Syntax: ssi_silent_errors on | off; Default: ssi_silent_errors off; Context: http, server, location If enabled, suppresses the output of the “[an error occurred while processing the directive]” string if an error occurred during SSI processing.

Syntax: scgi_cache_revalidate on | off; Default: scgi_cache_revalidate off; Context: http, server, location This directive appeared in version 1.5.7. Enables revalidation of expired cache items using conditional requests with the “If-Modified-Since” and “If-None-Match” header fields.

Syntax: auth_jwt string [token=$variable] | off; Default: auth_jwt off; Context: http, server, location Enables validation of JSON Web Token. The specified string is used as a realm. Parameter value can contain variables. The optional token parameter specifies a variable that contains JSON Web Token. By default, JWT is passed in the “Authorization” header as a Bearer Token. JWT may be also passed as a cookie or a part of a query string: auth_jwt "closed site" token

Syntax: flv; Default: — Context: location Turns on module processing in a surrounding location.

Syntax: limit_req_status code; Default: limit_req_status 503; Context: http, server, location This directive appeared in version 1.3.15. Sets the status code to return in response to rejected requests.

Syntax: fastcgi_cache_lock_age time; Default: fastcgi_cache_lock_age 5s; Context: http, server, location This directive appeared in version 1.7.8. If the last request passed to the FastCGI server for populating a new cache element has not completed for the specified time, one more request may be passed to the FastCGI server.

Syntax: server { ... } Default: — Context: mail Sets the configuration for a server.

Syntax: uwsgi_hide_header field; Default: — Context: http, server, location By default, nginx does not pass the header fields “Status” and “X-Accel-...” from the response of a uwsgi server to a client. The uwsgi_hide_header directive sets additional fields that will not be passed. If, on the contrary, the passing of fields needs to be permitted, the uwsgi_pass_header directive can be used.

Syntax: imap_client_buffer size; Default: imap_client_buffer 4k|8k; Context: mail, server Sets the IMAP commands read buffer size. By default, the buffer size is equal to one memory page. This is either 4K or 8K, depending on a platform.

Syntax: allow address | CIDR | unix: | all; Default: — Context: http, server, location, limit_except Allows access for the specified network or address. If the special value unix: is specified (1.5.1), allows access for all UNIX-domain sockets.