Syntax: pop3_auth method ...; Default: pop3_auth plain; Context: mail, server Sets permitted methods of authentication for POP3 clients. Supported methods are: plain USER/PASS, AUTH PLAIN, AUTH LOGIN. It is not possible to disable these methods. apop APOP. In order for this method to work, the password must be stored unencrypted. cram-md5 AUTH CRAM-MD5. In order for this method to work, the password must be stored unencrypted. external AUTH EXTERNAL (1.11.6).

Syntax: uwsgi_cache_valid [code ...] time; Default: — Context: http, server, location Sets caching time for different response codes. For example, the following directives uwsgi_cache_valid 200 302 10m; uwsgi_cache_valid 404 1m; set 10 minutes of caching for responses with codes 200 and 302 and 1 minute for responses with code 404. If only caching time is specified uwsgi_cache_valid 5m; then only 200, 301, and 302 responses are cached. In addition, the any paramete

Syntax: accept_mutex on | off; Default: accept_mutex off; Context: events If accept_mutex is enabled, worker processes will accept new connections by turn. Otherwise, all worker processes will be notified about new connections, and if volume of new connections is low, some of the worker processes may just waste system resources. There is no need to enable accept_mutex on systems that support the EPOLLEXCLUSIVE flag (1.11.3) or when using reuseport. Prior to version 1.11.3, the

Syntax: fastcgi_send_timeout time; Default: fastcgi_send_timeout 60s; Context: http, server, location Sets a timeout for transmitting a request to the FastCGI server. The timeout is set only between two successive write operations, not for the transmission of the whole request. If the FastCGI server does not receive anything within this time, the connection is closed.

Syntax: proxy_limit_rate rate; Default: proxy_limit_rate 0; Context: http, server, location This directive appeared in version 1.7.7. Limits the speed of reading the response from the proxied server. The rate is specified in bytes per second. The zero value disables rate limiting. The limit is set per a request, and so if nginx simultaneously opens two connections to the proxied server, the overall rate will be twice as much as the specified limit. The limitation works only if buf

Syntax: xslt_stylesheet stylesheet [parameter=value ...]; Default: — Context: location Defines the XSLT stylesheet and its optional parameters. A stylesheet is compiled at the configuration stage. Parameters can either be specified separately, or grouped in a single line using the “:” delimiter. If a parameter includes the “:” character, it should be escaped as “%3A”. Also, libxslt requires to enclose parameters that contain non-alphanumeric characters into single or dou

Syntax: image_filter off;image_filter test;image_filter size;image_filter rotate 90 | 180 | 270;image_filter resize width height;image_filter crop width height; Default: image_filter off; Context: location Sets the type of transformation to perform on images: off turns off module processing in a surrounding location. test ensures that responses are images in either JPEG, GIF, PNG, or WebP format. Otherwise, the 415 (Unsupported Media Type)

Syntax: server_names_hash_bucket_size size; Default: server_names_hash_bucket_size 32|64|128; Context: http Sets the bucket size for the server names hash tables. The default value depends on the size of the processor’s cache line. The details of setting up hash tables are provided in a separate document.

Syntax: uwsgi_next_upstream_tries number; Default: uwsgi_next_upstream_tries 0; Context: http, server, location This directive appeared in version 1.7.5. Limits the number of possible tries for passing a request to the next server. The 0 value turns off this limitation.

Syntax: proxy_cookie_path off;proxy_cookie_path path replacement; Default: proxy_cookie_path off; Context: http, server, location This directive appeared in version 1.1.15. Sets a text that should be changed in the path attribute of the “Set-Cookie” header fields of a proxied server response. Suppose a proxied server returned the “Set-Cookie” header field with the attribute “path=/two/some/uri/”. The directive proxy_cookie_path /two/ /; will rewrite this attribute to “path=/so