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.
Authentication level
The authentication level given to users authenticated with this module.
Attention
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)
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 if different from the standard
ports. Can also be specified in the server host URI.
- Verify LDAP server certificate: It is highly recommended to verify the
identity of the remote server. This setting is only enforced for LDAPS or
TLS connections.
- 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.
- Connection timeout: applies only when initiating the connection
- Operation timeout: applies to all LDAP operations
- Version: LDAP protocol version.
- Binary attributes: regular expression matching binary attributes
(see
Net::LDAP
documentation).
- CA file path: This allows you to override the default system-wide
certificate authorities by giving a single file containing the CA used by the
LDAP server.
- CA directory path: This allows you to override the default system-wide
certificate authorities by giving the path of a directory containing your
trusted certificates.
Attention
LemonLDAP::NG need anonymous access to LDAP Directory
RootDSE in order to check LDAP connection.
Filters
Tip
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=$mail)(objectClass=inetOrgPerson))
)
- Alias dereference: How to manage LDAP aliases. (default:
find
)
Tip
For Active Directory, the default authentication filter is:
(&(sAMAccountName=$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).
- Decode searched value: with Active Directory, member DN value is
sometimes bad decoded and groups are not found, activate this option
to force value decoding.
- 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).
Note
The groups that the user belongs to are available as $groups
and %hGroups
, as documented here
Attention
If your LDAP countains over a thousand groups, you
should avoid using group processing, check out
the performance page for
alternatives
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: disabled)
- Search for user before password change: this option forces the password
- change module to search for the user again, refreshing its DN. This feature
is only useful in rare cases when you use LDAP as the password module, but
not as the UserDB module. (default: enabled)
- IBM Tivoli DS support: enable this option if you use ITDS. LL::NG
will then scan error message to return a more precise error to the
user.
Password expiration warning workflow
Password expiration
workflow 