Syntax: userid_mark letter | digit | = | off; Default: userid_mark off; Context: http, server, location If the parameter is not off, enables the cookie marking mechanism and sets the character used as a mark. This mechanism is used to add or change userid_p3p and/or a cookie expiration time while preserving the client identifier. A mark can be any letter of the English alphabet (case-sensitive), digit, or the “=” character. If the mark is set, it is compared with the

Syntax: ssl_dhparam file; Default: — Context: http, server This directive appeared in version 0.7.2. Specifies a file with DH parameters for DHE ciphers.

Syntax: min_delete_depth number; Default: min_delete_depth 0; Context: http, server, location Allows the DELETE method to remove files provided that the number of elements in a request path is not less than the specified number. For example, the directive min_delete_depth 4; allows removing files on requests /users/00/00/name /users/00/00/name/pic.jpg /users/00/00/page.html and denies the removal of /users/00/00

Syntax: fastcgi_cache_revalidate on | off; Default: fastcgi_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: 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

Syntax: send_lowat size; Default: send_lowat 0; Context: http, server, location If the directive is set to a non-zero value, nginx will try to minimize the number of send operations on client sockets by using either NOTE_LOWAT flag of the kqueue method or the SO_SNDLOWAT socket option. In both cases the specified size is used. This directive is ignored on Linux, Solaris, and Windows.

Syntax: ssl_session_timeout time; Default: ssl_session_timeout 5m; Context: mail, server Specifies a time during which a client may reuse the session parameters.

Syntax: ssi_last_modified on | off; Default: ssi_last_modified off; Context: http, server, location This directive appeared in version 1.5.1. Allows preserving the “Last-Modified” header field from the original response during SSI processing to facilitate response caching. By default, the header field is removed as contents of the response are modified during processing and may contain dynamically generated elements or parts that are changed independently of the original respons

Syntax: uwsgi_cache_methods GET | HEAD | POST ...; Default: uwsgi_cache_methods GET HEAD; Context: http, server, location If the client request method is listed in this directive then the response will be cached. “GET” and “HEAD” methods are always added to the list, though it is recommended to specify them explicitly. See also the uwsgi_no_cache directive.

Syntax: starttls on | off | only; Default: starttls off; Context: mail, server on allow usage of the STLS command for the POP3 and the STARTTLS command for the IMAP; off deny usage of the STLS and STARTTLS commands; only require preliminary TLS transition.