**How to Check if a Proxy is Active with Telnet and Curl** **Introduction** A proxy server is a server that acts as an intermediary between a client and a server. When a client sends a request to a server through a proxy server, the proxy server forwards the request to the destination server and then forwards the response back to the client. This can be used to improve performance, security, and/or privacy. One way to check if a proxy is active is to use the telnet command. Telnet is a terminal emulation program that allows you to connect to a remote server and send commands. To use telnet to check if a proxy is active, follow these steps: 1. Open a terminal window. 2. Type the following command: [. Chi tiết tại: https://tricksmmo.com/threads/kiem-tra-proxy-co-hoat-dong-hay-khong-voi-telnet-va-curl.126712/
