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Get connected to a Windows Server 2003 VPN in this step-by-step

Setting Up a Windows Server 2003 Remote Access Server
Setting up a Windows Server 2003-based remote access server is easy. Use the Routing and Remote Access Server Setup Wizard to set up the Remote access (dial-up or VPN) configuration using the following procedure:
1. Click Start, point to Programs, point to Administrative Tools, and then click Routing and Remote Access.
2. Right-click your server name, and then click Configure and Enable Routing and Remote Access. Click Next.
3. In Configuration, click Remote access (dial-up or VPN) and then click Next.
4. In Remote Access, select VPN, Dial-up, or both as needed. Click Next.
5. In VPN Connection, click the connection that corresponds to the interface connected to the Internet or your perimeter network, and then click Next.
6. In IP Address Assignment, click Automatically if the remote access server should use DHCP to obtain IP addresses for remote access clients. Alternately, click From a specified range of addresses to use one or more static ranges of addresses. When IP address assignment is complete, click Next.
7. In Managing Multiple Remote Access Servers, if you are using RADIUS for authentication and authorization, click Yes, set up this server to work with a RADIUS server, and then click Next.
? In RADIUS Server Selection, configure the primary (mandatory) and alternate (optional) RADIUS servers and the shared secret, and then click Next.
8. Click Finish.

Configuring a Windows XP Remote Access Client
You can configure a Windows XP dial-up or VPN remote access client either manually or by using Connection Manager.
Manual Configuration of a Dial-up Remote Access Connection
If you have a small number of dial-up remote access clients, you can manually configure dial-up connections for each client. For Windows XP dial-up clients, use the following instructions to create the dial-up connection:
1. From the Windows XP desktop, click Start, click Control Panel, click Network and Internet Connections, and then click Network Connections.
2. Under Network Tasks, click Create a new connection, and then click Next.
3. Click Connect to the network at my workplace, and then click Next.
4. Click Dial-up connection, and then click Next.
5. Type the name of the dial-up connection, and then click Next.
6. Type the phone number for the modem to dial, and then click Next.
7. Click Anyone's use if you want this dial-up connection to be available to all users who log on to this computer. Otherwise, click My use only. Click Next. You will only see this choice if the computer running Windows XP is a member of a domain.
8. If you want to have a shortcut on the desktop for this dial-up connection, click Add a shortcut to my desktop. Click Finish.
9. In the Connect dialog box, type the user name and password that will be sent as your security credentials when you connect. If you want to save the password so that it does not have to be typed for each connection attempt, click Save this user name and password for the following users.
10. To make a dial-up connection, click Connect.
To create a dial-up connection on a computer running Windows 2000, double-click the Make New Connection icon in the Network and Dial-up Connections folder and select the Dial to private network connection type.
Manual Configuration of a VPN Remote Access Connection
If you have a small number of VPN remote access clients, you can manually configure VPN connections for each client. For Windows XP VPN clients, use the following instructions to create the VPN connection:
1. From the Windows XP desktop, click Start, click Control Panel, click Network and Internet Connections, and then click Network Connections.
2. Under Network Tasks, click Create a new connection, and then click Next.
3. Click Connect to the network at my workplace, and then click Next.
4. Click Virtual Private Network connection, and then click Next.
5. Type the name of the VPN connection, and then click Next.
6. Click Automatically dial this initial connection and select the correct dial-up connection that connects this computer to the Internet. If your computer is already connected to the Internet through a DSL, cable modem, or other type of LAN connection, click Do not dial the initial connection. Click Next.
7. Type either the IP address or the DNS name of the VPN server (for example: vpn.example.microsoft.com), and then click Next.
8. Click Anyone's use if you want this dial-up connection to be available to all users who log on to this computer. Otherwise, click My use only. Click Next. You will only see this choice if the Windows XP computer is a member of a domain.
9. If you want to have a shortcut on the desktop for this dial-up connection, click Add a shortcut to my desktop. Click Finish.
10. In the Connect dialog box, type the user name and password that will be sent as your security credentials when you connect. If you want to save the password so that it does not have to be typed for each connection attempt, click Save this user name and password for the following users.
11. To make a VPN connection, click Connect.
To create a VPN connection on a computer running Windows 2000, double-click the Make New Connection icon in the Network and Dial-up Connections folder and select the Connect to a private network through the Internet connection type.