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This article mainly introduces the types of foreign proxy servers, the article is very detailed, has a certain reference value, interested friends must read it!

1. HTTP agent.

For everyone who surfs the Internet, www is all too familiar. Www connection requests use the http protocol, so we use the http agent when browsing the web and downloading data (we can also use the ftp protocol). Its ports are generally 80, 3128, 8080 and other proxy server ports.

2. Socks proxy, corresponding to this, the proxy server using socks protocol is SOCKS server, which belongs to general proxy server.

Developed by DavidKoblas in 1990, socks is a circuit-level low-level gateway and has since become an open standard for the InternetRFC standard. Socks does not require applications to follow a specific operating system platform. Unlike application layer agents and HTTP layer agents, Socks agents simply pass packets without paying attention to application protocols (such as FTP, HTTP, and NNTP requests). As a result, Socks agents are faster than other application layer agents. It is generally bound to port 1080 of the proxy server.

3. Proxy server is the technology of establishing private network on public network.

This point is called virtual network, mainly because in the VPN network, the connection between any two nodes does not need to establish the point-to-point physical link required by the traditional private network, but a logical network built on the network platform provided by the public network service provider ISP. In the public network (Internet), the user's data is transmitted through the logical tunnel (Tunnel) established by ISP, that is, the point-to-point virtual private line. The use of corresponding encryption and authentication technology ensures the secure transmission of users' internal network data on the public network, and makes the network data truly proprietary.

4. Reverse proxy.

A reverse proxy server is set up on the server side to reduce the workload of the server by buffering frequently requested pages. Install reverse proxy server for the following reasons: 1, encryption and SSL acceleration 2, load balancing 3, cache static content 4, compression deceleration upload 5. Public network security release 6. Most reverse proxies are squid using open source code.

FTP agent: the ability to proxy FTP software on the client side to access the FTP server.

RTSP proxy: the client proxy Realplayer accesses the Real streaming server.

POP3 agent: on the agent client, the mail software receives and sends messages through POP3.

The above is all the contents of this article "what are the types of proxy servers abroad?" Thank you for your reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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