Installing, Configuring, and Using PPTP with Microsoft Clients and Servers

 

 

 

User Guide

 

Point-to-Point Tunneling Protocol (PPTP) is a network protocol that enables the secure transfer of data from a remote client to a private enterprise server, creating a virtual private network (VPN ) by using TCP/IP-based data networks. PPTP supports multiple network protocols (IP, IPX, and NetBEUI) and can be used for virtual private networking over public and private networks. You can use PPTP to provide secure, on-demand, virtual networks by using dial-up lines, local area networks (LANs), wide area networks (WANs), or the Internet and other public, TCP/IP-based networks.

 

 

 

 

Virtual Private Networking is provided as a standalone upgrade to Windows 95, entitled "Dial-Up Networking 1.2 Upgrade." This section explains how to install and configure Virtual Private Networking and assumes the following:

Updating Winsocket dynamic link library

To update winsock dynamic link library on a client running Windows 95

  1. Insert your installation disk that contain wsockupd.exe and double-click wsockupd.exe. For those with the soft copy just go to Explorer and double click on wsockupd.exe.
  2. Setup asks if you want to update Windows 95 Socket API. Click Yes.
  3. Setup copies several files, and then asks if you want to restart your computer. Click Yes.

    4. Installing PPTP on a Windows 95-based Client

    To install the PPTP protocol on a client running Windows 95
  4. Insert your installation disk and double-click Msdun12.exe. For those with the soft copy just go to Explorer and double click on Msdun12.exe.
  5. Setup asks if you want to install Microsoft Dial-Up Networking. Click Yes.
  6. Setup displays a license agreement. When you have read it, and if you accept its terms, click Yes.
  7. Setup copies several files, and then asks if you want to restart your computer. Click Yes.
  8. Setup restarts your computer. Depending on your configuration, you may need to log on to your computer.
  9. Setup copies more files, including some files from your original Windows 95 installation source. If Setup cannot locate your installation source, it will ask you for your original Windows 95 compact disc or setup disks.

Note

Setup may notify you of a version conflict and ask you if you want to keep your original file. If so, click Yes.
  1. If you are running Setup for the first time, a dialog box appears, explaining that the DHCP client was unable to obtain an IP address and asking if you want to see future DHCP messages. Click No.
  2. Setup restarts your computer. Depending on your configuration, you may need to log on to your computer again. You will then be ready to configure Dial-Up Networking.

Configuring Dial-Up Networking on Windows 95

You can configure two types of connections: a connection to the Internet through ISP and a tunnel connection to the PPTP server on the NTU network.

The following procedures describe how to use Dial-Up Networking to configure SINGNET and PPTP connections.

Creating the Connection to your ISP

Please follow the instructions as given by your ISP.

 

Creating the Connection to a PPTP Server

You must create connection to your PPTP server by using a VPN device.

To create a connection to dial up a PPTP server by using a VPN device

  1. Click Start, point to Programs, point to Accessories, and then click Dial-Up Networking. The Dial-Up Networking window appears.
  2. Click Make New Connection. The Make New Connection wizard appears, as illustrated in the figure on the next page.

Figure 19 – Creating a connection to a PPTP server

  1. Type a connection name, like PPTP Server, in the Type a name for the computer you are dialing box.
  2. Select Microsoft VPN Adapter in the Select a modem box, and then click Next. The following dialog box appears.

Figure 20 – Adding the name of the PPTP server to the connection

  1. In the Host name or IP address box, type vpngate.ntu.edu.sg.
  2. Click Next, and then click Finish. A connection icon is created in the Dial-Up Networking folder, as illustrated in the figure on the next page.

Figure 21 – Example icon for a PPTP server connection

  1. Verify the PPTP server connection by using the following procedure.

Note

Keep in mind that after you connect to a PPTP server on a remote network, your workstation will be connected to that remote network as if you were physically attached to it. Therefore, you must ensure that your workstation and its applications support the protocols native to that network.

To verify or edit the connection to your PPTP server

  1. In My Computer, right-click the PPTP server connection icon in the Dial-Up Networking folder, and then click Properties to verify that your PPTP server connection is correctly configured. The PPTP Server dialog box appears, as illustrated in the following figure.

 

 

Figure 22 – Verifying the basic configuration for a PPTP server connection

  1. Review the information on the General tab to ensure that the host name or IP address is correct and that Microsoft VPN Adapter is selected. Make any necessary changes.
  2. Click the Server Types tab. The Server Types tab is illustrated in the figure on the next page.

Figure 23 – Verifying the network connection for a PPTP server connection

  1. In the Advanced options box, make sure the Log on to network checkbox is checked.

 

  1. In the Allowed network protocols box, select only TCP/IP. Click TCP/IP Settings to display the TCP/IP Settings dialog box. Click Server Assigned IP Address and Server Assigned Name Server Address. Uncheck Use IP header compression and Use default gateway on remote network . The rest of options leave as default.

    2.  

  2. Click OK.

 

Using PPTP to Connect to a PPTP Server by Dialing your ISP

With PPTP, you can connect your workstation to a remote network by tunneling through the Internet to a PPTP server on that network. To do so, you must make two connections. First, you must connect to the Internet through your ISP. Next, you must create a tunnel to the target network. This section explains how to make these connections using Windows 95 -based clients.

Connecting to a PPTP Server Using a Windows 95-based PPTP Client

To connect to the Internet using a Windows 95-based PPTP client

  1. In My Computer, double-click Dial-up Networking.
  2. Double-click the connection icon that was created for your ISP.
  3. In the Connect To dialog box that appears, enter the user name and password required by your ISP, and then click Connect.
  4. The resulting connection is illustrated in the figure on the next page.

Figure 24 – Connecting to the Internet through SINGNET

To connect to the target network using a tunnel to the PPTP server

  1. After connecting to your ISP, click the icon that was created for your PPTP server.
  2. Enter the user name and password required for the target network.
  3. In the Connect To window, click Connect.
  4. You now have two connections, as shown in the following figure.

Figure 25 – Creating a tunnel to the PPTP server