Configuring a NAT server in Win 2003

Overview

This article describes how to configure a Network Address Translation (NAT) server by using Windows Server 2003. Windows Server 2003 "Routing and Remote Access" services include NAT routing protocols. If the NAT routing protocol is installed and configured on a server running "Route and Remote Access", an internal network client using a private Internet Protocol (IP) address can access the Internet through the external interface of the NAT server.

How to configure routing and remote access to NAT server

When an internal network client sends a request to connect to the Internet, the NAT protocol driver intercepts the request and forwards it to the target Internet server. . All requests look like external IP addresses from the NAT server. This hides your internal IP address configuration.

Configure “Routing and Remote Access NAT Server:

In the Administrative Tools menu, check “Route and Remote Access”.

In "Routing and Remote Access" MMC, expand your server name (where server name is the name of the server you want to configure, then expand IP routing in the left pane.

Check General and select New Routing Protocol.

Click the NAT/Basic Firewall checkbox to select it, then click OK.

Right-click NAT/in the left pane Basic firewall, then click New Interface.

Click the interface that represents the internal network interface, and then click OK.

In the "Network Address Translation" property, click “ Connect the dedicated interface to the private network ” and click OK.

Right-click NAT/Basic Firewall in the left pane and click New Interface.

Click to indicate the external network interface The interface, then click OK.
In the "Network Address Translation" property, click "Common Interface to Connect to the Internet>.

Click “ Enable NAT” checkbox on this interface, Select it and click OK.

The NAT server can automatically assign IP addresses to internal network clients. If you do not have a DHCP server that has assigned address information to clients on the internal network, you may need to use this feature.

How to configure routing And remote access to the NAT server to assign IP addresses and perform proxy DNS queries. The NAT server can also perform Domain Name System (DNS) queries on behalf of NAT clients. "Routing and Remote Access" NAT servers for Internet hosts included in client requests The name is parsed and the IP address is forwarded to the client.

To configure the "Routing and Remote Access" NAT server to assign an IP address and perform proxy DNS queries on behalf of the internal network client, press The following steps:

Right-click NAT/Basic Firewall in the left pane, then click Properties.

Click the Address Assignment tab, and then click “Automatically assign using DHCP Check the IP address & rdquo; check box.

In the IP address box, type the network ID.

In the Mask box, type the subnet Mask.

Select the Name Resolution tab and click the “Use Domain Name System (DNS) Client” checkbox to select it.

If you use demand dialing To connect to the Internet, click the "Connect to the public network when the name needs to be resolved" checkbox to select it.

In the Demand Dial Interface box, check the interface you want to dial.

Select an app and click OK.

Note: After completing these basic configuration steps, the internal network client can access the servers on the Internet.

How to configure a Windows Server 2003-based computer to use a NAT server

Click Start, point to Control Panel, point to Network Connections, and then click Local Area Connection.

Click Properties.

Click Internet Protocol (TCP/IP).

Click Properties.

In the "Default Gateway" box, type the internal IP address of the NAT server.

Note: If the computer receives its IP address from the "Dynamic Host Configuration Protocol" (DHCP) server, click Advanced, click the IP Settings tab, click Add under Gateway, type NAT The internal IP address of the server, click Add, click OK, and proceed to step 6.

Click OK, click OK, and then click Close.