Commonly used ports of proxy server are:

HTTP proxy: 80/8080/3128/8081/9080 socks proxy: 1080.

1.HTTP proxy: it can proxy HTTP access of clients, mainly proxy browser to access web pages.

5.SOCKS agent: SOCKS agent is different from other types of agents. It simply transmits data packets, regardless of the application protocol, whether it is an HTTP request or not, so the SOCKS proxy server is much faster than other types of proxy servers. SOCKS agents are divided into SOCKS4 and SOCKS5. The difference between them is that SOCKS4 agent only supports TCP protocol (transmission control protocol), while SOCKS5 agent supports both TCP protocol and UDP protocol (user datagram protocol), and also supports various authentication mechanisms and server-side domain name resolution. What SOCK4 can do, SOCKS5 can get it, SOCKS5 can't. For example, QQ, our common chat tool, needs SOCKS5 proxy when using proxy, because it needs to use UDP protocol to transmit data.