What is a PPTP VPN and How Does It Work?
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Point to Point Tunneling Protocol (PPTP) is one of the oldest used VPN protocols developed by Microsoft. It is the fastest of all VPN protocols, making it ideal for applications where speed is important such as streaming and online gaming. However, PPTP is not as secure because of its weak encryption.
Commonly used for remote access over the Internet, PPTP uses the TCP port 1723 for communication which in turn uses the GRE protocol. The data packets transmitted through the tunnel are encapsulated and treated as IP packets. When initiated from the client side, PPTP tunneling doesn’t need supporting devices like routers, etc.
PPTP is not only very easy to set up but also compatible with most desktop and mobile operating systems. The protocol is recommended in cases where speed is more important than security, because it has many well-known vulnerabilities.
The PPTP protocol uses the GRE and TCP port 1723 for smooth data transmission.
128 bit encryption is the maximum supported using RSA RC4 algorithm.
Due to fairly low level encryption which is 128-bit, the protocol offers highest speed as compared to other protocols.