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Apache HTTP Server Version 2.4

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Directive Quick Reference

The directive quick reference shows the usage, default, status, and context of each Apache configuration directive. For more information about each of these, see the Directive Dictionary.

The first column gives the directive name and usage. The second column shows the default value of the directive, if a default exists. If the default is too large to display, it will be truncated and followed by "+".

The third and fourth columns list the contexts where the directive is allowed and the status of the directive according to the legend tables below.

A  |  B  |  C  |  D  |  E  |  F  |  G  |  H  |  I  |  K  |  L  |  M  |  N  |  O  |  P  |  Q  |  R  |  S  |  T  |  U  |  V  |  W  |  X

s server config v virtual host d directory h .htaccess p proxy section

C Core M MPM B Base E Extension X Experimental T External

AcceptFilter protocol accept_filter		s	C
Configures optimizations for a Protocol's Listener Sockets
AcceptPathInfo On|Off|Default	Default	svdh	C
Resources accept trailing pathname information
AccessFileName filename [filename] ...	.htaccess	sv	C
Name of the distributed configuration file
Action action-type cgi-script [virtual]		svdh	B
Activates a CGI script for a particular handler or content-type
AddAlt string file [file] ...		svdh	B
Alternate text to display for a file, instead of an icon selected by filename
AddAltByEncoding string MIME-encoding [MIME-encoding] ...		svdh	B
Alternate text to display for a file instead of an icon selected by MIME-encoding
AddAltByType string MIME-type [MIME-type] ...		svdh	B
Alternate text to display for a file, instead of an icon selected by MIME content-type
AddCharset charset extension [extension] ...		svdh	B
Maps the given filename extensions to the specified content charset
AddDefaultCharset On|Off|charset	Off	svdh	C
Default charset parameter to be added when a response content-type is text/plain or text/html
AddDescription string file [file] ...		svdh	B
Description to display for a file
AddEncoding encoding extension [extension] ...		svdh	B
Maps the given filename extensions to the specified encoding type
AddHandler handler-name extension [extension] ...		svdh	B
Maps the filename extensions to the specified handler
AddIcon icon name [name] ...		svdh	B
Icon to display for a file selected by name
AddIconByEncoding icon MIME-encoding [MIME-encoding] ...		svdh	B
Icon to display next to files selected by MIME content-encoding
AddIconByType icon MIME-type [MIME-type] ...		svdh	B
Icon to display next to files selected by MIME content-type
AddInputFilter filter[;filter...] extension [extension] ...		svdh	B
Maps filename extensions to the filters that will process client requests
AddLanguage language-tag extension [extension] ...		svdh	B
Maps the given filename extension to the specified content language
AddModuleInfo module-name string		sv	E
Adds additional information to the module information displayed by the server-info handler
AddOutputFilter filter[;filter...] extension [extension] ...		svdh	B
Maps filename extensions to the filters that will process responses from the server
AddOutputFilterByType filter[;filter...] media-type [media-type] ...		svdh	B
assigns an output filter to a particular media-type
AddType media-type extension [extension] ...		svdh	B
Maps the given filename extensions onto the specified content type
Alias [URL-path] file-path|directory-path		svd	B
Maps URLs to filesystem locations
AliasMatch regex file-path|directory-path		sv	B
Maps URLs to filesystem locations using regular expressions
AliasPreservePath OFF|ON	OFF	svd	B
Map the full path after the alias in a location.
Allow from all|host|env=[!]env-variable [host|env=[!]env-variable] ...		dh	E
Controls which hosts can access an area of the server
AllowCONNECT port[-port] [port[-port]] ...	443 563	sv	E
Ports that are allowed to CONNECT through the proxy
AllowEncodedSlashes On|Off|NoDecode	Off	sv	C
Determines whether encoded path separators in URLs are allowed to be passed through
AllowMethods reset|HTTP-method [HTTP-method]...	reset	d	X
Restrict access to the listed HTTP methods
AllowOverride All|None|directive-type [directive-type] ...	None (2.3.9 and lat +	d	C
Types of directives that are allowed in .htaccess files
AllowOverrideList None|directive [directive-type] ...	None	d	C
Individual directives that are allowed in .htaccess files
Anonymous user [user] ...		dh	E
Specifies userIDs that are allowed access without password verification
Anonymous_LogEmail On|Off	On	dh	E
Sets whether the password entered will be logged in the error log
Anonymous_MustGiveEmail On|Off	On	dh	E
Specifies whether blank passwords are allowed
Anonymous_NoUserID On|Off	Off	dh	E
Sets whether the userID field may be empty
Anonymous_VerifyEmail On|Off	Off	dh	E
Sets whether to check the password field for a correctly formatted email address
AsyncRequestWorkerFactor factor		s	M
Limit concurrent connections per process
AuthBasicAuthoritative On|Off	On	dh	B
Sets whether authorization and authentication are passed to lower level modules
AuthBasicFake off|username [password]		dh	B
Fake basic authentication using the given expressions for username and password
AuthBasicProvider provider-name [provider-name] ...	file	dh	B
Sets the authentication provider(s) for this location
AuthBasicUseDigestAlgorithm MD5|Off	Off	dh	B
Check passwords against the authentication providers as if Digest Authentication was in force instead of Basic Authentication.
AuthDBDUserPWQuery query		d	E
SQL query to look up a password for a user
AuthDBDUserRealmQuery query		d	E
SQL query to look up a password hash for a user and realm.
AuthDBMGroupFile file-path		dh	E
Sets the name of the database file containing the list of user groups for authorization
AuthDBMType default|SDBM|GDBM|NDBM|DB	default	dh	E
Sets the type of database file that is used to store passwords
AuthDBMUserFile file-path		dh	E
Sets the name of a database file containing the list of users and passwords for authentication
AuthDigestAlgorithm MD5|MD5-sess	MD5	dh	E
Selects the algorithm used to calculate the challenge and response hashes in digest authentication
AuthDigestDomain URI [URI] ...		dh	E
URIs that are in the same protection space for digest authentication
AuthDigestNonceLifetime seconds	300	dh	E
How long the server nonce is valid
AuthDigestProvider provider-name [provider-name] ...	file	dh	E
Sets the authentication provider(s) for this location
AuthDigestQop none|auth|auth-int [auth|auth-int]	auth	dh	E
Determines the quality-of-protection to use in digest authentication
AuthDigestShmemSize size	1000	s	E
The amount of shared memory to allocate for keeping track of clients
AuthFormAuthoritative On|Off	On	dh	B
Sets whether authorization and authentication are passed to lower level modules
AuthFormBody fieldname	httpd_body	d	B
The name of a form field carrying the body of the request to attempt on successful login
AuthFormDisableNoStore On|Off	Off	d	B
Disable the CacheControl no-store header on the login page
AuthFormFakeBasicAuth On|Off	Off	d	B
Fake a Basic Authentication header
AuthFormLocation fieldname	httpd_location	d	B
The name of a form field carrying a URL to redirect to on successful login
AuthFormLoginRequiredLocation url		d	B
The URL of the page to be redirected to should login be required
AuthFormLoginSuccessLocation url		d	B
The URL of the page to be redirected to should login be successful
AuthFormLogoutLocation uri		d	B
The URL to redirect to after a user has logged out
AuthFormMethod fieldname	httpd_method	d	B
The name of a form field carrying the method of the request to attempt on successful login
AuthFormMimetype fieldname	httpd_mimetype	d	B
The name of a form field carrying the mimetype of the body of the request to attempt on successful login
AuthFormPassword fieldname	httpd_password	d	B
The name of a form field carrying the login password
AuthFormProvider provider-name [provider-name] ...	file	dh	B
Sets the authentication provider(s) for this location
AuthFormSitePassphrase secret		d	B
Bypass authentication checks for high traffic sites
AuthFormSize size	8192	d	B
The largest size of the form in bytes that will be parsed for the login details
AuthFormUsername fieldname	httpd_username	d	B
The name of a form field carrying the login username
AuthGroupFile file-path		dh	B
Sets the name of a text file containing the list of user groups for authorization
AuthLDAPAuthorizePrefix prefix	AUTHORIZE_	dh	E
Specifies the prefix for environment variables set during authorization
AuthLDAPBindAuthoritative off|on	on	dh	E
Determines if other authentication providers are used when a user can be mapped to a DN but the server cannot successfully bind with the user's credentials.
AuthLDAPBindDN distinguished-name		dh	E
Optional DN to use in binding to the LDAP server
AuthLDAPBindPassword password		dh	E
Password used in conjunction with the bind DN
AuthLDAPCharsetConfig file-path		s	E
Language to charset conversion configuration file
AuthLDAPCompareAsUser on|off	off	dh	E
Use the authenticated user's credentials to perform authorization comparisons
AuthLDAPCompareDNOnServer on|off	on	dh	E
Use the LDAP server to compare the DNs
AuthLDAPDereferenceAliases never|searching|finding|always	always	dh	E
When will the module de-reference aliases
AuthLDAPGroupAttribute attribute	member uniqueMember +	dh	E
LDAP attributes used to identify the user members of groups.
AuthLDAPGroupAttributeIsDN on|off	on	dh	E
Use the DN of the client username when checking for group membership
AuthLDAPInitialBindAsUser off|on	off	dh	E
Determines if the server does the initial DN lookup using the basic authentication users' own username, instead of anonymously or with hard-coded credentials for the server
AuthLDAPInitialBindPattern regex substitution	(.*) $1 (remote use +	dh	E
Specifies the transformation of the basic authentication username to be used when binding to the LDAP server to perform a DN lookup
AuthLDAPMaxSubGroupDepth Number	10	dh	E
Specifies the maximum sub-group nesting depth that will be evaluated before the user search is discontinued.
AuthLDAPRemoteUserAttribute uid		dh	E
Use the value of the attribute returned during the user query to set the REMOTE_USER environment variable
AuthLDAPRemoteUserIsDN on|off	off	dh	E
Use the DN of the client username to set the REMOTE_USER environment variable
AuthLDAPSearchAsUser on|off	off	dh	E
Use the authenticated user's credentials to perform authorization searches
AuthLDAPSubGroupAttribute attribute	member uniqueMember +	dh	E
Specifies the attribute labels, one value per directive line, used to distinguish the members of the current group that are groups.
AuthLDAPSubGroupClass LdapObjectClass	groupOfNames groupO +	dh	E
Specifies which LDAP objectClass values identify directory objects that are groups during sub-group processing.
AuthLDAPURL url [NONE|SSL|TLS|STARTTLS]		dh	E
URL specifying the LDAP search parameters
AuthMerging Off | And | Or	Off	dh	B
Controls the manner in which each configuration section's authorization logic is combined with that of preceding configuration sections.
AuthName auth-domain		dh	B
Authorization realm for use in HTTP authentication
AuthnCacheContext directory|server|custom-string	directory	d	B
Specify a context string for use in the cache key
AuthnCacheEnable		s	B
Enable Authn caching configured anywhere
AuthnCacheProvideFor authn-provider [...]		dh	B
Specify which authn provider(s) to cache for
AuthnCacheSOCache provider-name[:provider-args]		s	B
Select socache backend provider to use
AuthnCacheTimeout timeout (seconds)	300 (5 minutes)	dh	B
Set a timeout for cache entries
<AuthnProviderAlias baseProvider Alias> ... </AuthnProviderAlias>		s	B
Enclose a group of directives that represent an extension of a base authentication provider and referenced by the specified alias
AuthnzFcgiCheckAuthnProvider provider-name|None option ...		d	E
Enables a FastCGI application to handle the check_authn authentication hook.
AuthnzFcgiDefineProvider type provider-name backend-address		s	E
Defines a FastCGI application as a provider for authentication and/or authorization
AuthType None|Basic|Digest|Form		dh	B
Type of user authentication
AuthUserFile file-path		dh	B
Sets the name of a text file containing the list of users and passwords for authentication
AuthzDBDLoginToReferer On|Off	Off	d	E
Determines whether to redirect the Client to the Referring page on successful login or logout if a Referer request header is present
AuthzDBDQuery query		d	E
Specify the SQL Query for the required operation
AuthzDBDRedirectQuery query		d	E
Specify a query to look up a login page for the user
AuthzDBMType default|SDBM|GDBM|NDBM|DB	default	dh	E
Sets the type of database file that is used to store list of user groups
<AuthzProviderAlias baseProvider Alias Require-Parameters> ... </AuthzProviderAlias>		s	B
Enclose a group of directives that represent an extension of a base authorization provider and referenced by the specified alias
AuthzSendForbiddenOnFailure On|Off	Off	dh	B
Send '403 FORBIDDEN' instead of '401 UNAUTHORIZED' if authentication succeeds but authorization fails
BalancerGrowth #	5	sv	E
Number of additional Balancers that can be added Post-configuration
BalancerInherit On|Off	On	sv	E
Inherit ProxyPassed Balancers/Workers from the main server
BalancerMember [balancerurl] url [key=value [key=value ...]]		d	E
Add a member to a load balancing group
BalancerPersist On|Off	Off	sv	E
Attempt to persist changes made by the Balancer Manager across restarts.
BrotliAlterETag AddSuffix|NoChange|Remove	AddSuffix	sv	E
How the outgoing ETag header should be modified during compression
BrotliCompressionMaxInputBlock value		sv	E
Maximum input block size
BrotliCompressionQuality value	5	sv	E
Compression quality
BrotliCompressionWindow value	18	sv	E
Brotli sliding compression window size
BrotliFilterNote [type] notename		sv	E
Places the compression ratio in a note for logging
BrowserMatch regex [!]env-variable[=value] [[!]env-variable[=value]] ...		svdh	B
Sets environment variables conditional on HTTP User-Agent
BrowserMatchNoCase regex [!]env-variable[=value] [[!]env-variable[=value]] ...		svdh	B
Sets environment variables conditional on User-Agent without respect to case
BufferedLogs On|Off	Off	s	B
Buffer log entries in memory before writing to disk
BufferSize integer	131072	svdh	E
Maximum size in bytes to buffer by the buffer filter
CacheDefaultExpire seconds	3600 (one hour)	svdh	E
The default duration to cache a document when no expiry date is specified.
CacheDetailHeader on|off	off	svdh	E
Add an X-Cache-Detail header to the response.
CacheDirLength length	2	sv	E
The number of characters in subdirectory names
CacheDirLevels levels	2	sv	E
The number of levels of subdirectories in the cache.
CacheDisable url-string | on		svdh	E
Disable caching of specified URLs
CacheEnable cache_type [url-string]		svd	E
Enable caching of specified URLs using a specified storage manager
CacheFile file-path [file-path] ...		s	X
Cache a list of file handles at startup time
CacheHeader on|off	off	svdh	E
Add an X-Cache header to the response.
CacheIgnoreCacheControl On|Off	Off	sv	E
Ignore request to not serve cached content to client
CacheIgnoreHeaders header-string [header-string] ...	None	sv	E
Do not store the given HTTP header(s) in the cache.
CacheIgnoreNoLastMod On|Off	Off	svdh	E
Ignore the fact that a response has no Last Modified header.
CacheIgnoreQueryString On|Off	Off	sv	E
Ignore query string when caching
CacheIgnoreURLSessionIdentifiers identifier [identifier] ...	None	sv	E
Ignore defined session identifiers encoded in the URL when caching
CacheKeyBaseURL URL		sv	E
Override the base URL of reverse proxied cache keys.
CacheLastModifiedFactor float	0.1	svdh	E
The factor used to compute an expiry date based on the LastModified date.
CacheLock on|off	off	sv	E
Enable the thundering herd lock.
CacheLockMaxAge integer	5	sv	E
Set the maximum possible age of a cache lock.
CacheLockPath directory	/tmp/mod_cache-lock +	sv	E
Set the lock path directory.
CacheMaxExpire seconds	86400 (one day)	svdh	E
The maximum time in seconds to cache a document
CacheMaxFileSize bytes	1000000	svdh	E
The maximum size (in bytes) of a document to be placed in the cache
CacheMinExpire seconds	0	svdh	E
The minimum time in seconds to cache a document
CacheMinFileSize bytes	1	svdh	E
The minimum size (in bytes) of a document to be placed in the cache
CacheNegotiatedDocs On|Off	Off	sv	B
Allows content-negotiated documents to be cached by proxy servers
CacheQuickHandler on|off	on	sv	E
Run the cache from the quick handler.
CacheReadSize bytes	0	svdh	E
The minimum size (in bytes) of the document to read and be cached before sending the data downstream
CacheReadTime milliseconds	0	svdh	E
The minimum time (in milliseconds) that should elapse while reading before data is sent downstream
CacheRoot directory		sv	E
The directory root under which cache files are stored
CacheSocache type[:args]		sv	E
The shared object cache implementation to use
CacheSocacheMaxSize bytes	102400	svdh	E
The maximum size (in bytes) of an entry to be placed in the cache
CacheSocacheMaxTime seconds	86400	svdh	E
The maximum time (in seconds) for a document to be placed in the cache
CacheSocacheMinTime seconds	600	svdh	E
The minimum time (in seconds) for a document to be placed in the cache
CacheSocacheReadSize bytes	0	svdh	E
The minimum size (in bytes) of the document to read and be cached before sending the data downstream
CacheSocacheReadTime milliseconds	0	svdh	E
The minimum time (in milliseconds) that should elapse while reading before data is sent downstream
CacheStaleOnError on|off	on	svdh	E
Serve stale content in place of 5xx responses.
CacheStoreExpired On|Off	Off	svdh	E
Attempt to cache responses that the server reports as expired
CacheStoreNoStore On|Off	Off	svdh	E
Attempt to cache requests or responses that have been marked as no-store.
CacheStorePrivate On|Off	Off	svdh	E
Attempt to cache responses that the server has marked as private
CGIDScriptTimeout time[s|ms]		svdh	B
The length of time to wait for more output from the CGI program
CGIMapExtension cgi-path .extension		dh	C
Technique for locating the interpreter for CGI scripts
CGIPassAuth On|Off	Off	dh	C
Enables passing HTTP authorization headers to scripts as CGI variables
CGIScriptTimeout time[s|ms]		svdh	B
The length of time to wait for more output from the CGI program
CGIVar variable rule		dh	C
Controls how some CGI variables are set
CharsetDefault charset		svdh	E
Charset to translate into
CharsetOptions option [option] ...	ImplicitAdd	svdh	E
Configures charset translation behavior
CharsetSourceEnc charset		svdh	E
Source charset of files
CheckBasenameMatch on|off	On	svdh	E
Also match files with differing file name extensions.
CheckCaseOnly on|off	Off	svdh	E
Limits the action of the speling module to case corrections
CheckSpelling on|off	Off	svdh	E
Enables the spelling module
ChrootDir /path/to/directory		s	B
Directory for apache to run chroot(8) after startup.
ContentDigest On|Off	Off	svdh	C
Enables the generation of Content-MD5 HTTP Response headers
CookieDomain domain		svdh	E
The domain to which the tracking cookie applies
CookieExpires expiry-period		svdh	E
Expiry time for the tracking cookie
CookieHTTPOnly on|off	off	svdh	E
Adds the 'HTTPOnly' attribute to the cookie
CookieName token	Apache	svdh	E
Name of the tracking cookie
CookieSameSite None|Lax|Strict		svdh	E
Adds the 'SameSite' attribute to the cookie
CookieSecure on|off	off	svdh	E
Adds the 'Secure' attribute to the cookie
CookieStyle Netscape|Cookie|Cookie2|RFC2109|RFC2965	Netscape	svdh	E
Format of the cookie header field
CookieTracking on|off	off	svdh	E
Enables tracking cookie
CoreDumpDirectory directory		s	M
Directory where Apache HTTP Server attempts to switch before dumping core
CustomLog file|pipe format|nickname [env=[!]environment-variable| expr=expression]		sv	B
Sets filename and format of log file
Dav On|Off|provider-name	Off	d	E
Enable WebDAV HTTP methods
DavBasePath root-path		d	E
Configure repository root path
DavDepthInfinity on|off	off	svd	E
Allow PROPFIND, Depth: Infinity requests
DavGenericLockDB file-path		svd	E
Location of the DAV lock database
DavLockDB file-path		sv	E
Location of the DAV lock database
DavLockDiscovery on|off	on	svdh	E
Enable lock discovery
DavMinTimeout seconds	0	svd	E
Minimum amount of time the server holds a lock on a DAV resource
DBDExptime time-in-seconds	300	sv	E
Keepalive time for idle connections
DBDInitSQL "SQL statement"		sv	E
Execute an SQL statement after connecting to a database
DBDKeep number	2	sv	E
Maximum sustained number of connections
DBDMax number	10	sv	E
Maximum number of connections
DBDMin number	1	sv	E
Minimum number of connections
DBDParams param1=value1[,param2=value2]		sv	E
Parameters for database connection
DBDPersist On|Off		sv	E
Whether to use persistent connections
DBDPrepareSQL "SQL statement" label		sv	E
Define an SQL prepared statement
DBDriver name		sv	E
Specify an SQL driver
DefaultIcon url-path		svdh	B
Icon to display for files when no specific icon is configured
DefaultLanguage language-tag		svdh	B
Defines a default language-tag to be sent in the Content-Language header field for all resources in the current context that have not been assigned a language-tag by some other means.
DefaultRuntimeDir directory-path	DEFAULT_REL_RUNTIME +	s	C
Base directory for the server run-time files
DefaultType media-type|none	none	svdh	C
This directive has no effect other than to emit warnings if the value is not none. In prior versions, DefaultType would specify a default media type to assign to response content for which no other media type configuration could be found.
Define parameter-name [parameter-value]		svd	C
Define a variable
DeflateAlterETag AddSuffix|NoChange|Remove	AddSuffix	sv	E
How the outgoing ETag header should be modified during compression
DeflateBufferSize value	8096	sv	E
Fragment size to be compressed at one time by zlib
DeflateCompressionLevel value		sv	E
How much compression do we apply to the output
DeflateFilterNote [type] notename		sv	E
Places the compression ratio in a note for logging
DeflateInflateLimitRequestBody value		svdh	E
Maximum size of inflated request bodies
DeflateInflateRatioBurst value	3	svdh	E
Maximum number of times the inflation ratio for request bodies can be crossed
DeflateInflateRatioLimit value	200	svdh	E
Maximum inflation ratio for request bodies
DeflateMemLevel value	9	sv	E
How much memory should be used by zlib for compression
DeflateWindowSize value	15	sv	E
Zlib compression window size
Deny from all|host|env=[!]env-variable [host|env=[!]env-variable] ...		dh	E
Controls which hosts are denied access to the server
<Directory directory-path> ... </Directory>		sv	C
Enclose a group of directives that apply only to the named file-system directory, sub-directories, and their contents.
DirectoryCheckHandler On|Off	Off	svdh	B
Toggle how this module responds when another handler is configured
DirectoryIndex disabled | local-url [local-url] ...	index.html	svdh	B
List of resources to look for when the client requests a directory
DirectoryIndexRedirect on | off | permanent | temp | seeother | 3xx-code	off	svdh	B
Configures an external redirect for directory indexes.
<DirectoryMatch regex> ... </DirectoryMatch>		sv	C
Enclose directives that apply to the contents of file-system directories matching a regular expression.
DirectorySlash On|Off	On	svdh	B
Toggle trailing slash redirects on or off
DocumentRoot directory-path	"/usr/local/apache/ +	sv	C
Directory that forms the main document tree visible from the web
DTracePrivileges On|Off	Off	s	X
Determines whether the privileges required by dtrace are enabled.
DumpIOInput On|Off	Off	s	E
Dump all input data to the error log
DumpIOOutput On|Off	Off	s	E
Dump all output data to the error log
<Else> ... </Else>		svdh	C
Contains directives that apply only if the condition of a previous <If> or <ElseIf> section is not satisfied by a request at runtime
<ElseIf expression> ... </ElseIf>		svdh	C
Contains directives that apply only if a condition is satisfied by a request at runtime while the condition of a previous <If> or <ElseIf> section is not satisfied
EnableExceptionHook On|Off	Off	s	M
Enables a hook that runs exception handlers after a crash
EnableMMAP On|Off	On	svdh	C
Use memory-mapping to read files during delivery
EnableSendfile On|Off	Off	svdh	C
Use the kernel sendfile support to deliver files to the client
Error message		svdh	C
Abort configuration parsing with a custom error message
ErrorDocument error-code document		svdh	C
What the server will return to the client in case of an error
ErrorLog file-path|syslog[:[facility][:tag]]	logs/error_log (Uni +	sv	C
Location where the server will log errors
ErrorLogFormat [connection|request] format		sv	C
Format specification for error log entries
Example		svdh	X
Demonstration directive to illustrate the Apache module API
ExpiresActive On|Off	Off	svdh	E
Enables generation of Expires headers
ExpiresByType MIME-type <code>seconds		svdh	E
Value of the Expires header configured by MIME type
ExpiresDefault <code>seconds		svdh	E
Default algorithm for calculating expiration time
ExtendedStatus On|Off	Off[*]	s	C
Keep track of extended status information for each request
ExtFilterDefine filtername parameters		s	E
Define an external filter
ExtFilterOptions option [option] ...	NoLogStderr	d	E
Configure mod_ext_filter options
FallbackResource disabled | local-url		svdh	B
Define a default URL for requests that don't map to a file
FileETag component ...	MTime Size	svdh	C
File attributes used to create the ETag HTTP response header for static files
<Files filename> ... </Files>		svdh	C
Contains directives that apply to matched filenames
<FilesMatch regex> ... </FilesMatch>		svdh	C
Contains directives that apply to regular-expression matched filenames
FilterChain [+=-@!]filter-name ...		svdh	B
Configure the filter chain
FilterDeclare filter-name [type]		svdh	B
Declare a smart filter
FilterProtocol filter-name [provider-name] proto-flags		svdh	B
Deal with correct HTTP protocol handling
FilterProvider filter-name provider-name expression		svdh	B
Register a content filter
FilterTrace filter-name level		svd	B
Get debug/diagnostic information from mod_filter
FlushMaxPipelined number	5	sv	C
Maximum number of pipelined responses above which they are flushed to the network
FlushMaxThreshold number-of-bytes	65535	sv	C
Threshold above which pending data are flushed to the network
ForceLanguagePriority None|Prefer|Fallback [Prefer|Fallback]	Prefer	svdh	B
Action to take if a single acceptable document is not found
ForceType media-type|None		dh	C
Forces all matching files to be served with the specified media type in the HTTP Content-Type header field
ForensicLog filename|pipe		sv	E
Sets filename of the forensic log
GlobalLogfile|pipe format|nickname [env=[!]environment-variable| expr=expression]		s	B
Sets filename and format of log file
GprofDir /tmp/gprof/|/tmp/gprof/%		sv	C
Directory to write gmon.out profiling data to.
GracefulShutdownTimeout seconds	0	s	M
Specify a timeout after which a gracefully shutdown server will exit.
Group unix-group	#-1	s	B
Group under which the server will answer requests
H2CopyFiles on|off	off	svdh	E
Determine file handling in responses
H2Direct on|off	on for h2c, off for +	sv	E
H2 Direct Protocol Switch
H2EarlyHint name value		svdh	E
Add a response header to be picked up in 103 Early Hints
H2EarlyHints on|off	off	sv	E
Determine sending of 103 status codes
H2MaxDataFrameLen n	0	sv	E
Maximum bytes inside a single HTTP/2 DATA frame
H2MaxSessionStreams n	100	sv	E
Maximum number of active streams per HTTP/2 session.
H2MaxWorkerIdleSeconds n	600	s	E
Maximum number of seconds h2 workers remain idle until shut down.
H2MaxWorkers n		s	E
Maximum number of worker threads to use per child process.
H2MinWorkers n		s	E
Minimal number of worker threads to use per child process.
H2ModernTLSOnly on|off	on	sv	E
Require HTTP/2 connections to be "modern TLS" only
H2OutputBuffering on|off	on	sv	E
Determine buffering behaviour of output
H2Padding numbits	0	sv	E
Determine the range of padding bytes added to payload frames
H2ProxyRequests on|off	off	sv	E
En-/Disable forward proxy requests via HTTP/2
H2Push on|off	on	svdh	E
H2 Server Push Switch
H2PushDiarySize n	256	sv	E
H2 Server Push Diary Size
H2PushPriority mime-type [after|before|interleaved] [weight]	* After 16	sv	E
H2 Server Push Priority
H2PushResource [add] path [critical]		svdh	E
Declares resources for early pushing to the client
H2SerializeHeaders on|off	off	sv	E
Serialize Request/Response Processing Switch
H2StreamMaxMemSize bytes	65536	sv	E
Maximum amount of output data buffered per stream.
H2StreamTimeout time-interval[s]		svd	E
Maximum time waiting when sending/receiving data to stream processing
H2TLSCoolDownSecs seconds	1	sv	E
Configure the number of seconds of idle time on TLS before shrinking writes
H2TLSWarmUpSize amount	1048576	sv	E
Configure the number of bytes on TLS connection before doing max writes
H2Upgrade on|off	on for h2c, off for +	svdh	E
H2 Upgrade Protocol Switch
H2WebSockets on|off	off	sv	E
En-/Disable WebSockets via HTTP/2
H2WindowSize bytes	65535	sv	E
Size of Stream Window for upstream data.
Header [condition] add|append|echo|edit|edit*|merge|set|setifempty|unset|note header [[expr=]value [replacement] [early|env=[!]varname|expr=expression]]		svdh	E
Configure HTTP response headers
HeaderName filename		svdh	B
Name of the file that will be inserted at the top of the index listing
HeartbeatAddress addr:port		s	X
Multicast address for heartbeat packets
HeartbeatListen addr:port		s	X
multicast address to listen for incoming heartbeat requests
HeartbeatMaxServers number-of-servers	10	s	X
Specifies the maximum number of servers that will be sending heartbeat requests to this server
HeartbeatStorage file-path	logs/hb.dat	s	X
Path to store heartbeat data when using flat-file storage
HeartbeatStorage file-path	logs/hb.dat	s	X
Path to read heartbeat data
HostnameLookups On|Off|Double	Off	svd	C
Enables DNS lookups on client IP addresses
HttpProtocolOptions [Strict|Unsafe] [RegisteredMethods|LenientMethods] [Allow0.9|Require1.0]	Strict LenientMetho +	sv	C
Modify restrictions on HTTP Request Messages
IdentityCheck On|Off	Off	svd	E
Enables logging of the RFC 1413 identity of the remote user
IdentityCheckTimeout seconds	30	svd	E
Determines the timeout duration for ident requests
<If expression> ... </If>		svdh	C
Contains directives that apply only if a condition is satisfied by a request at runtime
<IfDefine [!]parameter-name> ... </IfDefine>		svdh	C
Encloses directives that will be processed only if a test is true at startup
<IfDirective [!]directive-name> ... </IfDirective>		svdh	C
Encloses directives that are processed conditional on the presence or absence of a specific directive
<IfFile [!]filename> ... </IfFile>		svdh	C
Encloses directives that will be processed only if file exists at startup
<IfModule [!]module-file|module-identifier> ... </IfModule>		svdh	C
Encloses directives that are processed conditional on the presence or absence of a specific module
<IfSection [!]section-name> ... </IfSection>		svdh	C
Encloses directives that are processed conditional on the presence or absence of a specific section directive
<IfVersion [[!]operator] version> ... </IfVersion>		svdh	E
contains version dependent configuration
ImapBase map|referer|URL	http://servername/	svdh	B
Default base for imagemap files
ImapDefault error|nocontent|map|referer|URL	nocontent	svdh	B
Default action when an imagemap is called with coordinates that are not explicitly mapped
ImapMenu none|formatted|semiformatted|unformatted	formatted	svdh	B
Action if no coordinates are given when calling an imagemap
Include file-path|directory-path|wildcard		svd	C
Includes other configuration files from within the server configuration files