Nginx HTTP Server - Fourth Edition

Auth_basic module

The auth_basic module enables the basic authentication functionality. With the two directives that it brings forth, you can make it so that a specific location of your website (or your server) is restricted to users that authenticate with a username and password:

location /admin/ { 
    auth_basic "Admin control panel"; # variables are supported 
    auth_basic_user_file access/password_file; 
} 

The first directive, auth_basic, can be set to either off or a text message, usually referred to as authentication challenge or authentication realm. This message is displayed by web browsers in a username/password box when a client attempts to access the protected resource.

The second one, auth_basic_user_file, defines the path of the password ...