Point-to-Point Tunneling Protocol


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Point-to-Point Tunneling Protocol

(communications, protocol)
(PPTP) A tunneling protocol for connecting Windows NT clients and servers over Remote Access Services (RAS). PPTP can be used to create a Virtual Private Network between computers running NT. It is an extension of PPP sponsored by Microsoft.

Microsoft Point to Point Encryption may be used with PPTP to provide an encrypted connection but PPTP itself does not use encryption.

Compare: Layer Two Tunneling Protocol.

This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

PPTP

(Point-to-Point Tunneling Protocol) A protocol from Microsoft that is used to create a virtual private network (VPN) over the Internet. Remote users can access their corporate networks via an ISP that supports PPTP.

PPTP encapsulates all network protocols for transport over IP. If IP is the source, IP packets ride as encrypted messages inside PPTP packets running over IP. PPTP is based on the point-to-point protocol (PPP) protocol and the generic routing encapsulation (GRE) protocol. Encryption is performed by Microsoft's Point-to-Point Encryption (MPPE), which is based on RC4. See L2TP and VPN protocols.
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References in periodicals archive ?
Security researchers released two tools at the Defcon security conference that can be used to crack the encryption of any PPTP (Point-to-Point Tunneling Protocol) and WPA2-Enterprise (Wireless Protected Access) sessions that use MS-CHAPv2 for authentication.
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Many companies then tried to scale (or actually replace) IPSec with PPTP (point-to-point tunneling protocol).
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HSP includes a variety of protocol modules, covering the most widely used VPN (Virtual Private Network) protocols -- IPSec (Internet Protocol Security) and PPTP (Point-to-Point Tunneling Protocol).
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Additional features of the WireSpeed R517 modem include Virtual Private Network (VPN) support via Point-To-Point Tunneling Protocol (PPTP) for telecommuters who need to access their corporate network from their homes or satellite offices; True Always On feature that allows users to configure modem to remember the system's security password; and Port Forwarding that allows users to safely play gaming applications over the Internet while their local network remains secure.
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With the use of protocols (communication rules) such as PPTP (Point-To-Point Tunneling Protocol) or IPsec (Internet Protocol Security), you can utilize the public Internet for private communication much like the phone company uses the public lines to allow private conversations between two users.
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The prevailing standard for tunneling is Microsoft's Point-to-Point Tunneling Protocol (PPTP), which is supported within Windows 95/98 and Windows NT.
Virtual Private Networks
Other alternatives include Microsoft's Point-to-Point Tunneling Protocol (PPTP), and L2TP, which combines PPTP with the similar Cisco Systems' Layer 2 Forwarding Protocol.
Carriers expand IP VPN outsourcing options: multiple offerings allow for greater customization. (Netcom Update)
Microsoft's point-to-point tunneling protocol (PPTP) creates tunnels for transporting multiprotocol traffic over the Internet, but its capabilities are more limited than IPSec's.
Enterprises embrace IP VPNs: new products and improved services spur growth. (Netcom Update)
On the security front, IPSec is now mature enough to provide standards-based secure tunnel mechanisms above and beyond the first-generation dialup-centric L2F (layer 2 forwarding)/PPTP (point-to-point tunneling protocol)/L2TP (layer 2 tunneling protocol) approaches.
Advanced IP services: Off the starting block
Three popular tunneling protocols have emerged: Microsoft's point-to-point tunneling protocol (PPTP), the Layer 2 tunneling protocol (L2TP), and the IP security protocol (IPSec) which is backed by the Internet Engineering Task Force (IETF).
Time to reconsider IP VPNs?

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