What is Password Sentry? Password Sentry is a CGI-Perl application that you install on your web server. The primary function of Password Sentry is to monitor logins to a password-protected directory (for example, the members area on a paysite where members purchase access), and to prevent authorized users from sharing their password with unauthorized users. In other words, to detect and block password sharing - thereby only allowing paying members to have legitimate access. When the number of unique logins for a given user exceeds [Threshold] (as defined via Password Sentry Admin Control Panel), that user's access is suspended (and remains suspended until manually restored via the Password Sentry Admin Control Panel, or automatically via cron process), and you are emailed.

Password Sentry is not an user management application, per se. Password Sentry does not (1) allow users to signup, nor (2) expire users. You would require a separate application if you want to provide those capabilities - for example, billing user management script. Most billing companies, however, do provide integrated user management scripts to their clients for no extra charge. With that said, the webmaster does have the option to manually add or delete users via the web-based Password Sentry Admin Control Panel.

Unlike many of our competitors, Password Sentry is NOT an IP counter application. Password Sentry counts unique logins using a number of metrics: user metrics (IP address and ISP), browser metrics, and geographical metrics (city, country, latitude/longitude). This algorithm ensures that false positives (false suspensions) and false negatives (failing to identify password sharing) are negligible.