Apache2 : Basic Authentication + PAM2021/05/17

	Limit accesses on specific web pages and use OS users for authentication with SSL connection.
[1]	Configure SSL/TLS Setting, refer to here.
[2]	For example, set Basic Authentication under the [/var/www/html/auth-pam] directory.

root@www:~#

apt -y install libapache2-mod-authnz-external pwauth

root@www:~#

vi /etc/apache2/sites-available/auth-pam.conf

# create new

AddExternalAuth pwauth /usr/sbin/pwauth
SetExternalAuthMethod pwauth pipe
<Directory /var/www/html/auth-pam>
    SSLRequireSSL
    AuthType Basic
    AuthName "PAM Authentication"
    AuthBasicProvider external
    AuthExternal pwauth
    require valid-user
</Directory>

root@www:~#

mkdir /var/www/html/auth-pam

root@www:~#

a2ensite auth-pam

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

root@www:~#

systemctl restart apache2

# create a test page

root@www:~#

vi /var/www/html/auth-pam/index.html

<html>
<body>
<div style="width: 100%; font-size: 40px; font-weight: bold; text-align: center;">
Test Page for PAM Auth
</div>
</body>
</html>

[3]	Access to the test page with a Web browser on any Client Computer, then authentication is required for settings. Authenticate with an existing OS user.

[4]	That's OK if authentication passed and test page is shown normally.

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