Ubuntu 24.04
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Apache2 : Basic Authentication + LDAP2024/05/17


Configure [mod_ldap] to use LDAP directory users on httpd Basic authentication.
On this example, it uses Active Directory like following environment for it.

Domain Server : Windows Server 2022
Domain Name : srv.world
Hostname : fd3s.srv.world
NetBIOS Name : FD3S01
Username and password are sent with plain text on Basic Authentication,
so Use secure connection with SSL/TLS setting, refer to here.
Create a user on Active Directory for binding Active Directory from Apache2.
On this example, it creates [ldapuser], it's OK to grant [Domain Users] rights only for it.
[3] Configure Basic authentication + LDAP.
For example, set Basic Authentication to the directory [/var/www/html/auth-ldap].
vi /etc/apache2/sites-available/auth-ldap.conf
# create new
# on example below, it limits the range to search the directory only [Hiroshima] OU
# so only users under the [Hiroshima] OU can authenticate with this setting
# for [AuthLDAPBindDN] and [AuthLDAPBindPassword], specify the AD user for binding

<Directory "/var/www/html/auth-ldap">
    AuthType Basic
    AuthName "LDAP Authentication"
    AuthBasicProvider ldap
    AuthLDAPURL "ldap://fd3s.srv.world:389/ou=Hiroshima,dc=srv,dc=world?sAMAccountName?sub?(objectClass=*)"
    AuthLDAPBindDN ldapuser@srv.world
    AuthLDAPBindPassword Password
    Require valid-user

chgrp www-data /etc/apache2/sites-available/auth-ldap.conf

chmod 640 /etc/apache2/sites-available/auth-ldap.conf

a2ensite auth-ldap

Enabling site auth-ldap.
To activate the new configuration, you need to run:
  systemctl reload apache2

a2enmod authnz_ldap

Considering dependency ldap for authnz_ldap:
Enabling module ldap.
Enabling module authnz_ldap.
To activate the new configuration, you need to run:
  systemctl restart apache2

systemctl restart apache2

# create a test page

mkdir /var/www/html/auth-ldap

vi /var/www/html/auth-ldap/index.html
<p style="width: 100%; font-size: 40px; font-weight: bold; text-align: center;">
Test Page for LDAP Authentication
[4] Access to the test page from any client computer with web browser. Then authentication is required as settings, answer with any AD user.
[5] That's OK if authentication is successfully passed and test page is displayed normally.
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