Multitech RouteFinder RF600VPN User manual

RF760VPN

RF660VPN

RF600VPN

RouteFinder Configured with DNAT and Aliases

Reference Guide

Remote Client-to-LAN Configuration Using DNAT and Aliasing

Multi-Tech Systems, Inc. RF760/660/600VPN DNAT and Aliasing Reference Guide 2

RF760/660/600VPN Reference Guide

RouteFinder Configured with DNAT and Aliases

S000285C

Rev. A 01/07/03 Initial release

Rev. B 01/29/04 Add RF600/760VPN

Rev. C 11/02/04 & 01/25/05 Software 3.20 & 3.21

DNAT and Aliasing through the RouteFinder

This document applies to the RF760VPN, the RF660VPN, and the RF600VPN. All references to RouteFinder apply to

all three RouteFinder builds.

This document gives an example explaining how to use DNAT and Aliasing on the RouteFinder to allow a remote

workstation to create a Telnet connection to a LAN though the RouteFinder. This document is divided down into three

sections. Section one explains how to configure the RouteFinder. Section two explains how to configure the

Windows 2000 Server on the LAN to accept a Telnet connection from a remote client. Section three explains how to

configure the Windows 2000 remote client to generate a Telnet connection to the LAN server.

The RouteFinder software is pre-installed. Initial configuration is required in order for you to run the Web

Management software and begin operation. The browser-based management interface eases RouteFinder

configuration and management. The VPN functionality is based on IPSec and PPTP protocols and uses Triple DES

168-bit encryption to ensure that your information remains private.

Caution: Use a safe Password! Your first name spelled backwards is not a sufficiently safe password; a password

such as xfT35$4 is better.

Remote Client-to-LAN Configuration Using DNAT and Aliasing

Multi-Tech Systems, Inc. RF760/660/600VPN DNAT and Aliasing Reference Guide (S000285C) 3

Section One

RF660VPN is used only as example. All RouteFinders can be used.

Remote Client-to-LAN Configuration Using DNAT and Aliasing

Multi-Tech Systems, Inc. RF760/660/600VPN DNAT and Aliasing Reference Guide (S000285C) 4

Configuring the RouteFinder with DNAT and Aliasing

Use this procedure to configure the RouteFinder with DNAT and Aliasing. This configuration allows a Windows 2000

Remote Client to Telnet through the RouteFinder to several Windows 2000 Systems located on the LAN.

Connect a workstation to the RouteFinder’s LAN port via Ethernet for site A.

1. Set the workstation IP address to 192.168.2.100 subnet.

3. Turn on power to the RouteFinder and wait until you hear 5 beeps.

4. Bring up your web browser on the workstation. At the Web browser’s address line, type the default Gateway

address of https://192.168.2.1 and hit the Enter key. In some environments, one or more Security Alert screen(s)

display.

Note: Make sure your PC’s IP address is in the same network as the router’s IP Address. WINIPCFG and

IPCONFIG are tools for finding a computer’s default gateway and MAC address. In Windows 98/ME you can type

WINIPCFG. In Windows 2000/NT, you can type IPCONFIG.

At the initial Security Alert screen, click Yes and follow any additional on-screen prompts. (This step is eliminated

when you have generated a CA certificate at Administration > Site Certificate)

5. The Login screen is displayed. Type the default User name of admin (all lower-case), tab to the Password

entry and type the default Password admin (all lower-case); click Login. The User and Password entries are

case-sensitive (both must be all lower-case). The password can be up to 12 characters. You will later want to

change the User and Password entries from the default (admin) to something else. (If Windows displays the

AutoComplete screen, for security reasons, you may want to click No to tell the Windows OS to not remember

the Password.)

Remote Client-to-LAN Configuration Using DNAT and Aliasing

Multi-Tech Systems, Inc. RF760/660/600VPN DNAT and Aliasing Reference Guide (S000285C) 5

6. If someone else is already logged in to the RouteFinder, or you were logged in recently, the message below is

displayed.

Click the Yes Button. The Login screen is displayed. Repeat Step 5.

7. The Web Management Home screen is displayed.

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Multi-Tech Systems, Inc. RF760/660/600VPN DNAT and Aliasing Reference Guide (S000285C) 6

8. Click on Wizard Setup.

a) Enter the Administrator Email Address (can be anything). (Example: [email protected])

b) Enter the Host name for the RouteFinder (can be anything). (Example: RF660VPN.site-A.com)

c) LAN IP Address and Subnet Mask are set to the defaults. This should be acceptable for Site A.

d) Enter the WAN IP Address. This is the PUBLIC STATIC IP address. (Example: 204.26.122.103)

e) Change the Gateway IP address; this is the IP address of the router that connects to the Internet. (Example:

204.26.122.1)

f) Place a checkmark in the box for the Packet Filter Rule: LAN-ANY-ANY-ALLOW. This will enable this rule.

g) Specify any changes to the passwords that you feel are necessary.

h) Click Save to save the settings you just entered.

i) The following screen will display to save changes. Click OK.

j. The following screen will display. Saving your settings will take a few minutes. Since you kept the LAN IP

address the same, it is not necessary to change this system to a new IP address.

Remote Client-to-LAN Configuration Using DNAT and Aliasing

Multi-Tech Systems, Inc. RF760/660/600VPN DNAT and Aliasing Reference Guide (S000285C) 7

9. Click on Networks & Services > Network.

a) Define the IP address of the WAN port (eth1) on the RF660VPN.

For example: Name = WANInterface

IP address = 204.26.122.103

Subnet mask = 255.255.255.255

b) Define the IP address of the first IP alias.

For example: Name = WANInterface1

IP address = 204.26.122.104

Subnet mask = 255.255.255.255

c) Define the IP address of the second IP alias.

For example: Name = WANInterface2

IP address = 204.26.122.105

Subnet mask = 255.255.255.255

d) Define the IP address of the Windows 2000 Professional computer that will be accessed on the LAN side of

the RF660VPN.

For example: Name = Win2k_Pro

IP address = 192.168.2.100

Subnet mask = 255.255.255.255

e) Define the IP address of the Windows 2000 Server computer that will be accessed on the LAN side of the

RF660VPN.

For example: Name = Win2k_Server

IP address = 192.168.2.11

Subnet mask = 255.255.255.255

Note: The screen displays networks after they have been entered.

WANInterface1 204.26.122.104 255.255.255.255

WANInterface2 204.26.122.105 255.255.255.255

Win2k_Pro 192.168.2.100 255.255.255.255

Win2k_Server 192.168.2.11 255.255.255.255

Remote Client-to-LAN Configuration Using DNAT and Aliasing

Multi-Tech Systems, Inc. RF760/660/600VPN DNAT and Aliasing Reference Guide (S000285C) 8

10. Click on Network Setup > Interface. Locate IP Aliases by scrolling to the bottom the screen. Select the

hardware interface, enter the IP Address, enter the Net Mask for each IP alias. Click the Add button.

Add aliases

here

Aliases are

then displayed

in this area

a) Create an IP alias for address 204.26.122.104 where the remote clients can Telnet this address to access

the Win2k Pro computer on the LAN. After this information is entered, it displays in the Existing IP Aliases

box.

For example: Hardware Interface = eth1

IP address = 204.26.122.104

Subnet mask = 255.255.255.255

b) Create an IP alias for address 204.26.122.105 where the remote clients can Telnet this address to access

the Win2k Server computer on the LAN. After this information is entered, it displays in the Existing IP

Aliases box.

For example: Hardware Interface = eth1

IP address = 204.26.122.105

Subnet mask = 255.255.255.255

Remote Client-to-LAN Configuration Using DNAT and Aliasing

Multi-Tech Systems, Inc. RF760/660/600VPN DNAT and Aliasing Reference Guide (S000285C) 9

11. Click on Network Setup > DNAT to set up DNAT re-routing to allow Windows 2000 servers on the private LAN

side of the RF660VPN to be accessible, via Telnet, to clients outside the LAN. In Pre DNAT Network & Service,

define the original target of the IP packets that are to be re-routed. In Post DNAT Network & Service, define the

new target to which the packets are forwarded.

a) Create DNAT re-routing where the remote clients can Telnet the LAN’s Win2k Pro computer.

For example: Pre DNAT Network = WANInterface1

Service = TELNET

Post DNAT Network = Win2k_Pro

Destination Service = TELNET

b) Create DNAT re-routing where the remote clients can Telnet the LAN’s Win2k Server computer.

For example: Pre DNAT Network = WANInterface2

Service = TELNET

Post DNAT Network = Win2k_Server

Destination Service = TELNET

After this information is entered, it displays at the bottom of the screen.

1 WANInterface1 TELNET Win2k_Pro TELNET

2 WANInterface2 TELNET Win2k_Pro TELNET

12. Click on Packet Filters > Packet Filter Rules. The rule Lan – Any – Any – ACCEPT should already be created.

a) Add the rule Any – TELNET – Win2k_Pro – ACCEPT. It allows an Internet client the ability to Telnet to a

Windows 2000 Pro computer on the LAN at Site A. This rule is enabled automatically.

b) Add the rule Any – TELNET – Win2k_Server – ACCEPT. It allows an Internet client the ability to Telnet to a

Windows 2000 Server on the LAN at Site A. This rule is enabled automatically.

After these rules are entered, they display at the bottom of the screen.

1 Any TELNET Win2k_Pro ACCEPT

2 Any TELNET Win2k_Server ACCEPT

This completes the configuration of the RouteFinder at Site A.

Next, configure the Windows 2000 Server on the LAN and the remote client to support a Telnet connection.

Remote Client-to-LAN Configuration Using DNAT and Aliasing

Multi-Tech Systems, Inc. RF760/660/600VPN DNAT and Aliasing Reference Guide (S000285C) 10

Section Two

Configuring Windows 2000 Server at LAN site to support Telnet

Note: This procedure is very similar and can apply to configuring a Windows XP system.

1. Click on Start, point to Settings, then click on Control Panel.

2. When the Control Panel screen opens, double click on Administrative Tools.

3. When the Administrative Tools screen opens, double click on Services. The following screen displays:

4. Scroll down and right-click Telnet service and click on Properties.

5. In the Startup type box, click Automatic, then click on Start and click on OK.

6. The Telnet status should now read Started.

7. This server is now ready to receive a remote Telnet connection.

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