The types of virtual private networks (VPNs) and their protocols

December 30, 2022

The Virtual Private Network (VPN) allows users to connect to private networks securely and privately over the Internet. All Internet traffic and communications pass through this secure tunnel, which is created by, which creates an encrypted connection.

VPN Remote Access: A VPN that allows remote access to a private network’s services and resources like allows users to connect remotely to that network. Through the Internet, the user connects to the private network securely and privately. Remote Access VPN is useful for both home and business users. When an employee is away from the company’s headquarters, he/she uses a VPN to access the company’s private network and files while he/she is out of the office. VPN services are mainly used by private users to access blocked websites and bypass regional restrictions on the Internet. VPN services are also used by Internet security-conscious users to enhance their security and privacy on the Internet.

VPN site-to-site: Large companies typically use Site-to-Site VPNs, also known as Router-to-Router VPNs. It is possible to connect a network at one office location to a network at another office location using a Site-to-Site VPN for companies or organizations with branch offices in different locations. A VPN that is based on a company’s intranet is called an intranet-based VPN. Site-to-site VPN is also called Extranet based VPN when companies connect to the offices of other companies through their intranets.

A Site-to-Site VPN connects geographically distant networks using the Internet and maintains secure, private, secure communication between them through an imaginary bridge. Because it is based on Router-to-Router communication, one router serves as a VPN client and another as a VPN server in Site-to-Site VPN. The communication can only begin after the authentication has been validated.

  1. Internet Protocol Security – The Internet Protocol Security protocol, also known as IPSec, is used to protect Internet communications over IP networks. IPSec validates sessions and encrypts packets throughout the process.
  2. Layer 2 Tunneling Protocol – Layer 2 Tunneling Protocol (L2TP) is a tunneling protocol that is commonly used in conjunction with other VPN security protocols like IPSec in order to ensure the safety of VPN connections. IPSec protocol encrypts the data and maintains secure communication between two L2TP connection points. L2TP generates a tunnel between two L2TP connection points.
  3. Point–to–Point Tunneling Protocol – A VPN protocol like Point-to-Point Tunneling Protocol is used to encrypt data between two connections. The protocol generates a tunnel and confines data packets. The Point-to-Point Protocol (PPP) encrypts data between two connections.
  4. OpenVPN: The TLS and SSL protocols are used in OpenVPN to create Point-to-Point and Site-to-Site VPN connections.