PPTP full form

What is the full form of PPTP?

The full form of PPTP is Point-to-Point Tunnelling Protocol. PPTP is a networking protocol used to create connections to virtual private networks (VPNs). Users are able to join a network from a distance using these secure networks, which can be accessed online. For those who need to connect to another network from one area to another, this is helpful.

The connection created by PPTP is referred to as being "point-to-point." It enables remote access over the Internet between two specified points. The term "tunnelling" describes how one protocol or algorithm is contained within another one of its kind. The TCP/IP protocol, which manages the Internet connection, encases the point-to-point protocol in PPTP. Therefore, PPTP establishes a direct link between the two clients or sites, providing a protected connection even though the connection is established across the Internet. Due to its minimal level of encryption and ability to provide quick communication, PPTP is quick.

Tunneling Types

• Voluntary Tunneling: Tunneling that is voluntary is started by the client; an ISP or bridge are not needed in this case.

• Compulsory Tunneling: Because the PPTP server initiates this form of tunnelling, router and network access server support is required.

Benefits of PPTP

• For VPNs, the PPTP protocol is reasonably fast.

• It is simple for a client to create PPTP connections across a variety of platforms thanks to its high level of cross-platform compatibility.

• On the majority of devices and OS, it is fairly achievable for a user to set up and setup PPTP (operating systems).

• The cost of transmission is extremely less. Other than the Internet, no other service is needed.

• PPTP lowers hardware expenses. Modems and ISDN cards can be kept separate from other servers by the client. They can buy and handle fewer gadgets as a result.

• The administrative burden is minimal. Instead of maintaining several hardware configurations, administrators just need to manage the RAS (remote access server) and user accounts.

• More security is provided. Over the Internet, every PPTP connection is protected and encrypted. Furthermore, they are compatible with other networking protocols such as Internet Protocol (IP), NetBIOS Extended User Interface (NetBEUI), and Network Packet Exchange (IPE).

The Drawbacks of PTTP

• For safeguarding internet data and traffic, PPTP encryption is insufficient and unsuitable. In fact, NSA has decoded PPTP traffic.

• Cybercriminals are able to use a PPTP connection for malicious assaults.

• Due to the fact that PPTP does not naturally support NAT, a router with PPTP Passthrough is typically needed.

• Firewalls can easily prevent a PPTP connection.

Description

Through the connection with the peer on TCP port 1723, a PPTP tunnel is created. Then, a GRE tunnel to the same peer is started and managed using this TCP connection. The GRE header's routing field has been replaced with a new acknowledgement number field in the non-standard PPTP GRE packet structure. These modified GRE packets are directly encapsulated into IP packets and are recognised as IP protocol number 47, just like in a regular GRE connection. The GRE tunnel is used to transport PPP packets that have been encapsulated, enabling the tunnelling of all PPP-compatible protocols, including IP, NetBEUI, and IPX.

PAP, CHAP, and MS-CHAP v1/v2 can all be used to authenticate routed PPP communication in the Microsoft implementation.

Maintenance of A PPTP

• The PPP (Point-to-Point Protocol) was modified into PPTP based on the encryption and authentication foundation.

• This protocol also protects data, much like previous tunnelling systems. As a result, it establishes a path for data to move via an IP network.

• This protocol operates at Layer 2 of the OSI model and has a client-server architecture.

• Once the VPN connection is formed, PPTP offers two different forms of information flow. Control messages are one of them. It controls and ultimately destroys the VPN connection.

• These control messages are immediately transmitted between the VPN client and server via PPTP.

• Data packets going to or coming from the VPN client through the tunnel make up the other sort of information flow.

• General Routing Encapsulation, IP port 47, and TCP port 1723 are all used by this protocol.

• Up to 128-bit encryption keys are supported by PPTP. Microsoft Point-to-Point Encryption is utilised in this example of encryption.

Security

Use only the following PPTP versions for security reasons:

• RC4 encryption with a 128 bit key is used in MPPE-128 encryption.

• SHA-1 is used for authentication by MS-CHAPv2.

• safe passwords.

History

The RFC 2637[1] standard for PPTP was created by a vendor consortium that included Microsoft, Ascend Communications (now a part of Nokia), 3Com, and others. It was published in July 1999.

The Internet Engineering Task Force has neither recommended nor approved PPTP as a standard.