinging for a Web Address

While the IP address returned above would work as your e-mail server address,

it may not be permanent. IP addresses change all the time. Web addresses, how-

ever, usually don’t. Because of this, you’re likely to have fewer problems by

configuring your system with web addresses rather than IP addresses. Follow

the instructions below to find the web address assigned to the IP address you

just pinged.

At the DOS command prompt

, type

ping -a 24.53.32.4

, where 24.53.32.4

is the IP address you just pinged. Information such as the following data

will be displayed.

C:\>ping -a 24.53.32.4

Pinging mail.msnv3.occa.home.com [24.53.32.4] with

32 bytes of data:

Reply from 24.53.32.4: bytes=32 time<10ms TTL=127

Ping statistics for 24.53.32.4:

Packets: Sent = 4, Received = 4, Lost = 0 (0%

loss),

Approximate round trip times in milli-seconds:

Minimum = 0ms, Maximum =

0ms, Average =

0ms

Write down the web address returned by the ping command

(In the

example in Figure C-2:

mail.msnv3.occa.home.com

is the web address).

This web address is the web address assigned to the IP address you just

pinged. While the IP address of

mail

could conceivably change, it is likely

that this web address will not.

Replace your ISP’s abbreviated server address

with this extended web

address in the corresponding Internet application (web browser, e-mail

application, etc.).

Once you have replaced the brief server address with the true server address,

the Router should have no problem accessing the Internet through that Internet

application.

Figure E-2

Step One: Pinging an IP Address

The first step to determining your ISP’s web and e-mail server address is to

ping its IP address.

Power on the computer and the cable or DSL modem

, and restore the

network configuration set by your ISP if you have since changed it.

Click Start

, then

Run,

and type

command

. This will bring up the DOS

window.

At the DOS command prompt

, type

ping mail

(assuming that the loca-

tion for which you’re trying to find an IP address is configured as

mail

Press

Enter

. Information such as the following data, taken from a ping of

Microsoft Network’s e-mail server, will be displayed.

C:\>ping mail

Pinging mail [24.53.32.4] with 32 bytes of data:

Reply from 24.53.32.4: bytes=32 time<10ms TTL=128

Ping statistics for 24.53.32.4:

Packets: Sent = 4, Received = 4, Lost = 0 (0%

loss),

Approximate round trip times in milli-seconds:

Minimum = 0ms, Maximum =

0ms, Average =

0ms

Write down the IP address returned by the ping command

. (In the

example above: 24.53.32.4.) This IP address is the actual IP address of the

server

mail

, or any other word or value you have pinged.

Figure E-1

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EtherFast

Cable/DSL Firewall Router with 4-Port Switch/VPN Endpoint

6. Find and double-click

TCP/IP

in the list to the right (see Figure F-2).

After a few seconds, the main Network window will appear.

The TCP/IP

Protocol should now be listed.

8. Click the

button. Windows may ask for original Windows installation

files. Supply them as needed, e.g., c:\windows\options\cabs, D:\win98,

D:\win95, D:\win9x.

Windows will ask you to restart the PC. Click the

Yes

button.

The TCP/IP installation is now complete.

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Appendix F: Installing the TCP/IP

Protocol

Follow these instructions to install the TCP/IP protocol on one of your PCs

only

after a network card has been successfully installed inside the PC. These

instructions are for Windows 95, Windows 98, and Windows Me. For TCP/IP

setup under Windows NT, 2000, and XP, see your Windows documentation or

the Help feature.

1. Click the

Start

button. Choose

Settings

and then

Control Panel

2. Double-click on the

Network

icon to bring up your Network window.

Select the

Configuration

tab.

3. Click the

Add

button

4. Double-click on

Protocol

5. Highlight

Microsoft

under the list of manufacturers.

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Figure F-2

Figure F-3

Figure F-1

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EtherFast

Cable/DSL Firewall Router with 4-Port Switch/VPN Endpoint

Write down the Adapter Address as shown on your computer screen (see

Figure G-3).

This is the MAC address for your Ethernet adapter and will

be shown as a series of numbers and letters.

The MAC address/Adapter Address is what you will use for MAC Address

Cloning.

The example in Figure G-3 shows the IP address of your Ethernet adapter

as 192.168.1.100. Your computer may show something different.

For Windows NT, 2000, and XP:

The following steps show an alternative way of obtaining the MAC address and

IP address for your Ethernet adapter.

1. Click on

Start

and

Run

. In the Open field, enter

cmd

. Press the

Enter

key

or click the

button.

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Appendix G: Finding the MAC

Address and IP Address for Your

Ethernet Adapter

This section describes how to find the MAC address for your Ethernet adapter

to do MAC Address Cloning for the Router and ISP.

You can also find the IP

address of your computer’s Ethernet adapter.

The IP address is used for filter-

ing, forwarding, and DMZ.

Follow the steps in this appendix to find the MAC

address or IP address for your adapter in Windows 95, 98, Me, NT, 2000, and

XP.

For Windows 95, 98, and Me:

1. Click on

Start

and

Run

. In the Open field, enter

winipcfg

. Then press the

Enter

key or the

button.

2. When the IP Configuration window appears, select the Ethernet adapter

you are using to connect to the Router via a CAT 5 Ethernet cable.

122

Figure G-3

Figure G-4

Note

: The MAC address is also called the Adapter

Address.

Figure G-1

Figure G-2

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