In this article we will discuss PPTP, will make brief discussion on PPTP, last article we discuss about DCCP.

PPTP is a networking standard for connecting to virtual private networks, or VPNs. VPNs are secure networks that can be accessed over the Internet, allowing users to access a network from a remote location.

The Point-to-Point Tunneling Protocol is an obsolete method for implementing virtual private networks. PPTP has many well known security issues. PPTP uses a TCP control channel and a Generic Routing Encapsulation tunnel to encapsulate PPP packets. Many modern VPNs use various forms of UDP for this same functionality.

PPTP, operating on TCP port 1723, is one of the oldest VPN protocols still in use, having been around since Windows 95 and standard on all versions of Windows since.

PPTP was designed to allow users to connect to a RAS server from any point on the Internet and still have the same authentication, encryption, and corporate LAN access they’d have from dialing directly into it.

PPTP supports two types of tunneling: Voluntary tunneling: Initiated by the PPTPclient (such as Microsoft Windows 95, Windows 98, Windows NT, or Windows 2000). This type of tunneling does not require support from an Internet service provider (ISP) or network devices such as bridges.


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