DACS is a light-weight single sign-on and role-based access control system for web servers and server-based software. DACS makes secure resource sharing and remote access via the web easier, safer, and more efficient. DACS is particularly well suited to providing single sign-on across organizational or departmental web servers, and to limiting access to their web-based resources.
Universal, extensible, modular, and efficient authentication;
Powerful rule-based authorization checking that can be applied selectively and transparently to any resource or activity, such as web services, web content, or program features, by Apache-based web services, CGI programs, servlets, or virtually any program or script;
Secure, web-based single sign-on (SSO);
An Apache 2.2/2.4 module, suite of CGI-based programs, and collection of command line tools for Unix-type platforms (GNU/Linux, FreeBSD, Mac OS X, and others).