Mock LDAP on Ubuntu 22 Open Ldap PHPLdapAdmin— with bug fix

Install OpenLdap

The package is name slapd which stand for Stand alone Ldap

sudo apt-get update
sudo apt-get install slapd ldap-utils

Then config and follow the screen

sudo dpkg-reconfigure slapd

The important step here are

1. Admin password
2. Domain for example example.com will be dc=example,dc=com

Install and Config PHP Ldap Admin

You are good to go if you are on the Ubuntu 23.

** If you are on Ubuntu 22 (latest LTS version) you should skip this and follow the section below

sudo apt-get install phpldapadmin

Edit the file in /etc/phpldapadmin/config.php

Make sure the IP and DC is correct

$servers->setValue('server','base', array('dc=example,dc=com'));
$servers->setValue('server','host','127.0.0.1');
$config->custom->appearance['hide_template_warning'] = true;

Now you can access the screen in

http://<your_ip>/phpldapadmin

Then you can try adding Group and User

Expand the base and create the child entry

You can try on creating Posix Group then User

Then you can try to bind and query with the user / password created.

ldapsearch -x -H ldap://localhost:389 \
-D "cn=thisuser,dc=example,dc=com" \
-b "dc=example,dc=com" \
-W

Ubuntu 22.04 Issue

There is an issue in phpldapadmin that is not yet fixed in this LTS

Unrecognized error number: 8192: trim():
Passing null to parameter #1 ($string) of type string is deprecated

Then you can resolve it by purging and download the new pack

sudo apt-get purge phpldapadmin
wget http://archive.ubuntu.com/ubuntu/pool/universe/p/phpldapadmin/phpldapadmin_1.2.6.3-0.3_all.deb
dpkg -i phpldapadmin_1.2.6.3-0.3_all.deb

Difference between OpenLdap and Microsoft Active Directory Bind

• OpenLdap use DC=, CN= as bind DN
• Microsoft Active Directory use email as bind DN

So to test OpenLdap the command will be

# OpenLdap Query
ldapsearch -x -H ldap://localhost:389 \
-D "cn=thisuser,dc=example,dc=com" \
-b "dc=example,dc=com" \
-W

# On Microsoft below option is working but not in OpenLdap
...
-D "thisuser@example.com"

References

Unrecognized error number: 8192: trim(): Passing null to parameter #1 ($string) of type string is…

https://medium.com/analytics-vidhya/install-openldap-with-phpldapadmin-on-ubuntu-9e56e57f741e