The global VPN usage is greatly decrypted. Do you use it right?

The US empire that dominates the world will also worry about using the right VPN. It seems that this is a personal problem.

As a "brick home" in network security, I have learned about the use of VPNs around the world because of my professional habits. I don’t know if I investigate. I also made a jump in the investigation. Here are some of my investigations. Share it with everyone.

The function of the virtual private network is to establish a private network on the public network for encrypted communication. Widely used in enterprise networks. The VPN gateway implements remote access by encrypting the data packet and converting the destination address of the data packet. There are many ways to classify VPNs, mainly by classification. VPN can be implemented in various ways such as server, hardware, and software.

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Current technical classification

MPLS: Multiprotocol Label Switching (MPLS) is a system for fast packet switching and routing that provides the ability to target, route, forward, and exchange network traffic. More specifically, it has a mechanism to manage various forms of communication flow. It provides a way to map IP addresses to simple fixed-length tags for different packet forwarding and packet switching techniques.

SSL: The SSL (Secure Sockets Layer) protocol, which specifies a mechanism for providing data security layering between application protocols such as HTTP, Telenet, NMTP, and FTP, and the TCP/IP protocol. It provides data encryption, server authentication, message integrity, and optional client authentication for TCP/IP connections.

IPSec: IPSec is an open standard framework that ensures secure and secure communications over Internet Protocol networks by using encrypted security services.

business background

In the 1990s, computers connected to the Internet through very expensive leased lines or dial-ups. The distance between sites can cost thousands or tens of thousands of dollars.

In order to avoid the connection of multiple dedicated lines to the Internet, VPN came into being. Because VPNs can reduce network expenses, users can safely exchange private data, VPNs become popular, and expensive private lines become redundant.

Due to the restrictions on the overseas network in mainland China, it is more popular in mainland China to connect overseas via free or paid VPN. At the same time, foreign companies want to connect to overseas websites, and they also set up their own VPN or use paid VPN services.