Configuring Users for Dial-up Access

76 Figure 5-4. Configuring a user for remote access 4. Click OK to exit both the Dialin Information and User Properties dialog boxes.

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

To dial into an ISP that supports PPTP using a Windows NT client, you simply configure dial-up networking as you normally would—with the addition of setting authentication and encryption options. In this section, well focus on setting up an NT client to use the PPTP protocol when youre connecting to a provider that doesnt support it. Below weve listed the steps for setting up a PPTP connection. Well assume that youve already configured Dial-Up Networking to call your ISP and set up a PPP connection. 1. Set up the PPTP protocol the same way you set it up for the RAS server in items 1 through 6 in Section 5.1.1 . 2. RAS configuration is also similar to the way it was done in Section 5.1.2 . This time, for item 3, click the Configure button in the Remote Access Setup dialog box. From there, select the Dial Out box, since we want to be able to dial out from the client rather than dial in. 3. From the start menu under Programs Accessories, select Dial-Up Networking. When the Dial-Up Networking dialog box appears, click the New button and enter the name you want to call your VPN connection on the Phonebook Entry dialog box. For our scenario, well use Central Office VPN. In the Phone Number field, enter the IP address of the PPTP RAS server to which youre connecting. For our example, its 2.1.1.60. In the Dial Using field, select one of the VPN ports you created while installing PPTP and RAS. They will have the name RASPPTPPM VPNn, where n is the number of the port. See Figure 5-5 . 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