Windows NT TCP/IP Network Administration

Using Dial-Up Networking (DUN)

Dial-Up Networking (DUN) is the flip side of RAS. The RAS server uses Remote Access Service (a Windows NT service) to handle inbound calls from DUN clients, which may use Microsoft or third-party client software. DUN is a Windows client application that uses the RAS Service to place outbound calls to a remote RAS server, which may be a Windows NT RAS server, a third-party RAS Server, an Internet Service Provider, or a Unix host.

If you have installed and configured Microsoft Routing and RAS on Windows NT Server, DUN is also available on that server. All you need do is configure one or more of your RAS ports to allow outbound calls. If you have not installed RAS or RRAS, you need to do so before using DUN. This section shows you how to install and configure RAS on a Windows NT Workstation computer (remember that RRAS requires Windows NT Server), create and configure phone book entries, and place DUN calls to a remote RAS server. If you have RRAS installed on Windows NT Server, you can use the same procedures described later in this section to create and configure phone book entries and to place DUN calls.

Installing and Configuring DUN

To install DUN, double-click the My Computer icon to display the My Computer folder. Then double-click Dial-Up Networking to display the Dial-Up Networking installation screen. If, as sometimes happens, someone has already installed DUN while you weren’t looking, you’ll instead see a phone book entry (or a prompt to create ...