LDAP

Authentication Users Password

Presentation

LL::NG can use an LDAP directory to:

  • authenticate user
  • get user attributes
  • get groups where user is registered
  • change password (with server side password policy management)

This works with every LDAP v2 or v3 server, including Active Directory.

LL::NG is compatible with LDAP password policy:

  • LDAP server can check password strength, and LL::NG portal will display correct errors (password too short, password in history, etc.)
  • LDAP sever can block brute-force attacks, and LL::NG will display that account is locked
  • LDAP server can force password change on first connection, and LL::NG portal will display a password change form before opening SSO session

Configuration

In Manager, go in General Parameters > Authentication modules and choose LDAP for authentication, users and/or password modules.

For Active Directory, choose Active Directory instead of LDAP.

Authentication level

The authentication level given to users authenticated with this module.

As LDAP is a login/password based module, the authentication level can be:
  • increased (+1) if portal is protected by SSL (HTTPS)
  • decreased (-1) if the portal autocompletion is allowed (see portal customization)

Exported variables

List of attributes to query to fill user session. See also exported variables configuration.

Connection

  • Server host: LDAP server hostname or URI (by default: localhost). Accept some specificities:
    • More than one server can be set here separated by spaces or commas. They will be tested in the specified order.
    • To use TLS, set ldap+tls://server and to use LDAPS, set ldaps://server instead of server name.
    • If you use TLS, you can set any of the Net::LDAP start_tls() sub like ldap+tls://server/verify=none&capath=/etc/ssl. You can also use cafile and capath parameters.
  • Server port: TCP port used by LDAP server. Can be overridden by an LDAP URI in server host.
  • Users search base: Base of search in the LDAP directory.
  • Account: DN used to connect to LDAP server. By default, anonymous bind is used.
  • Password: password to used to connect to LDAP server. By default, anonymous bind is used.
  • Timeout: server idle timeout.
  • Version: LDAP protocol version.
  • Binary attributes: regular expression matching binary attributes (see Net::LDAP documentation).
LemonLDAP::NG need anonymous access to LDAP Directory RootDSE in order to check LDAP connection.

Filters

In LDAP filters, $user is replaced by user login, and $mail by user email.
  • Default filter: default LDAP filter for searches, should not be modified.
  • Authentication filter: Filter to find user from its login (default: (&(uid=$user)(objectClass=inetOrgPerson)))
  • Mail filter: Filter to find user from its mail (default: (&(mail=$mail)(objectClass=inetOrgPerson)))
  • Alias dereference: How to manage LDAP aliases. (default: find)
For Active Directory, the default authentication filter is:
(&(sAMAccountName=$user)(objectClass=person))

And the mail filter is:

(&(mail=$mail)(objectClass=person))

Groups

  • Search base: DN of groups branch. If no value, disable group searching.
  • Object class: objectClass of the groups (default: groupOfNames).
  • Target attribute: name of the attribute in the groups storing the link to the user (default: member).
  • User source attribute: name of the attribute in users entries used in the link (default: dn).
  • Searched attributes: name(s) of the attribute storing the name of the group, spaces separated (default: cn).
  • Recursive: activate recursive group functionality (default: 0). If enabled, if the user group is a member of another group (group of groups), all parents groups will be stored as user's groups.
  • Group source attribute: name of the attribute in groups entries used in the link, for recursive group search (default: dn).

Password

  • Password policy control: enable to use LDAP password policy. This requires at least Net::LDAP 0.38. (see ppolicy workflow below)
  • Password modify extended operation: enable to use the LDAP extended operation password modify instead of standard modify operation.
  • Change as user: enable to perform password modification with credentials of connected user. This requires to request user old password (see portal customization).
  • LDAP password encoding: can allow one to manage old LDAP servers using specific encoding for passwords (default: utf-8).
  • Use reset attribute: enable to use the password reset attribute. This attribute is set by LemonLDAP::NG when password was reset by mail and the user choose to generate the password (default: enabled).
  • Reset attribute: name of password reset attribute (default: pwdReset).
  • Reset value: value to set in reset attribute to activate password reset (default: TRUE).
  • Allow a user to reset his expired password: if activated, the user will be prompted to change password if his password is expired (default: 0)

Password expiration warning workflow
Password expiration workflow