Ubuntu 22.04
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Apache2 : Basic Authentication2022/05/10

 
Set Basic Authentication to limit access on specific web pages.
[1]
Username and password are sent with plain text on Basic Authentication,
so Use secure connection with SSL/TLS setting, refer to here.
[2] Configure Apache2.
For example, set Basic Authentication to the directory [/var/www/html/auth-basic].
root@www:~#
apt -y install apache2-utils
root@www:~#
vi /etc/apache2/sites-available/auth-basic.conf
# create new

<Directory /var/www/html/auth-basic>
    SSLRequireSSL
    AuthType Basic
    AuthName "Basic Authentication"
    AuthUserFile /etc/apache2/.htpasswd
    require valid-user
</Directory> 

# add a user : create a new file with [-c]

root@www:~#
htpasswd -c /etc/apache2/.htpasswd ubuntu

New password:    
# set password

Re-type new password:
Adding password for user ubuntu
root@www:~#
mkdir /var/www/html/auth-basic

root@www:~#
a2ensite auth-basic

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

root@www:~#
systemctl reload apache2
# create a test page

root@www:~#
vi /var/www/html/auth-basic/index.html
<html>
<body>
<div style="width: 100%; font-size: 40px; font-weight: bold; text-align: center;">
Test Page for Basic Authentication
</div>
</body>
</html>
[3] Access to the test page from any client computer with web browser. Then authentication is required as settings, answer with a user added in [1].
[4] That's OK if authentication is successfully passed and test page is displayed normally.
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