Configuring NAT

You can use the Routing and Remote Access management console to configure a number of settings for the NAT.

To access the various configuration options for NAT,

1. Click Start, Administrative Tools, and then click Routing and Remote Access to open the Routing and Remote Access management console.

2. In the left console tree, expand Routing And Remote Access, the Server, and then expand IP Routing.

3. Select NAT/Basic Firewall.

4. Click the Action menu, and then select Properties OR, right-click NAT/Basic Firewall and select Properties from the shortcut menu

5. The Properties dialog box contains four tabs which can be used to configure settings for the NAT service.

The various settings available on the different tabs within the Properties dialog box are:

• NAT /Basic Firewall tab: The configurations which you can perform on the NAT /Basic Firewall tab are:

• Enable NAT/disable NAT.

• Enable a basic firewall to prevent unauthorized users from accessing resources on the private network.

• Configure inbound filters by clicking the Inbound Filters button.

li> Configure outbound filters by clicking the Outbound Filters button.

• Address Pool tab: The configurations which you can perform on the Address Pool tab are:

• Specify the Internet addresses which the NAT server will use. A minimum of one Internet address has to be specified.

• You can configure external address to internal address mappings by clicking the Reservations button.

• Services and Ports tab: The configurations which you can perform on the Services and Ports are:

• Specify services which Internet users are allowed to access.

• Configure the internal client computers which external packets are forwarded to.

• ICMP tab: On this tab, you can enable a number of diagnostic packets types which are necessary for the NAT server to recognize and respond to PING or Traceroute.

How to install the NAT service using the Routing And Remote Access Server Setup Wizard

1. Click Start, Administrative Tools, and then click Routing and Remote Access to open the Routing and Remote Access management console.

2. In the left console pane, select the RRAS server that you want to work with.

3. From the Action menu, click Configure and Enable Routing and Remote Access.

4. The Routing and Remote Access Server Setup Wizard initiates.

5. Click Next on the Routing and Remote Access Server Setup Wizard welcome page.

6. On the Configuration page, select the Network Address Translation (NAT) option, and then click Next.

7. On the NAT Internet Connection page, you have to select the connection method which NAT will use to connect to the Internet:

• Use this public interface to connect to the Internet option.

• Create a new demand-dial interface to the Internet option.

8. If you want to enable NAT security, leave the Enable security on the selected interface by setting up Basic Firewall option selected. The option is enabled by default. Click Next.

9. On the Ready to Apply Selections page, click Next.

10. Click Finish.

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11. Click Yes to start the Routing and Remote Access service.