Configuring PPTP for Dial-up Networking on a Windows NT Client

77 Figure 5-5. Configuring dial-up networking over a PPTP device 4. You can also specify which authentication method to require, and whether or not to require data encryption on the client. From the same Edit Phonebook Entry dialog box, click on the Security tab and you will see the same security choices you had on the server see Figure 5-6 . For the most secure VPN, make the selection to Accept only Microsoft encrypted authentication and check the Require data encryption checkbox. Whether youre dialing into an ISP that supports PPTP or not, youll want to use MS-CHAP and encryption if your client allows it. Figure 5-6. Setting the dial-up networking security options

5.3 Configuring PPTP for Dial-up Networking on a Windows 95 or 98 Client

As weve said, Windows 95 doesnt come with PPTP already installed. To use it, youll have to obtain Dial-Up Networking Update 1.3 from Microsofts web site. Since updates and service packs change from time to time, you should check the Microsoft web site to see what level of software you might need. The installation of the Dial-Up Networking DUN update 78 is very simple. There arent any parameters to enter, and Microsoft includes a useful help document. Because of this, were not going to go over the step-by-step setup instructions for installation. As weve also said, Windows 98 comes with VPN access as a standard part of the OS. To configure PPTP for Windows 95 or 98, you must configure two dial-up networking profiles: one to connect to the ISP and one to connect to the PPTP server. Because many people are familiar with configuring DUN to connect to their ISP, well skip over that step. If youve never done it before, you can find information on how to set up a DUN entry in the document Microsoft included with the DUN update. In order to set up your VPN DUN profile, follow these steps: 1. Go to the Start menu, and select Programs Accessories Dial-Up Networking. 2. When the Dial-Up Networking window appears, click Make New Connection. 3. The Make New Connection wizard will appear. Type in what you want to call the connection profile in the Name of the computer you are dialing entry field. Well call ours Central Office VPN again see Figure 5-7 . In the Select a device pull-down menu, choose the Microsoft VPN Adapter. Figure 5-7. Creating a new VPN profile in the DUN Make New Connection wizard 4. Youll then see a dialog box asking you to type in the host name or IP address of the VPN server to which you wish to connect. For our example, well use 2.1.1.60 see Figure 5-8 .