Apache HTTP Server Version 2.4

Apache > HTTP Server > Documentation > Version 2.4 > Modules

# 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 or handler
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
H2MaxHeaderBlockLen n | 0 | sv | E
Maximum size of response headers
H2MaxSessionStreams n | 100 | sv | E
Maximum number of active streams per HTTP/2 session.
H2MaxStreamErrors n | 8 | sv | E
Maximum amount of client caused errors to tolerate
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 behavior 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
IncludeOptional file-path|directory-path|wildcard |  | svd | C
Includes other configuration files from within the server configuration files
IndexHeadInsert "markup ..." |  | svdh | B
Inserts text in the HEAD section of an index page.
IndexIgnore file [file] ... | "." | svdh | B
Adds to the list of files to hide when listing a directory
IndexIgnoreReset ON|OFF |  | svdh | B
Empties the list of files to hide when listing a directory
IndexOptions [+|-]option [[+|-]option] ... |  | svdh | B
Various configuration settings for directory indexing
IndexOrderDefault Ascending|Descending Name|Date|Size|Description | Ascending Name | svdh | B
Sets the default ordering of the directory index
IndexStyleSheet url-path |  | svdh | B
Adds a CSS stylesheet to the directory index
InputSed sed-command |  | dh | X
Sed command to filter request data (typically `POST` data)
ISAPIAppendLogToErrors on|off | off | svdh | B
Record `HSE_APPEND_LOG_PARAMETER` requests from ISAPI extensions to the error log
ISAPIAppendLogToQuery on|off | on | svdh | B
Record `HSE_APPEND_LOG_PARAMETER` requests from ISAPI extensions to the query field
ISAPICacheFile file-path [file-path] ... |  | sv | B
ISAPI .dll files to be loaded at startup
ISAPIFakeAsync on|off | off | svdh | B
Fake asynchronous support for ISAPI callbacks
ISAPILogNotSupported on|off | off | svdh | B
Log unsupported feature requests from ISAPI extensions
ISAPIReadAheadBuffer size | 49152 | svdh | B
Size of the Read Ahead Buffer sent to ISAPI extensions
KeepAlive On|Off | On | sv | C
Enables HTTP persistent connections
KeepAliveTimeout num[ms] | 5 | sv | C
Amount of time the server will wait for subsequent requests on a persistent connection
KeptBodySize maximum size in bytes | 0 | d | B
Keep the request body instead of discarding it up to the specified maximum size, for potential use by filters such as mod_include.
LanguagePriority MIME-lang [MIME-lang] ... |  | svdh | B
The precedence of language variants for cases where the client does not express a preference
LDAPCacheEntries number | 1024 | s | E
Maximum number of entries in the primary LDAP cache
LDAPCacheTTL seconds | 600 | s | E
Time that cached items remain valid
LDAPConnectionPoolTTL n | -1 | sv | E
Discard backend connections that have been sitting in the connection pool too long
LDAPConnectionTimeout seconds |  | s | E
Specifies the socket connection timeout in seconds
LDAPLibraryDebug 7 |  | s | E
Enable debugging in the LDAP SDK
LDAPOpCacheEntries number | 1024 | s | E
Number of entries used to cache LDAP compare operations
LDAPOpCacheTTL seconds | 600 | s | E
Time that entries in the operation cache remain valid
LDAPReferralHopLimit number |  | dh | E
The maximum number of referral hops to chase before terminating an LDAP query.
LDAPReferrals On|Off|default | On | dh | E
Enable referral chasing during queries to the LDAP server.
LDAPRetries number-of-retries | 3 | s | E
Configures the number of LDAP server retries.
LDAPRetryDelay seconds | 0 | s | E
Configures the delay between LDAP server retries.
LDAPSharedCacheFile directory-path/filename |  | s | E
Sets the shared memory cache file
LDAPSharedCacheSize bytes | 500000 | s | E
Size in bytes of the shared-memory cache
LDAPTimeout seconds | 60 | s | E
Specifies the timeout for LDAP search and bind operations, in seconds
LDAPTrustedClientCert type directory-path/filename/nickname [password] |  | dh | E
Sets the file containing or nickname referring to a per connection client certificate. Not all LDAP toolkits support per connection client certificates.
LDAPTrustedGlobalCert type directory-path/filename [password] |  | s | E
Sets the file or database containing global trusted Certificate Authority or global client certificates
LDAPTrustedMode type |  | sv | E
Specifies the SSL/TLS mode to be used when connecting to an LDAP server.
LDAPVerifyServerCert On|Off | On | s | E
Force server certificate verification
<Limit method [method] ... > ... </Limit> |  | dh | C
Restrict enclosed access controls to only certain HTTP methods
<LimitExcept method [method] ... > ... </LimitExcept> |  | dh | C
Restrict access controls to all HTTP methods except the named ones
LimitInternalRecursion number [number] | 10 | sv | C
Determine maximum number of internal redirects and nested subrequests
LimitRequestBody bytes | 1073741824 | svdh | C
Restricts the total size of the HTTP request body sent from the client
LimitRequestFields number | 100 | sv | C
Limits the number of HTTP request header fields that will be accepted from the client
LimitRequestFieldSize bytes | 8190 | sv | C
Limits the size of the HTTP request header allowed from the client
LimitRequestLine bytes | 8190 | sv | C
Limit the size of the HTTP request line that will be accepted from the client
LimitXMLRequestBody bytes | 1000000 | svdh | C
Limits the size of an XML-based request body
Listen [IP-address:]portnumber [protocol] |  | s | M
IP addresses and ports that the server listens to
ListenBackLog backlog | 511 | s | M
Maximum length of the queue of pending connections
ListenCoresBucketsRatio ratio | 0 (disabled) | s | M
Ratio between the number of CPU cores (online) and the number of listeners' buckets
ListenTCPDeferAccept integer | 30 | s | M
Value set for the socket option TCP_DEFER_ACCEPT if it is set
LoadFile filename [filename] ... |  | sv | E
Link in the named object file or library
LoadModule module filename |  | sv | E
Links in the object file or library, and adds to the list of active modules
<Location URL-path|URL> ... </Location> |  | sv | C
Applies the enclosed directives only to matching URLs
<LocationMatch regex> ... </LocationMatch> |  | sv | C
Applies the enclosed directives only to regular-expression matching URLs
LogFormat format|nickname [nickname] | "%h %l %u %t \"%r\" + | sv | B
Describes a format for use in a log file
LogIOTrackTTFB ON|OFF | OFF | svdh | E
Enable tracking of time to first byte (TTFB)
LogLevel [module:]level [module:level] ... | warn | svd | C
Controls the verbosity of the ErrorLog
LogMessage message [hook=hook] [expr=expression] |  | d | X
Log user-defined message to error log
LuaAuthzProvider provider_name /path/to/lua/script.lua function_name |  | s | E
Plug an authorization provider function into `mod_authz_core`
LuaCodeCache stat|forever|never | stat | svdh | E
Configure the compiled code cache.
LuaHookAccessChecker /path/to/lua/script.lua hook_function_name [early|late] |  | svdh | E
Provide a hook for the access_checker phase of request processing
LuaHookAuthChecker /path/to/lua/script.lua hook_function_name [early|late] |  | svdh | E
Provide a hook for the auth_checker phase of request processing
LuaHookCheckUserID /path/to/lua/script.lua hook_function_name [early|late] |  | svdh | E
Provide a hook for the check_user_id phase of request processing
LuaHookFixups /path/to/lua/script.lua hook_function_name |  | svdh | E
Provide a hook for the fixups phase of a request processing
LuaHookInsertFilter /path/to/lua/script.lua hook_function_name |  | svdh | E
Provide a hook for the insert_filter phase of request processing
LuaHookLog /path/to/lua/script.lua log_function_name |  | svdh | E
Provide a hook for the access log phase of a request processing
LuaHookMapToStorage /path/to/lua/script.lua hook_function_name |  | svdh | E
Provide a hook for the map_to_storage phase of request processing
LuaHookPreTranslate /path/to/lua/script.lua hook_function_name |  | svdh | E
Provide a hook for the pre_translate phase of a request processing
LuaHookTranslateName /path/to/lua/script.lua hook_function_name [early|late] |  | sv | E
Provide a hook for the translate name phase of request processing
LuaHookTypeChecker /path/to/lua/script.lua hook_function_name |  | svdh | E
Provide a hook for the type_checker phase of request processing
LuaInherit none|parent-first|parent-last | parent-first | svdh | E
Controls how parent configuration sections are merged into children
LuaInputFilter filter_name /path/to/lua/script.lua function_name |  | s | E
Provide a Lua function for content input filtering
LuaMapHandler uri-pattern /path/to/lua/script.lua [function-name] |  | svdh | E
Map a path to a lua handler
LuaOutputFilter filter_name /path/to/lua/script.lua function_name |  | s | E
Provide a Lua function for content output filtering
LuaPackageCPath /path/to/include/?.soa |  | svdh | E
Add a directory to lua's package.cpath
LuaPackagePath /path/to/include/?.lua |  | svdh | E
Add a directory to lua's package.path
LuaQuickHandler /path/to/script.lua hook_function_name |  | sv | E
Provide a hook for the quick handler of request processing
LuaRoot /path/to/a/directory |  | svdh | E
Specify the base path for resolving relative paths for `mod_lua` directives
LuaScope once|request|conn|thread|server [min] [max] | once | svdh | E
One of once, request, conn, thread -- default is once
<Macro name [par1 .. parN]> ... </Macro> |  | svd | B
Define a configuration file macro
MaxConnectionsPerChild number | 0 | s | M
Limit on the number of connections that an individual child server will handle during its life
MaxKeepAliveRequests number | 100 | sv | C
Number of requests allowed on a persistent connection
MaxMemFree KBytes | 2048 | s | M
Maximum amount of memory that the main allocator is allowed to hold without calling `free()`
MaxRangeOverlaps default | unlimited | none | number-of-ranges | 20 | svd | C
Number of overlapping ranges (eg: `100-200,150-300`) allowed before returning the complete resource
MaxRangeReversals default | unlimited | none | number-of-ranges | 20 | svd | C
Number of range reversals (eg: `100-200,50-70`) allowed before returning the complete resource
MaxRanges default | unlimited | none | number-of-ranges | 200 | svd | C
Number of ranges allowed before returning the complete resource
MaxRequestWorkers number |  | s | M
Maximum number of connections that will be processed simultaneously
MaxSpareServers number | 10 | s | M
Maximum number of idle child server processes
MaxSpareThreads number |  | s | M
Maximum number of idle threads
MaxThreads number | 2048 | s | M
Set the maximum number of worker threads
MDActivationDelay duration |  | s | X
How long to delay activation of new certificates
MDBaseServer on|off | off | s | X
Control if base server may be managed or only virtual hosts.
MDCACertificateFile file | none | s | X
File containing x509 trust anchors to verify ACME servers.
MDCAChallenges name [ name ... ] | tls-alpn-01 http-01 + | s | X
Type of ACME challenge used to prove domain ownership.
MDCertificateAgreement accepted |  | s | X
You confirm that you accepted the Terms of Service of the Certificate Authority.
MDCertificateAuthority url | letsencrypt | s | X
The URL(s) of the ACME Certificate Authority to use.
MDCertificateCheck name url |  | s | X
Set name and URL pattern for a certificate monitoring site.
MDCertificateFile path-to-pem-file |  | s | X
Specify a static certificate file for the MD.
MDCertificateKeyFile path-to-file |  | s | X
Specify a static private key for for the static cerrtificate.
MDCertificateMonitor name url | crt.sh https://crt. + | s | X
The URL of a certificate log monitor.
MDCertificateProtocol protocol | ACME | s | X
The protocol to use with the Certificate Authority.
MDCertificateStatus on|off | on | s | X
Exposes public certificate information in JSON.
MDChallengeDns01 path-to-command |  | s | X
Set the command for setup/teardown of dns-01 challenges
MDChallengeDns01Version 1|2 | 1 | s | X
Set the type of arguments to call MDChallengeDns01 with
MDCheckInterval duration | 12h | s | X
Determines how often certificates are checked
MDContactEmail address |  | s | X
Email address used for account registration
MDDriveMode always|auto|manual | auto | s | X
former name of MDRenewMode.
MDExternalAccountBinding key-id hmac-64 | none | file | none | s | X
Set the external account binding keyid and hmac values to use at CA
MDHttpProxy url |  | s | X
Define a proxy for outgoing connections.
MDInitialDelay duration | 0s | s | X
How long to delay the first certificate check.
MDMatchNames all|servernames | all | s | X
Determines how DNS names are matched to vhosts
MDMember hostname |  | s | X
Additional hostname for the managed domain.
MDMembers auto|manual | auto | s | X
Control if the alias domain names are automatically added.
MDMessageCmd path-to-cmd optional-args |  | s | X
Handle events for Manage Domains
MDMustStaple on|off | off | s | X
Control if new certificates carry the OCSP Must Staple flag.
MDNotifyCmd path [ args ] |  | s | X
Run a program when a Managed Domain is ready.
MDomain dns-name [ other-dns-name... ] [auto|manual] |  | s | X
Define list of domain names that belong to one group.
<MDomainSet dns-name [ other-dns-name... ]>...</MDomainSet> |  | s | X
Container for directives applied to the same managed domains.
MDPortMap map1 [ map2 ] | http:80 https:443 | s | X
Map external to internal ports for domain ownership verification.
MDPrivateKeys type [ params... ] | RSA 2048 | s | X
Set type and size of the private keys generated.
MDProfile name |  | s | X
Use a specific ACME profile from the CA
MDProfileMandatory on|off | off | s | X
Control if an MDProfile is mandatory.
MDRenewMode always|auto|manual | auto | s | X
Controls if certificates shall be renewed.
MDRenewViaARI on|off | on | s | X
usage of the ACME ARI extension (rfc9773).
MDRenewWindow duration | 33% | s | X
Control when a certificate will be renewed.
MDRequireHttps off|temporary|permanent | off | s | X
Redirects http: traffic to https: for Managed Domains.
MDRetryDelay duration | 30s | s | X
Time length for first retry, doubled on every consecutive error.
MDRetryFailover number | 13 | s | X
The number of errors before a failover to another CA is triggered
MDServerStatus on|off | on | s | X
Control if Managed Domain information is added to server-status.
MDStapleOthers on|off | on | s | X
Enable stapling for certificates not managed by mod_md.
MDStapling on|off | off | s | X
Enable stapling for all or a particular MDomain.
MDStaplingKeepResponse duration | 7d | s | X
Controls when old responses should be removed.
MDStaplingRenewWindow duration | 33% | s | X
Control when the stapling responses will be renewed.
MDStoreDir path | md | s | X
Path on the local file system to store the Managed Domains data.
MDStoreLocks on|off|duration | off | s | X
Configure locking of store for updates
MDWarnWindow duration | 10% | s | X
Define the time window when you want to be warned about an expiring certificate.
MemcacheConnTTL num[units] | 15s | sv | E
Keepalive time for idle connections
MergeSlashes ON|OFF | ON | sv | C
Controls whether the server merges consecutive slashes in URLs.
MergeTrailers [on|off] | off | sv | C
Determines whether trailers are merged into headers
MetaDir directory | .web | svdh | E
Name of the directory to find CERN-style meta information files
MetaFiles on|off | off | svdh | E
Activates CERN meta-file processing
MetaSuffix suffix | .meta | svdh | E
File name suffix for the file containing CERN-style meta information
MimeMagicFile file-path |  | sv | E
Enable MIME-type determination based on file contents using the specified magic file
MinSpareServers number | 5 | s | M
Minimum number of idle child server processes
MinSpareThreads number |  | s | M
Minimum number of idle threads available to handle request spikes
MMapFile file-path [file-path] ... |  | s | X
Map a list of files into memory at startup time
ModemStandard V.21|V.26bis|V.32|V.34|V.92 |  | d | X
Modem standard to simulate
ModMimeUsePathInfo On|Off | Off | d | B
Tells `mod_mime` to treat `path_info` components as part of the filename
MultiviewsMatch Any|NegotiatedOnly|Filters|Handlers [Handlers|Filters] | NegotiatedOnly | svdh | B
The types of files that will be included when searching for a matching file with MultiViews
Mutex mechanism [default|mutex-name] ... [OmitPID] | default | s | C
Configures mutex mechanism and lock file directory for all or specified mutexes
NameVirtualHost addr[:port] |  | s | C
DEPRECATED: Designates an IP address for name-virtual hosting
NoProxy host [host] ... |  | sv | E
Hosts, domains, or networks that will be connected to directly
NWSSLTrustedCerts filename [filename] ... |  | s | B
List of additional client certificates
NWSSLUpgradeable [IP-address:]portnumber |  | s | B
Allows a connection to be upgraded to an SSL connection upon request
Options [+|-]option [[+|-]option] ... | FollowSymlinks | svdh | C
Configures what features are available in a particular directory
Order ordering | Deny,Allow | dh | E
Controls the default access state and the order in which `Allow` and `Deny` are evaluated.
OutputSed sed-command |  | dh | X
Sed command for filtering response content
PassEnv env-variable [env-variable] ... |  | svdh | B
Passes environment variables from the shell
PidFile filename | logs/httpd.pid | s | M
File where the server records the process ID of the daemon
PrivilegesMode FAST|SECURE|SELECTIVE | FAST | svd | X
Trade off processing speed and efficiency vs security against malicious privileges-aware code.
Protocol protocol |  | sv | C
Protocol for a listening socket
ProtocolEcho On|Off | Off | sv | X
Turn the echo server on or off
Protocols protocol ... | http/1.1 | sv | C
Protocols available for a server/virtual host
ProtocolsHonorOrder On|Off | On | sv | C
Determines if order of Protocols determines precedence during negotiation
<Proxy wildcard-url> ...</Proxy> |  | sv | E
Container for directives applied to proxied resources
Proxy100Continue Off|On | On | svd | E
Forward 100-continue expectation to the origin server
ProxyAddHeaders Off|On | On | svd | E
Add proxy information in X-Forwarded-* headers
ProxyBadHeader IsError|Ignore|StartBody | IsError | sv | E
Determines how to handle bad header lines in a response
ProxyBlock *|word|host|domain [word|host|domain] ... |  | sv | E
Words, hosts, or domains that are banned from being proxied
ProxyDomain Domain |  | sv | E
Default domain name for proxied requests
ProxyErrorOverride Off|On [code ...] | Off | svd | E
Override error pages for proxied content
ProxyExpressDBMFile pathname |  | sv | E
Pathname to DBM file.
ProxyExpressDBMType type | default | sv | E
DBM type of file.
ProxyExpressEnable on|off | off | sv | E
Enable the module functionality.
ProxyFCGIBackendType FPM|GENERIC | FPM | svdh | E
Specify the type of backend FastCGI application
ProxyFCGISetEnvIf conditional-expression [!]environment-variable-name [value-expression] |  | svdh | E
Allow variables sent to FastCGI servers to be fixed up
ProxyFtpDirCharset character_set | ISO-8859-1 | svd | E
Define the character set for proxied FTP listings
ProxyFtpEscapeWildcards on|off | on | svd | E
Whether wildcards in requested filenames are escaped when sent to the FTP server
ProxyFtpListOnWildcard on|off | on | svd | E
Whether wildcards in requested filenames trigger a file listing
ProxyHCExpr name {ap_expr expression} |  | sv | E
Creates a named condition expression to use to determine health of the backend based on its response
ProxyHCTemplate name parameter=setting [...] |  | sv | E
Creates a named template for setting various health check parameters
ProxyHCTPsize size | 16 | s | E
Sets the total server-wide size of the threadpool used for the health check workers
ProxyHTMLBufSize bytes | 8192 | svd | B
Sets the buffer size increment for buffering inline scripts and stylesheets.
ProxyHTMLCharsetOut Charset | * | UTF-8 | svd | B
Specify a charset for mod_proxy_html output.
ProxyHTMLDocType HTML|XHTML [Legacy] OR ProxyHTMLDocType fpi [SGML|XML] |  | svd | B
Sets an HTML or XHTML document type declaration.
ProxyHTMLEnable On|Off | Off | svd | B
Turns the proxy_html filter on or off.
ProxyHTMLEvents attribute [attribute ...] |  | svd | B
Specify attributes to treat as scripting events.
ProxyHTMLExtended On|Off | Off | svd | B
Determines whether to fix links in inline scripts, stylesheets, and scripting events.
ProxyHTMLFixups [lowercase] [dospath] [reset] | none | svd | B
Fixes for simple HTML errors.
ProxyHTMLInterp On|Off | Off | svd | B
Enables per-request interpolation of `ProxyHTMLURLMap` rules.
ProxyHTMLLinks element attribute [attribute2 ...] |  | svd | B
Specify HTML elements that have URL attributes to be rewritten.
ProxyHTMLMeta On|Off | Off | svd | B
Turns on or off extra pre-parsing of metadata in HTML `<head>` sections.
ProxyHTMLStripComments On|Off | Off | svd | B
Determines whether to strip HTML comments.
ProxyHTMLURLMap from-pattern to-pattern [flags] [cond] |  | svd | B
Defines a rule to rewrite HTML links
ProxyIOBufferSize bytes | 8192 | sv | E
Determine size of internal data throughput buffer
<ProxyMatch regex> ...</ProxyMatch> |  | sv | E
Container for directives applied to regular-expression-matched proxied resources
ProxyMaxForwards number | -1 | sv | E
Maximum number of proxies that a request can be forwarded through
ProxyPass [path] !|url [key=value [key=value ...]] [nocanon] [interpolate] [noquery] |  | svd | E
Maps remote servers into the local server URL-space
ProxyPassInherit On|Off | On | sv | E
Inherit ProxyPass directives defined from the main server
ProxyPassInterpolateEnv On|Off | Off | svd | E
Enable Environment Variable interpolation in Reverse Proxy configurations
ProxyPassMatch [regex] !|url [key=value [key=value ...]] |  | svd | E
Maps remote servers into the local server URL-space using regular expressions
ProxyPassReverse [path] url [interpolate] |  | svd | E
Adjusts the URL in HTTP response headers sent from a reverse proxied server
ProxyPassReverseCookieDomain internal-domain public-domain [interpolate] |  | svd | E
Adjusts the Domain string in Set-Cookie headers from a reverse- proxied server
ProxyPassReverseCookiePath internal-path public-path [interpolate] |  | svd | E
Adjusts the Path string in Set-Cookie headers from a reverse- proxied server
ProxyPreserveHost On|Off | Off | svd | E
Use incoming Host HTTP request header for proxy request
ProxyReceiveBufferSize bytes | 0 | sv | E
Network buffer size for proxied HTTP and FTP connections
ProxyRemote match remote-server [username:password] |  | sv | E
Remote proxy used to handle certain requests
ProxyRemoteMatch regex remote-server [username:password] |  | sv | E
Remote proxy used to handle requests matched by regular expressions
ProxyRequests On|Off | Off | sv | E
Enables forward (standard) proxy requests
ProxySCGIInternalRedirect On|Off|Headername | On | svd | E
Enable or disable internal redirect responses from the backend
ProxySCGISendfile On|Off|Headername | Off | svd | E
Enable evaluation of X-Sendfile pseudo response header
ProxySet url key=value [key=value ...] |  | svd | E
Set various Proxy balancer or member parameters
ProxySourceAddress address |  | sv | E
Set local IP address for outgoing proxy connections
ProxyStatus Off|On|Full | Off | sv | E
Show Proxy LoadBalancer status in mod_status
ProxyTimeout seconds |  | sv | E
Network timeout for proxied requests
ProxyVia On|Off|Full|Block | Off | sv | E
Information provided in the `Via` HTTP response header for proxied requests
ProxyWebsocketFallbackToProxyHttp On|Off | On | sv | E
Instructs this module to let `mod_proxy_http` handle the request
QualifyRedirectURL On|Off | Off | svd | C
Controls whether the REDIRECT_URL environment variable is fully qualified
ReadBufferSize bytes | 8192 | svd | C
Size of the buffers used to read data
ReadmeName filename |  | svdh | B
Name of the file that will be inserted at the end of the index listing
ReceiveBufferSize bytes | 0 | s | M
TCP receive buffer size
Redirect [status] [URL-path] URL |  | svdh | B
Sends an external redirect asking the client to fetch a different URL
RedirectMatch [status] regex URL |  | svdh | B
Sends an external redirect based on a regular expression match of the current URL
RedirectPermanent URL-path URL |  | svdh | B
Sends an external permanent redirect asking the client to fetch a different URL
RedirectRelative On|Off | Off | svd | B
Allows relative redirect targets.
RedirectTemp URL-path URL |  | svdh | B
Sends an external temporary redirect asking the client to fetch a different URL
RedisConnPoolTTL num[units] | 15s | sv | E
TTL used for the connection pool with the Redis server(s)
RedisTimeout num[units] | 5s | sv | E
R/W timeout used for the connection with the Redis server(s)
ReflectorHeader inputheader [outputheader] |  | svdh | B
Reflect an input header to the output headers
RegexDefaultOptions [none] [+|-]option [[+|-]option] ... | DOTALL DOLLAR_ENDON + | s | C
Allow to configure global/default options for regexes
RegisterHttpMethod method [method [...]] |  | s | C
Register non-standard HTTP methods
RemoteIPHeader header-field |  | sv | B
Declare the header field which should be parsed for useragent IP addresses
RemoteIPInternalProxy proxy-ip|proxy-ip/subnet|hostname ... |  | sv | B
Declare client intranet IP addresses trusted to present the RemoteIPHeader value
RemoteIPInternalProxyList filename |  | sv | B
Declare client intranet IP addresses trusted to present the RemoteIPHeader value
RemoteIPProxiesHeader HeaderFieldName |  | sv | B
Declare the header field which will record all intermediate IP addresses
RemoteIPProxyProtocol On|Off |  | sv | B
Enable or disable PROXY protocol handling
RemoteIPProxyProtocolExceptions host|range [host|range] [host|range] |  | sv | B
Disable processing of PROXY header for certain hosts or networks
RemoteIPTrustedProxy proxy-ip|proxy-ip/subnet|hostname ... |  | sv | B
Declare client intranet IP addresses trusted to present the RemoteIPHeader value
RemoteIPTrustedProxyList filename |  | sv | B
Declare client intranet IP addresses trusted to present the RemoteIPHeader value
RemoveCharset extension [extension] ... |  | vdh | B
Removes any character set associations for a set of file extensions
RemoveEncoding extension [extension] ... |  | vdh | B
Removes any content encoding associations for a set of file extensions
RemoveHandler extension [extension] ... |  | vdh | B
Removes any handler associations for a set of file extensions
RemoveInputFilter extension [extension] ... |  | vdh | B
Removes any input filter associations for a set of file extensions
RemoveLanguage extension [extension] ... |  | vdh | B
Removes any language associations for a set of file extensions
RemoveOutputFilter extension [extension] ... |  | vdh | B
Removes any output filter associations for a set of file extensions
RemoveType extension [extension] ... |  | vdh | B
Removes any content type associations for a set of file extensions
RequestHeader add|append|edit|edit*|merge|set|setifempty|unset header [[expr=]value [replacement] [early|env=[!]varname|expr=expression]] |  | svdh | E
Configure HTTP request headers
RequestReadTimeout [handshake=timeout[-maxtimeout][,MinRate=rate] [header=timeout[-maxtimeout][,MinRate=rate] [body=timeout[-maxtimeout][,MinRate=rate] | handshake=0 header= + | sv | E
Set timeout values for completing the TLS handshake, receiving the request headers and/or body from client.
Require [not] entity-name [entity-name] ... |  | dh | B
Tests whether an authenticated user is authorized by an authorization provider.
<RequireAll> ... </RequireAll> |  | dh | B
Enclose a group of authorization directives of which none must fail and at least one must succeed for the enclosing directive to succeed.
<RequireAny> ... </RequireAny> |  | dh | B
Enclose a group of authorization directives of which one must succeed for the enclosing directive to succeed.
<RequireNone> ... </RequireNone> |  | dh | B
Enclose a group of authorization directives of which none must succeed for the enclosing directive to not fail.
RewriteBase URL-path |  | dh | E
Sets the base URL for per-directory rewrites
RewriteCond TestString CondPattern [flags] |  | svdh | E
Defines a condition under which rewriting will take place
RewriteEngine on|off | off | svdh | E
Enables or disables runtime rewriting engine
RewriteMap MapName MapType:MapSource [MapTypeOptions] |  | sv | E
Defines a mapping function for key-lookup
RewriteOptions Options |  | svdh | E
Sets some special options for the rewrite engine
RewriteRule Pattern Substitution [flags] |  | svdh | E
Defines rules for the rewriting engine
RLimitCPU seconds|max [seconds|max] |  | svdh | C
Limits the CPU consumption of processes launched by Apache httpd children
RLimitMEM bytes|max [bytes|max] |  | svdh | C
Limits the memory consumption of processes launched by Apache httpd children
RLimitNPROC number|max [number|max] |  | svdh | C
Limits the number of processes that can be launched by processes launched by Apache httpd children
Satisfy Any|All | All | dh | E
Interaction between host-level access control and user authentication
ScoreBoardFile file-path | logs/apache_runtime + | s | M
Location of the file used to store coordination data for the child processes
Script method cgi-script |  | svd | B
Activates a CGI script for a particular request method.
ScriptAlias [URL-path] file-path|directory-path |  | svd | B
Maps a URL to a filesystem location and designates the target as a CGI script
ScriptAliasMatch regex file-path|directory-path |  | sv | B
Maps a URL to a filesystem location using a regular expression and designates the target as a CGI script
ScriptInterpreterSource Registry|Registry-Strict|Script | Script | svdh | C
Technique for locating the interpreter for CGI scripts
ScriptLog file-path |  | sv | B
Location of the CGI script error logfile
ScriptLogBuffer bytes | 1024 | sv | B
Maximum amount of PUT or POST requests that will be recorded in the scriptlog
ScriptLogLength bytes | 10385760 | sv | B
Size limit of the CGI script logfile
ScriptSock file-path | cgisock | s | B
The filename prefix of the socket to use for communication with the cgi daemon
SecureListen [IP-address:]portnumber Certificate-Name [MUTUAL] |  | s | B
Enables SSL encryption for the specified port
SeeRequestTail On|Off | Off | s | C
Determine if mod_status displays the first 63 characters of a request or the last 63, assuming the request itself is greater than 63 chars.
SendBufferSize bytes | 0 | s | M
TCP buffer size
ServerAdmin email-address|URL |  | sv | C
Email address that the server includes in error messages sent to the client
ServerAlias hostname [hostname] ... |  | v | C
Alternate names for a host used when matching requests to name-virtual hosts
ServerLimit number |  | s | M
Upper limit on configurable number of processes
ServerName [scheme://]domain-name|ip-address[:port] |  | sv | C
Hostname and port that the server uses to identify itself
ServerPath URL-path |  | v | C
Legacy URL pathname for a name-based virtual host that is accessed by an incompatible browser
ServerRoot directory-path | /usr/local/apache | s | C
Base directory for the server installation
ServerSignature On|Off|EMail | Off | svdh | C
Configures the footer on server-generated documents
ServerTokens Major|Minor|Min[imal]|Prod[uctOnly]|OS|Full | Full | s | C
Configures the `Server` HTTP response header
Session On|Off | Off | svdh | E
Enables a session for the current directory or location
SessionCookieName name attributes |  | svdh | E
Name and attributes for the RFC2109 cookie storing the session
SessionCookieName2 name attributes |  | svdh | E
Name and attributes for the RFC2965 cookie storing the session
SessionCookieRemove On|Off | Off | svdh | E
Control for whether session cookies should be removed from incoming HTTP headers
SessionCryptoCipher name | aes256 | svdh | X
The crypto cipher to be used to encrypt the session
SessionCryptoDriver name [param[=value]] |  | s | X
The crypto driver to be used to encrypt the session
SessionCryptoPassphrase secret [ secret ... ] |  | svdh | X
The key used to encrypt the session
SessionCryptoPassphraseFile filename |  | svd | X
File containing keys used to encrypt the session
SessionDBDCookieName name attributes |  | svdh | E
Name and attributes for the RFC2109 cookie storing the session ID
SessionDBDCookieName2 name attributes |  | svdh | E
Name and attributes for the RFC2965 cookie storing the session ID
SessionDBDCookieRemove On|Off | On | svdh | E
Control for whether session ID cookies should be removed from incoming HTTP headers
SessionDBDDeleteLabel label | deletesession | svdh | E
The SQL query to use to remove sessions from the database
SessionDBDInsertLabel label | insertsession | svdh | E
The SQL query to use to insert sessions into the database
SessionDBDPerUser On|Off | Off | svdh | E
Enable a per user session
SessionDBDSelectLabel label | selectsession | svdh | E
The SQL query to use to select sessions from the database
SessionDBDUpdateLabel label | updatesession | svdh | E
The SQL query to use to update existing sessions in the database
SessionEnv On|Off | Off | svdh | E
Control whether the contents of the session are written to the HTTP_SESSION environment variable
SessionExclude path |  | svdh | E
Define URL prefixes for which a session is ignored
SessionExpiryUpdateInterval interval | 0 (always update) | svdh | E
Define the number of seconds a session's expiry may change without the session being updated
SessionHeader header |  | svdh | E
Import session updates from a given HTTP response header
SessionInclude path |  | svdh | E
Define URL prefixes for which a session is valid
SessionMaxAge maxage | 0 | svdh | E
Define a maximum age in seconds for a session
SetEnv env-variable [value] |  | svdh | B
Sets environment variables
SetEnvIf attribute regex [!]env-variable[=value] [[!]env-variable[=value]] ... |  | svdh | B
Sets environment variables based on attributes of the request
SetEnvIfExpr expr [!]env-variable[=value] [[!]env-variable[=value]] ... |  | svdh | B
Sets environment variables based on an ap_expr expression
SetEnvIfNoCase attribute regex [!]env-variable[=value] [[!]env-variable[=value]] ... |  | svdh | B
Sets environment variables based on attributes of the request without respect to case
SetHandler handler-name|none|expression |  | svdh | C
Forces all matching files to be processed by a handler
SetInputFilter filter[;filter...] |  | svdh | C
Sets the filters that will process client requests and POST input
SetOutputFilter filter[;filter...] |  | svdh | C
Sets the filters that will process responses from the server
SSIEndTag tag | "-->" | sv | B
String that ends an include element
SSIErrorMsg message | "[an error occurred + | svdh | B
Error message displayed when there is an SSI error
SSIETag on|off | off | dh | B
Controls whether ETags are generated by the server.
SSILastModified on|off | off | dh | B
Controls whether `Last-Modified` headers are generated by the server.
SSILegacyExprParser on|off | off | dh | B
Enable compatibility mode for conditional expressions.
SSIStartTag tag | "<!--#" | sv | B
String that starts an include element
SSITimeFormat formatstring | "%A, %d-%b-%Y %H:%M + | svdh | B
Configures the format in which date strings are displayed
SSIUndefinedEcho string | "(none)" | svdh | B
String displayed when an unset variable is echoed
SSLCACertificateFile file-path |  | sv | E
File of concatenated PEM-encoded CA Certificates for Client Auth
SSLCACertificatePath directory-path |  | sv | E
Directory of PEM-encoded CA Certificates for Client Auth
SSLCADNRequestFile file-path |  | sv | E
File of concatenated PEM-encoded CA Certificates for defining acceptable CA names
SSLCADNRequestPath directory-path |  | sv | E
Directory of PEM-encoded CA Certificates for defining acceptable CA names
SSLCARevocationCheck chain|leaf|none [flags ...] | none | sv | E
Enable CRL-based revocation checking
SSLCARevocationFile file-path |  | sv | E
File of concatenated PEM-encoded CA CRLs for Client Auth
SSLCARevocationPath directory-path |  | sv | E
Directory of PEM-encoded CA CRLs for Client Auth
SSLCertificateChainFile file-path |  | sv | E
File of PEM-encoded Server CA Certificates
SSLCertificateFile file-path|certid |  | sv | E
Server PEM-encoded X.509 certificate data file or token identifier
SSLCertificateKeyFile file-path|keyid |  | sv | E
Server PEM-encoded private key file
SSLCipherSuite [protocol] cipher-spec | DEFAULT (depends on + | svdh | E
Cipher Suite available for negotiation in SSL handshake
SSLCompression on|off | off | sv | E
Enable compression on the SSL level
SSLCryptoDevice engine | builtin | s | E
Enable use of a cryptographic hardware accelerator
SSLEngine on|off | off | sv | E
SSL Engine Operation Switch
SSLFIPS on|off | off | s | E
SSL FIPS mode Switch
SSLHonorCipherOrder on|off | off | sv | E
Option to prefer the server's cipher preference order
SSLInsecureRenegotiation on|off | off | sv | E
Option to enable support for insecure renegotiation
SSLOCSPDefaultResponder uri |  | sv | E
Set the default responder URI for OCSP validation
SSLOCSPEnable on|leaf|off [flags] | off | sv | E
Enable OCSP validation of the client certificate chain
SSLOCSPNoverify on|off | off | sv | E
skip the OCSP responder certificates verification
SSLOCSPOverrideResponder on|off | off | sv | E
Force use of the default responder URI for OCSP validation
SSLOCSPProxyURL url |  | sv | E
Proxy URL to use for OCSP requests
SSLOCSPResponderCertificateFile file |  | sv | E
Set of trusted PEM encoded OCSP responder certificates
SSLOCSPResponderTimeout seconds | 10 | sv | E
Timeout for OCSP queries
SSLOCSPResponseMaxAge seconds | -1 | sv | E
Maximum allowable age for OCSP responses
SSLOCSPResponseTimeSkew seconds | 300 | sv | E
Maximum allowable time skew for OCSP response validation
SSLOCSPUseRequestNonce on|off | on | sv | E
Use a nonce within OCSP queries
SSLOpenSSLConfCmd command-name command-value |  | sv | E
Configure OpenSSL parameters through its SSL_CONF API
SSLOptions [+|-]option ... |  | svdh | E
Configure various SSL engine run-time options
SSLPassPhraseDialog type | builtin | s | E
Type of pass phrase dialog for encrypted private keys
SSLProtocol [+|-]protocol ... | all -SSLv3 (up to 2 + | sv | E
Configure usable SSL/TLS protocol versions
SSLProxyCACertificateFile file-path |  | svp | E
File of concatenated PEM-encoded CA Certificates for Remote Server Auth
SSLProxyCACertificatePath directory-path |  | svp | E
Directory of PEM-encoded CA Certificates for Remote Server Auth
SSLProxyCARevocationCheck chain|leaf|none | none | svp | E
Enable CRL-based revocation checking for Remote Server Auth
SSLProxyCARevocationFile file-path |  | svp | E
File of concatenated PEM-encoded CA CRLs for Remote Server Auth
SSLProxyCARevocationPath directory-path |  | svp | E
Directory of PEM-encoded CA CRLs for Remote Server Auth
SSLProxyCheckPeerCN on|off | on | svp | E
Whether to check the remote server certificate's CN field
SSLProxyCheckPeerExpire on|off | on | svp | E
Whether to check if remote server certificate is expired
SSLProxyCheckPeerName on|off | on | svp | E
Configure host name checking for remote server certificates
SSLProxyCipherSuite [protocol] cipher-spec | ALL:!ADH:RC4+RSA:+H + | svp | E
Cipher Suite available for negotiation in SSL proxy handshake
SSLProxyEngine on|off | off | svp | E
SSL Proxy Engine Operation Switch
SSLProxyMachineCertificateChainFile filename |  | svp | E
File of concatenated PEM-encoded CA certificates to be used by the proxy for choosing a certificate
SSLProxyMachineCertificateFile filename |  | svp | E
File of concatenated PEM-encoded client certificates and keys to be used by the proxy
SSLProxyMachineCertificatePath directory |  | svp | E
Directory of PEM-encoded client certificates and keys to be used by the proxy
SSLProxyProtocol [+|-]protocol ... | all -SSLv3 (up to 2 + | svp | E
Configure usable SSL protocol flavors for proxy usage
SSLProxyVerify level | none | svp | E
Type of remote server Certificate verification
SSLProxyVerifyDepth number | 1 | svp | E
Maximum depth of CA Certificates in Remote Server Certificate verification
SSLRandomSeed context source [bytes] |  | s | E
Pseudo Random Number Generator (PRNG) seeding source
SSLRenegBufferSize bytes | 131072 | dh | E
Set the size for the SSL renegotiation buffer
SSLRequire expression |  | dh | E
Allow access only when an arbitrarily complex boolean expression is true
SSLRequireSSL |  | dh | E
Deny access when SSL is not used for the HTTP request
SSLSessionCache type | none | s | E
Type of the global/inter-process SSL Session Cache
SSLSessionCacheTimeout seconds | 300 | sv | E
Number of seconds before an SSL session expires in the Session Cache
SSLSessionTicketKeyFile file-path |  | sv | E
Persistent encryption/decryption key for TLS session tickets
SSLSessionTickets on|off | on | sv | E
Enable or disable use of TLS session tickets
SSLSRPUnknownUserSeed secret-string |  | sv | E
SRP unknown user seed
SSLSRPVerifierFile file-path |  | sv | E
Path to SRP verifier file
SSLStaplingCache type |  | s | E
Configures the OCSP stapling cache
SSLStaplingErrorCacheTimeout seconds | 600 | sv | E
Number of seconds before expiring invalid responses in the OCSP stapling cache
SSLStaplingFakeTryLater on|off | on | sv | E
Synthesize "tryLater" responses for failed OCSP stapling queries
SSLStaplingForceURL uri |  | sv | E
Override the OCSP responder URI specified in the certificate's AIA extension
SSLStaplingResponderTimeout seconds | 10 | sv | E
Timeout for OCSP stapling queries
SSLStaplingResponseMaxAge seconds | -1 | sv | E
Maximum allowable age for OCSP stapling responses
SSLStaplingResponseTimeSkew seconds | 300 | sv | E
Maximum allowable time skew for OCSP stapling response validation
SSLStaplingReturnResponderErrors on|off | on | sv | E
Pass stapling related OCSP errors on to client
SSLStaplingStandardCacheTimeout seconds | 3600 | sv | E
Number of seconds before expiring responses in the OCSP stapling cache
SSLStrictSNIVHostCheck on|off | off | sv | E
Whether to allow non-SNI clients to access a name-based virtual host.
SSLUserName varname |  | sdh | E
Variable name to determine user name
SSLUseStapling on|off | off | sv | E
Enable stapling of OCSP responses in the TLS handshake
SSLVerifyClient level | none | svdh | E
Type of Client Certificate verification
SSLVerifyDepth number | 1 | svdh | E
Maximum depth of CA Certificates in Client Certificate verification
SSLVHostSNIPolicy strict|secure|authonly|insecure | secure | s | E
Set compatibility policy for SNI client access to virtual hosts.
StartServers number |  | s | M
Number of child server processes created at startup
StartThreads number |  | s | M
Number of threads created on startup
StrictHostCheck ON|OFF | OFF | sv | C
Controls whether the server requires the requested hostname be listed enumerated in the virtual host handling the request
Substitute s/pattern/substitution/[infq] |  | dh | E
Pattern to filter the response content
SubstituteInheritBefore on|off | off | dh | E
Change the merge order of inherited patterns
SubstituteMaxLineLength bytes(b|B|k|K|m|M|g|G) | 1m | dh | E
Set the maximum line size
Suexec On|Off |  | s | B
Enable or disable the suEXEC feature
SuexecUserGroup User Group |  | sv | E
User and group for CGI programs to run as
ThreadLimit number |  | s | M
Sets the upper limit on the configurable number of threads per child process
ThreadsPerChild number |  | s | M
Number of threads created by each child process
ThreadStackSize size |  | s | M
The size in bytes of the stack used by threads handling client connections
TimeOut seconds | 60 | sv | C
Amount of time the server will wait for certain events before failing a request
TraceEnable [on|off|extended] | on | sv | C
Determines the behavior on `TRACE` requests
TransferLog file|pipe |  | sv | B
Specify location of a log file
TypesConfig file-path | conf/mime.types | s | B
The location of the `mime.types` file
UNCList hostname [hostname...] |  | s | C
Controls what UNC host names can be accessed by the server
UnDefine parameter-name |  | s | C
Undefine the existence of a variable
UndefMacro name |  | svd | B
Undefine a macro
UnsetEnv env-variable [env-variable] ... |  | svdh | B
Removes variables from the environment
Use name [value1 ... valueN] |  | svd | B
Use a macro
UseCanonicalName On|Off|DNS | Off | svd | C
Configures how the server determines its own name and port
UseCanonicalPhysicalPort On|Off | Off | svd | C
Configures how the server determines its own port
User unix-userid | #-1 | s | B
The userid under which the server will answer requests
UserDir directory-filename [directory-filename] ... |  | sv | B
Location of the user-specific directories
VHostCGIMode On|Off|Secure | On | v | X
Determines whether the virtualhost can run subprocesses, and the privileges available to subprocesses.
VHostCGIPrivs [+-]?privilege-name [[+-]?privilege-name] ... |  | v | X
Assign arbitrary privileges to subprocesses created by a virtual host.
VHostGroup unix-groupid |  | v | X
Sets the Group ID under which a virtual host runs.
VHostPrivs [+-]?privilege-name [[+-]?privilege-name] ... |  | v | X
Assign arbitrary privileges to a virtual host.
VHostSecure On|Off | On | v | X
Determines whether the server runs with enhanced security for the virtualhost.
VHostUser unix-userid |  | v | X
Sets the User ID under which a virtual host runs.
VirtualDocumentRoot interpolated-directory|none | none | sv | E
Dynamically configure the location of the document root for a given virtual host
VirtualDocumentRootIP interpolated-directory|none | none | sv | E
Dynamically configure the location of the document root for a given virtual host
<VirtualHost addr[:port] [addr[:port]] ...> ... </VirtualHost> |  | s | C
Contains directives that apply only to a specific hostname or IP address
VirtualScriptAlias interpolated-directory|none | none | sv | E
Dynamically configure the location of the CGI directory for a given virtual host
VirtualScriptAliasIP interpolated-directory|none | none | sv | E
Dynamically configure the location of the CGI directory for a given virtual host
WatchdogInterval time-interval[s] | 1 | s | B
Watchdog interval in seconds
XBitHack on|off|full | off | svdh | B
Parse SSI directives in files with the execute bit set
xml2EncAlias charset alias [alias ...] |  | s | B
Recognise Aliases for encoding values
xml2EncDefault name |  | svdh | B
Sets a default encoding to assume when absolutely no information can be automatically detected
xml2StartParse element [element ...] |  | svdh | B
Advise the parser to skip leading junk.