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Apache > HTTP Server > Documentation > Version 2.3 > 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 columns shows the default value of the directive, if a default exists. If the default is too large to display, the first characters will be 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  |  R  |  S  |  T  |  U  |  V  |  W  |  X 
s server config
v virtual host
d directory
h .htaccess
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
AcceptMutex Default|method Default s M
Method that Apache uses to serialize multiple children accepting requests on network 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 MIME-enc 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 MIME-lang 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...] MIME-type [MIME-type] ... svdh C
assigns an output filter to a particular MIME-type
AddType MIME-type extension [extension] ... svdh B
Maps the given filename extensions onto the specified content type
Alias URL-path file-path|directory-path sv B
Maps URLs to filesystem locations
AliasMatch regex file-path|directory-path sv B
Maps URLs to filesystem locations using regular expressions
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] ... 443 563 sv E
Ports that are allowed to CONNECT through the proxy
AllowEncodedSlashes On|Off Off sv C
Determines whether encoded path separators in URLs are allowed to be passed through
AllowOverride All|None|directive-type [directive-type] ... All d C
Types of 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
AssignUserID user-id group-id v M
Tie a virtual host to a user and group ID
AuthBasicAuthoritative On|Off On dh B
Sets whether authorization and authentication are passed to lower level modules
AuthBasicProvider provider-name [provider-name] ... file dh B
Sets the authentication provider(s) for this location
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
AuthDefaultAuthoritative On|Off On dh B
Sets whether authentication is passed to lower level modules
AuthDigestAlgorithm MD5|MD5-sess MD5 dh X
Selects the algorithm used to calculate the challenge and response hashes in digest authentication
AuthDigestDomain URI [URI] ... dh X
URIs that are in the same protection space for digest authentication
AuthDigestNcCheck On|Off Off s X
Enables or disables checking of the nonce-count sent by the server
AuthDigestNonceFormat format dh X
Determines how the nonce is generated
AuthDigestNonceLifetime seconds 300 dh X
How long the server nonce is valid
AuthDigestProvider provider-name [provider-name] ... file dh X
Sets the authentication provider(s) for this location
AuthDigestQop none|auth|auth-int [auth|auth-int] auth dh X
Determines the quality-of-protection to use in digest authentication
AuthDigestShmemSize size 1000 s X
The amount of shared memory to allocate for keeping track of clients
AuthGroupFile file-path dh B
Sets the name of a text file containing the list of user groups for authorization
AuthLDAPBindDN distinguished-name dh E
Optional DN to use in binding to the LDAP server
AuthLDAPBindPassword password dh E
Password used in conjuction with the bind DN
AuthLDAPCharsetConfig file-path s E
Language to charset conversion configuration file
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 dh E
LDAP attributes used to check for group membership
AuthLDAPGroupAttributeIsDN on|off on dh E
Use the DN of the client username when checking for group membership
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
AuthLDAPUrl url [NONE|SSL|TLS|STARTTLS] dh E
URL specifying the LDAP search parameters
AuthName auth-domain dh B
Authorization realm for use in HTTP authentication
<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
AuthType Basic|Digest 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 SQL-Query d E
Specify the SQL Query for the required operation
AuthzDBDRedirectQuery SQL-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
AuthzDefaultAuthoritative On|Off On dh B
Sets whether authorization is passed to lower level modules
AuthMergeRules on | off dh B
Set to 'on' to allow the parent's <Directory> or <Location> authz rules to be merged into the current <Directory> or <Location>. Set to 'off' to disable merging. If set to 'off', only the authz rules defined in the current <Directory> or <Location> block will apply.
BalancerMember url [key=value [key=value ...]] d E
Add a member to a load balancing group
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
CacheDefaultExpire seconds 3600 (one hour) sv E
The default duration to cache a document when no expiry date is specified.
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 sv E
Disable caching of specified URLs
CacheEnable cache_type url-string sv 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
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 sv E
Ignore the fact that a response has no Last Modified header.
CacheIgnoreQueryString On|Off Off sv E
Ignore query string when caching
CacheLastModifiedFactor float 0.1 sv E
The factor used to compute an expiry date based on the LastModified date.
CacheMaxExpire seconds 86400 (one day) sv E
The maximum time in seconds to cache a document
CacheMaxFileSize bytes 1000000 sv E
The maximum size (in bytes) of a document to be placed in the cache
CacheMinExpire seconds 0 sv E
The minimum time in seconds to cache a document
CacheMinFileSize bytes 1 sv 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
CacheRoot directory sv E
The directory root under which cache files are stored
CacheStoreNoStore On|Off Off sv E
Attempt to cache requests or responses that have been marked as no-store.
CacheStorePrivate On|Off Off sv E
Attempt to cache responses that the server has marked as private
CGIMapExtension cgi-path .extension dh C
Technique for locating the interpreter for CGI scripts
CharsetDefault charset svdh X
Charset to translate into
CharsetOptions option [option] ... DebugLevel=0 NoImpl + svdh X
Configures charset translation behavior
CharsetSourceEnc charset svdh X
Source charset of files
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
ChildPerUserID user-id group-id num-children s M
Specify user ID and group ID for a number of child processes
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
CookieLog filename sv B
Sets filename for the logging of cookies
CookieName token Apache svdh E
Name of the tracking 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 attempts to switch before dumping core
CustomLog file|pipe format|nickname [env=[!]environment-variable] sv B
Sets filename and format of log file
Dav On|Off|provider-name Off d E
Enable WebDAV HTTP methods
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
DavMinTimeout seconds 0 svd E
Minimum amount of time the server holds a lock on a DAV resource
DBDExptime time-in-seconds sv E
Keepalive time for idle connections
DBDKeep number sv E
Maximum sustained number of connections
DBDMax number sv E
Maximum number of connections
DBDMin number 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 MIME-lang svdh B
Sets all files in the given scope to the specified language
DefaultType MIME-type text/plain svdh C
MIME content-type that will be sent if the server cannot determine a type in any other way
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
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 and sub-directories
DirectoryIndex local-url [local-url] ... index.html svdh B
List of resources to look for when the client requests a directory
<DirectoryMatch regex> ... </DirectoryMatch> sv C
Enclose directives that apply to file-system directories matching a regular expression and their subdirectories
DirectorySlash On|Off On svdh B
Toggle trailing slash redirects on or off
DocumentRoot directory-path /usr/local/apache/h + sv C
Directory that forms the main document tree visible from the web
DumpIOInput On|Off Off s E
Dump all input data to the error log
DumpIOLogLevel level debug s E
Controls the logging level of the DumpIO output
DumpIOOutput On|Off Off s E
Dump all output data to the error log
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 On svdh C
Use the kernel sendfile support to deliver files to the client
ErrorDocument error-code document svdh C
What the server will return to the client in case of an error
ErrorLog file-path|syslog[:facility] logs/error_log (Uni + sv C
Location where the server will log errors
Example svdh X
Demonstration directive to illustrate the Apache module API
ExpiresActive On|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 B
Keep track of extended status information for each request
ExtFilterDefine filtername parameters s E
Define an external filter
ExtFilterOptions option [option] ... DebugLevel=0 NoLogS + d E
Configure mod_ext_filter options
FileETag component ... INode MTime Size svdh C
File attributes used to create the ETag HTTP response header
<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 [req|resp|env]=dispatch match svdh B
Register a content filter
FilterTrace filter-name level svd B
Get debug/diagnostic information from mod_filter
ForceLanguagePriority None|Prefer|Fallback [Prefer|Fallback] Prefer svdh B
Action to take if a single acceptable document is not found
ForceType MIME-type|None dh C
Forces all matching files to be served with the specified MIME content-type
ForensicLog filename|pipe sv E
Sets filename of the forensic log
GracefulShutDownTimeout seconds s M
Specify a timeout after which a gracefully shutdown server will exit.
Group unix-group #-1 s M
Group under which the server will answer requests
Header [condition] set|append|merge|add|unset|echo|edit header [value] [early|env=[!]variable] 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
HostnameLookups On|Off|Double Off svd C
Enables DNS lookups on client IP addresses
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
<IfDefine [!]parameter-name> ... </IfDefine> svdh C
Encloses directives that will be processed only if a test is true 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
<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 svdh B
Action if no coordinates are given when calling an imagemap
Include file-path|directory-path svd C
Includes other configuration files from within the server configuration files
IndexIgnore file [file] ... svdh B
Adds to 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
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 seconds 5 sv C
Amount of time the server will wait for subsequent requests on a persistent connection
LanguagePriority MIME-lang [MIME-lang] ... svdh B
The precendence 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
LDAPConnectionTimeout seconds s E
Specifies the socket connection timeout in seconds
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
LDAPSharedCacheFile directory-path/filename s E
Sets the shared memory cache file
LDAPSharedCacheSize bytes 102400 s E
Size in bytes of the shared-memory cache
LDAPTrustedClientCert type directory-path/filename/nickname [password] svdh 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> svdh C
Restrict enclosed access controls to only certain HTTP methods
<LimitExcept method [method] ... > ... </LimitExcept> svdh 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 0 svdh C
Restricts the total size of the HTTP request body sent from the client
LimitRequestFields number 100 s C
Limits the number of HTTP request header fields that will be accepted from the client
LimitRequestFieldSize bytes 8190 s C
Limits the size of the HTTP request header allowed from the client
LimitRequestLine bytes 8190 s 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 s M
Maximum length of the queue of pending connections
LoadFile filename [filename] ... s E
Link in the named object file or library
LoadModule module filename s 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
LockFile filename logs/accept.lock s M
Location of the accept serialization lock file (deprecated)
LogFormat format|nickname [nickname] "%h %l %u %t \"%r\" + sv B
Describes a format for use in a log file
LogLevel level warn sv C
Controls the verbosity of the ErrorLog
MaxClients number s M
Maximum number of child processes that will be created to serve requests
MaxKeepAliveRequests number 100 sv C
Number of requests allowed on a persistent connection
MaxMemFree KBytes 0 s M
Maximum amount of memory that the main allocator is allowed to hold without calling free()
MaxRequestsPerChild number 10000 s M
Limit on the number of requests that an individual child server will handle during its life
MaxRequestsPerThread number 0 s M
Limit on the number of requests that an individual thread will handle during its life
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
MaxThreadsPerChild number 64 s M
Maximum number of threads per child process
MCacheMaxObjectCount value 1009 s E
The maximum number of objects allowed to be placed in the cache
MCacheMaxObjectSize bytes 10000 s E
The maximum size (in bytes) of a document allowed in the cache
MCacheMaxStreamingBuffer size_in_bytes the smaller of 1000 + s E
Maximum amount of a streamed response to buffer in memory before declaring the response uncacheable
MCacheMinObjectSize bytes 1 s E
The minimum size (in bytes) of a document to be allowed in the cache
MCacheRemovalAlgorithm LRU|GDSF GDSF s E
The algorithm used to select documents for removal from the cache
MCacheSize KBytes 100 s E
The maximum amount of memory used by the cache in KBytes
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 containg 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
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
NameVirtualHost addr[:port] s C
Designates an IP address for name-virtual hosting
NoProxy host [host] ... sv E
Hosts, domains, or networks that will be connected to directly
NumServers number 2 s M
Total number of children alive at the same time
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] ... All 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.
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
ProtocolEcho On|Off sv X
Turn the echo server on or off
<Proxy wildcard-url> ...</Proxy> sv E
Container for directives applied to proxied resources
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 On|Off Off sv E
Override error pages for proxied content
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 10 sv E
Maximium number of proxies that a request can be forwarded through
ProxyPass [path] !|url [key=value [key=value ...]] svd E
Maps remote servers into the local server URL-space
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 svd E
Adjusts the URL in HTTP response headers sent from a reverse proxied server
ProxyPassReverseCookieDomain internal-domain public-domain svd E
Adjusts the Domain string in Set-Cookie headers from a reverse- proxied server
ProxyPassReverseCookiePath internal-path public-path svd E
Adjusts the Path string in Set-Cookie headers from a reverse- proxied server
ProxyPreserveHost On|Off Off sv 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 sv E
Remote proxy used to handle certain requests
ProxyRemoteMatch regex remote-server sv E
Remote proxy used to handle requests matched by regular expressions
ProxyRequests On|Off Off sv E
Enables forward (standard) proxy requests
ProxySet url key=value [key=value ...] d E
Set various Proxy balancer or member parameters
ProxyStatus Off|On|Full Off sv E
Show Proxy LoadBalancer status in mod_status
ProxyTimeout seconds 300 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
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
RedirectTemp URL-path URL svdh B
Sends an external temporary redirect asking the client to fetch a different URL
Reject entity-name [entity-name] ... dh B
Rejects authenticated users or host based requests from accessing a resource
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 set|append|merge|add|unset|edit header [value] [replacement] [early|env=[!]variable] svdh E
Configure HTTP request headers
Require entity-name [entity-name] ... dh B
Selects which authenticated users can access a resource
RewriteBase URL-path dh E
Sets the base URL for per-directory rewrites
RewriteCond TestString CondPattern svdh E
Defines a condition under which rewriting will take place
RewriteEngine on|off off svdh E
Enables or disables runtime rewriting engine
RewriteLock file-path s E
Sets the name of the lock file used for RewriteMap synchronization
RewriteLog file-path sv E
Sets the name of the file used for logging rewrite engine processing
RewriteLogLevel Level 0 sv E
Sets the verbosity of the log file used by the rewrite engine
RewriteMap MapName MapType:MapSource 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 children
RLimitMEM bytes|max [bytes|max] svdh C
Limits the memory consumption of processes launched by Apache children
RLimitNPROC number|max [number|max] svdh C
Limits the number of processes that can be launched by processes launched by Apache children
Satisfy Any|All All dh E
Interaction between host-level access control and user authentication
<SatisfyAll> ... </SatisfyAll> dh B
Enclose a group of authorization directives that must all be satisfied in order to grant access to a resource. This block allows for 'AND' logic to be applied to various authorization providers.
<SatisfyOne> ... </SatisfyOne> dh B
Enclose a group of authorization directives that must satisfy at least one in order to grant access to a resource. This block allows for 'OR' logic to be applied to various authorization providers.
ScoreBoardFile file-path logs/apache_status 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 sv 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 logs/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
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://]fully-qualified-domain-name[: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
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
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 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
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
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 sv E
Server PEM-encoded X.509 Certificate file
SSLCertificateKeyFile file-path sv E
Server PEM-encoded Private Key file
SSLCipherSuite cipher-spec ALL:!ADH:RC4+RSA:+H + svdh E
Cipher Suite available for negotiation in SSL handshake
SSLCryptoDevice engine builtin s E
Enable use of a cryptographic hardware accelerator
SSLEngine on|off|optional off sv E
SSL Engine Operation Switch
SSLHonorCiperOrder flag sv E
Option to prefer the server's cipher preference order
SSLMutex type none s E
Semaphore for internal mutual exclusion of operations
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 sv E
Configure usable SSL protocol versions
SSLProxyCACertificateFile file-path sv E
File of concatenated PEM-encoded CA Certificates for Remote Server Auth
SSLProxyCACertificatePath directory-path sv E
Directory of PEM-encoded CA Certificates for Remote Server Auth
SSLProxyCARevocationFile file-path sv E
File of concatenated PEM-encoded CA CRLs for Remote Server Auth
SSLProxyCARevocationPath directory-path sv E
Directory of PEM-encoded CA CRLs for Remote Server Auth
SSLProxyCipherSuite cipher-spec ALL:!ADH:RC4+RSA:+H + svdh E
Cipher Suite available for negotiation in SSL proxy handshake
SSLProxyEngine on|off off sv E
SSL Proxy Engine Operation Switch
SSLProxyMachineCertificateFile filename s E
File of concatenated PEM-encoded client certificates and keys to be used by the proxy
SSLProxyMachineCertificatePath directory s E
Directory of PEM-encoded client certificates and keys to be used by the proxy
SSLProxyProtocol [+|-]protocol ... all sv E
Configure usable SSL protocol flavors for proxy usage
SSLProxyVerify level none svdh E
Type of remote server Certificate verification
SSLProxyVerifyDepth number 1 svdh E
Maximum depth of CA Certificates in Remote Server Certificate verification
SSLRandomSeed context source [bytes] s E
Pseudo Random Number Generator (PRNG) seeding source
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
SSLUserName varname sdh E
Variable name to determine user name
SSLVerifyClient level none svdh E
Type of Client Certificate verification
SSLVerifyDepth number 1 svdh E
Maximum depth of CA Certificates in Client Certificate verification
StartServers number s M
Number of child server processes created at startup
StartThreads number s M
Number of threads created on startup
SuexecUserGroup User Group sv E
User and group permissions for CGI programs
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 300 sv C
Amount of time the server will wait for certain events before failing a request
TraceEnable [on|off|extended] on s C
Determines the behaviour 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
UnsetEnv env-variable [env-variable] ... svdh B
Removes variables from the environment
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 name and port
User unix-userid #-1 s M
The userid under which the server will answer requests
UserDir directory-filename sv B
Location of the user-specific directories
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
Win32DisableAcceptEx s M
Use accept() rather than AcceptEx() to accept network connections
XBitHack on|off|full off svdh B
Parse SSI directives in files with the execute bit set