Authenticate user login against FTP, IMAP or SMB.
Passwords are not stored locally; authentication always happens against the remote server.
It stores users and their display name in its own database table
users_external.
When modifying the user_backends configuration, you need to
update the database table's backend field, or your users will lose
their configured display name.
If something does not work, check the log file at nextcloud/data/nextcloud.log.
Authenticate Nextcloud users against a FTP server.
You only need to supply the FTP host name or IP.
The second - optional - parameter determines if SSL should be used or not.
Add the following to config.php:
'user_backends' => array(
array(
'class' => 'OC_User_FTP',
'arguments' => array('127.0.0.1'),
),
),
To enable SSL connections via ftps, append a second parameter true:
'user_backends' => array(
array(
'class' => 'OC_User_FTP',
'arguments' => array('127.0.0.1', true),
),
),
PHP automatically contains basic FTP support.
For SSL-secured FTP connections via ftps, the PHP openssl extension needs to be activated.
Authenticate Nextcloud users against an IMAP server. IMAP user and password need to be given for the Nextcloud login.
The parameters are host, port, sslmode, domain.
Possible values for sslmode are ssl or tls.
Add the following to your config.php:
'user_backends' => array(
array(
'class' => 'OC_User_IMAP',
'arguments' => array(
'127.0.0.1', 993, 'ssl', 'example.com'
),
),
),
This connects to the IMAP server on IP 127.0.0.1.
The default port is 143; however if you want to restrict the domain, you need to specify the port and set sslmode to null.
If a domain name (e.g. example.com) is specified, then this makes sure that
only users from this domain will be allowed to login. After successfull
login the domain part will be striped and the rest used as username in
Nextcloud. e.g. 'username@example.com' will be 'username' in Nextcloud.
Utilizes the smbclient executable to authenticate against a windows
network machine via SMB.
The only supported parameter is the hostname of the remote machine.
Add the following to your config.php:
'user_backends' => array(
array(
'class' => 'OC_User_SMB',
'arguments' => array('127.0.0.1'),
),
),
The smbclient executable needs to be installed and accessible within $PATH.
Authenticate users by a WebDAV call. You can use any WebDAV server, Nextcloud server or other web server to authenticate. It should return http 200 for right credentials and http 401 for wrong ones.
Attention: This app is not compatible with the LDAP user and group backend. This app is not the WebDAV interface of Nextcloud, if you don't understand what it does then do not enable it.
The only supported parameter is the URL of the web server.
Add the following to your config.php:
'user_backends' => array(
array(
'class' => '\OCA\User_External\WebDAVAuth',
'arguments' => array('https://example.com/webdav'),
),
),
Authenticate users by an HTTP Basic access authentication call. HTTP server of your choice to authenticate. It should return HTTP 2xx for correct credentials and an appropriate other error code for wrong ones or refused access.
The only supported parameter is the URL of the web server where the authentication happens.
Add the following to your config.php:
'user_backends' => array(
array(
'class' => 'OC_User_BasicAuth',
'arguments' => array('https://example.com/basic_auth'),
),
),
Authenticate Nextcloud users against a Prosody XMPP MySQL database. Prosody user and password need to be given for the Nextcloud login
Add the following to your config.php:
'user_backends' => array (
0 => array (
'class' => 'OC_User_XMPP',
'arguments' => array (
0 => 'dbhost',
1 => 'prosodydb',
2 => 'dbuser',
3 => 'dbuserpassword',
4 => 'xmppdomain',
),
),
),
Other extensions allow connecting to external user databases directly via SQL, which may be faster: