# documentation:2.0:ldapconfbackend
Keywords: documentation,2.0,ldapconfbackend

# LDAP configuration backend

## Presentation

You can choose to store LemonLDAP::NG configuration in an LDAP directory.

Advantages:

- Easy to share between servers with remote LDAP access
- Easy to duplicate with LDAP synchronization services (like SyncRepl in OpenLDAP)
- Security with SSL/TLS
- Access control possible by creating one user for Manager (write) and another for portal and handlers (read)
- Easy import/export through LDIF files

The configuration will be store under a specific branch, for example `ou=conf,ou=applications,dc=example,dc=com`.

Each configuration will be represented as an entry, which structural objectClass is by default `applicationProcess`. The configuration name is the same that files, so lmConf-1, lmConf-2, etc. This name is used in entry DN, for example `cn=lmConf-1,ou=conf,ou=applications,dc=example,dc=com`.

Then each parameter is one value of the attribute `description`, prefixed by its key. For example `{ldapPort}389`.

The LDIF view of such entry can be:

    dn: cn=lmConf-1,ou=conf,ou=applications,dc=example,dc=com
    objectClass: top
    objectClass: applicationProcess
    cn: lmConf-1
    description: {globalStorage}'Apache::Session::File'
    description: {cookieName}'lemonldap'
    description: {whatToTrace}'$uid'
    ...

## Configuration

### LDAP server

Configuration objects use standard object class: `applicationProcess`. This objectClass allow attributes `cn` and `description`. If your LDAP server do not manage this objectClass, configure other objectclass and attributes (see below).

We advice to create a specific LDAP account with write access on configuration branch.

Next create the configuration branch where you want. Just remember its DN for LemonLDAP::NG configuration.

### LemonLDAP::NG

Configure LDAP configuration backend in `lemonldap-ng.ini`, section `[configuration]`:

    type = LDAP
    ldapServer = ldap://localhost
    ldapConfBase = ou=conf,ou=applications,dc=example,dc=com
    ldapBindDN = cn=manager,dc=example,dc=com
    ldapBindPassword = secret
    ldapObjectClass = applicationProcess
    ldapAttributeId = cn
    ldapAttributeContent = description

Parameters:

- ldapServer: LDAP URI of the server
- ldapConfBase: DN of configuration branch
- ldapBindDN: DN used to bind LDAP
- ldapBindPassword: password used to bind LDAP
- ldapObjectClass: structural objectclass of configuration entry (optional)
- ldapAttributeId: RDN attribute of configuration entry (optional)
- ldapAttributeContent: attribute used to store configuration values, must be multivalued (optional)