le we will call "gulag" which uses no more than 1 megabyte of ram to store session information keyed by remote ip address. This directive is used in conjunction with limit_conn gulag 5. The ngx_http_limit_zone_module only restricts the amount of connections from a single ip address which are currently being processed by the Nginx daemon. An error 503 will be returned to the client if request processing is being blocked at the socket level and new requests from same ip starts. limit_zone will _NOT_ help if your workload is CPU or disk bound. With several workers enabled an
https://calomel.org/nginx.html
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passer la vraie ip qui accède à apache derrière nginx
http://recurser.com/articles/2009/08/...assing-ips-to-apache-with-nginx-proxy
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un bon reverse proxy, comment le configurer.
http://wiki.nginx.org//NginxConfiguration
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