There are many kinds of VPN protocols used by overpass, commonly used ones include OpenVPN, L2TP/IPSec, PPTP, SSTP, WireGuard, etc. Among them, OpenVPN and L2TP/IPSec are more common, while PPTP has been gradually eliminated due to poor security. Different VPN protocols have different advantages and disadvantages, and which protocol to use depends on the needs and usage of the user.

Many protocols suitable for Chinese users that have emerged in recent years,

V2Ray, Trojan and Xray are currently more commonly used network proxy software, and they can all be used to achieve network encryption, privacy protection and network freedom. Although they are implemented in different ways, they all have similar functions.

V2Ray is an open source network proxy software, which supports multiple protocols and transmission methods, and can realize proxy and forwarding based on various protocols such as Socks, HTTP, Shadowsocks, VMess, etc. V2Ray is characterized by high flexibility, supports advanced functions such as custom routing and load balancing, and has a strong ability to resist blocking.

Trojan is an emerging network proxy software, which uses a multiplexing technology similar to V2Ray, and can communicate by disguising it as HTTPS traffic, making it more difficult to be blocked. Trojan is characterized by easy deployment and support for multiple clients. At the same time, it is more difficult to be blocked and identified due to its characteristic of disguising as HTTPS traffic.

Xray is an upgraded version of V2Ray, which is refactored and optimized based on the core module of V2Ray, providing stronger performance and scalability. Xray is characterized by supporting multiple transmission protocols and routing rules, and also provides a Trojan-like camouflage function, making it more difficult to be blocked and detected.

Therefore, V2Ray, Trojan and Xray can all be used to realize the functions of network proxy, privacy protection and network freedom. Different software has its own characteristics and advantages. Users can choose the network proxy software that suits them according to their needs and usage scenarios .

Regardless of the VPN protocol you use, there is a risk of being blocked. Some countries will adopt technical means to block VPN services, so that users cannot access blocked websites through VPN over the wall. In addition, some websites will also detect and block a large number of IP addresses using VPN services, so that users cannot access these websites through VPN. Therefore, it is very important to choose a reliable VPN service provider and use a suitable VPN protocol. At the same time, we should also pay attention to the usage method of VPN and the strategy of avoiding risks.