I set up Basic authentication with Apache + Passenger, so here’s a memo.

Create a password file for a user named myuser.

# htpasswd -c /usr/local/apache2/.htpasswd myuser

Modify Apache’s configuration file.

# vim /usr/local/apache2/conf/extra/passenger.conf

    PassengerUserSwitching off
    PassengerDefaultUser app

    ServerName example.com
    DocumentRoot "/srv/example.com/current/public"
    ErrorLog "logs/example.com-error_log"
    CustomLog "logs/example.com-access_log" common
    
        AllowOverride all
        Options -MultiViews
        Order allow,deny
        Allow from all
    
    
        AuthType Basic
        AuthName "Please enter your ID and Password"
        AuthUserFile /usr/local/apache2/.htpasswd
        Require user myuser
    

Restart Apache

# service httpd restart

That’s all from the Gemba.

【Reference】

・＠IT：Apacheでユーザー認証を行うには（Basic認証編）

・blog.sowatchasayin: rails + passengerでbasic認証