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502 Bad Gateway The server was acting as a gateway or proxy and received an invalid response from the upstream server. 503 Service Unavailable The server cannot handle the request (because it is overloaded or down for maintenance). Generally, this is a temporary state. [26] 504 Gateway Timeout
Nginx is free and open-source software, released under the terms of the 2-clause BSD license. A large fraction of web servers use Nginx, [10] often as a load balancer. [11] A company of the same name was founded in 2011 to provide support and NGINX Plus paid software. [12] In March 2019, the company was acquired by F5 for $670 million. [13]
This is a very brief history of web server programs, so some information necessarily overlaps with the histories of the web browsers, the World Wide Web and the Internet; therefore, for the sake of clarity and understandability, some key historical information below reported may be similar to that found also in one or more of the above-mentioned history articles.
It uses the lowercase nginx, such as when referring to the package name, and in some places in the official pages ... 502 Bad Gateway nginx/1.4.6 (Ubuntu)
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In October 2004, he released the Nginx Web server, reverse proxy, load balancer and HTTP cache software and founded Nginx, Inc. Sysoev was born in 1970 and grew up in Almaty, Kazakhstan, at the time called Alma-Ata in the Kazakh SSR. Sysoev graduated from Bauman Moscow State Technical University in 1994. Since graduation, he has lived in Moscow.
The client sends an HTTP request (method GET, version ≥ 1.1) and the server returns an HTTP response with status code 101 (Switching Protocols) on success.This means a WebSocket server can use the same port as HTTP (80) and HTTPS (443) because the handshake is compatible with HTTP.