Using PPTP, RRAS, and Proxy Server 2.0

The information in this article applies to:

• Microsoft Proxy Server, version 2.0
• Routing and Remote Access Service (RRAS), version 1.0

SUMMARY

This article describes the use of Point to Point Tunneling Protocol (PPTP) with Proxy Server 2.0.

MORE INFORMATION

The Routing and Remote Access Server (RRAS) add on for Microsoft Windows NT can be used to create virtual private networks (VPNs) across the Internet. VPNs use the PPTP protocol for secure encrypted communication across the Internet.

Proxy Server 2.0 provides safe and efficient user access from the Intranet to the Internet. Proxy Server 2.0 also has a packet filtering feature that allows it to be configured as a firewall. Other features include content caching, SOCKS 4.3 support, and Winsock Proxy support.

Proxy Server 2.0 and RRAS can co-exist on the same server without loss of functionality to either product.

• RRAS PPTP Server will co-exist with Proxy Server 2.0 and receive PPTP connections from the Internet. If Proxy Server packet filtering is enabled, the predefined filter PPTP RECEIVE must be enabled.

  Please see the Proxy Server 2.0 Readme.txt file for information on the RRAS hotfix that is also required. Or connect to the following location for more information:

        http://www.microsoft.com/proxy/fix/rras_0.htm
  

• Windows NT PPTP Client can be installed on Proxy Server 2.0. The PPTP client will be able to make calls to the Internet because it is making a direct connection to the Internet and not using any of the Proxy services.

  If Proxy Server packet filtering is enabled, the predefined filter PPTP CALL must be enabled.

• A PPTP client located behind Microsoft Proxy Server will not be able to call a PPTP server located on the Internet by passing through the proxy server. The Winsock Proxy client included with Microsoft Proxy Server versions 1.0 and 2.0 does not have the capability to "remote" PPTP calls. PPTP calls can only originate from or be received on the proxy server computer.