libapache2-mod-authnz-external 3.3.2-0.1 (amd64 binary) in ubuntu vivid

 Mod_Authnz_External can be used to quickly construct secure, reliable
 authentication systems. It can also be mis-used to quickly open gaping
 holes in your security. Read the documentation, and use with extreme
 caution.
 .
 Notably, this module can be used to securely authenticate against PAM
 (without exposing /etc/shadow file), using, for example, pwauth
 authenticator.
 .
 This Package includes the mod-authnz-external Module for Apache Version 2.x