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<title>mod_authz_dbm - Apache HTTP Server Version 2.4</title>
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Modules | Directives | FAQ | Glossary | Sitemap
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Apache HTTP Server Version 2.4
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Apache > HTTP Server > Documentation > Version 2.4 > Modules
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Apache Module mod_authz_dbm
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Available Languages: en |
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fr |
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ko
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Status:Extension
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Module Identifier:authz_dbm_module
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Source File:mod_authz_dbm.c
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Compatibility:Available in Apache 2.1 and later
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Summary
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This module provides authorization capabilities so that
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authenticated users can be allowed or denied access to portions
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of the web site by group membership. Similar functionality is
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provided by mod_authz_groupfile.
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![Support Apache!]() Topics
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 The Require Directives
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Example usage
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Directives
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AuthDBMGroupFile
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AuthzDBMType
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Bugfix checklistSee also
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Require
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Comments
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Apache's Require
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directives are used during the authorization phase to ensure that
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a user is allowed to access a resource. mod_authz_dbm extends the
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authorization types with dbm-group.
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Since v2.4.8, expressions are supported
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within the DBM require directives.
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This directive specifies group membership that is required for the
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user to gain access.
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Require dbm-group admin
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When this directive is specified, the user must be a member of the group
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assigned to the file being accessed.
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Require dbm-file-group
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Note that using mod_authz_dbm requires you to require dbm-group
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instead of group:
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<Directory "/foo/bar">
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AuthType Basic
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AuthName "Secure Area"
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AuthBasicProvider dbm
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AuthDBMUserFile "site/data/users"
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AuthDBMGroupFile "site/data/users"
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Require dbm-group admin
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</Directory>
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Description:Sets the name of the database file containing the list
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of user groups for authorization
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Syntax:AuthDBMGroupFile file-path
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Context:directory, .htaccess
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Override:AuthConfig
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Status:Extension
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Module:mod_authz_dbm
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The AuthDBMGroupFile directive sets the
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name of a DBM file containing the list of user groups for user
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authorization. File-path is the absolute path to the
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group file.
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The group file is keyed on the username. The value for a
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user is a comma-separated list of the groups to which the users
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belongs. There must be no whitespace within the value, and it
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must never contain any colons.
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Security
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Make sure that the AuthDBMGroupFile is
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stored outside the document tree of the web-server. Do
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not put it in the directory that it protects.
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Otherwise, clients will be able to download the
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AuthDBMGroupFile unless otherwise
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protected.
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Combining Group and Password DBM files: In some cases it is
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easier to manage a single database which contains both the
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password and group details for each user. This simplifies any
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support programs that need to be written: they now only have to
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deal with writing to and locking a single DBM file. This can be
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accomplished by first setting the group and password files to
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point to the same DBM:
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AuthDBMGroupFile "/www/userbase"
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AuthDBMUserFile "/www/userbase"
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The key for the single DBM is the username. The value consists
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of
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Encrypted Password : List of Groups [ : (ignored) ]
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The password section contains the encrypted
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password as before. This is followed by a colon and the comma
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separated list of groups. Other data may optionally be left in the
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DBM file after another colon; it is ignored by the authorization
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module. This is what www.telescope.org uses for its combined
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password and group database.
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Description:Sets the type of database file that is used to
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store list of user groups
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Syntax:AuthzDBMType default|SDBM|GDBM|NDBM|DB
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Default:AuthzDBMType default
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Context:directory, .htaccess
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Override:AuthConfig
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Status:Extension
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Module:mod_authz_dbm
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Sets the type of database file that is used to store the list
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of user groups.
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The default database type is determined at compile time. The
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availability of other types of database files also depends on
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compile-time settings.
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It is crucial that whatever program you use to create your group
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files is configured to use the same type of database.
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Available Languages: en |
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fr |
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ko
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Notice:This is not a Q&A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed again by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Freenode, or sent to our mailing lists.
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