The Novell Access Gateway is a reverse proxy server (protected site server) that restricts access to Web-based content, portals, and Web applications that employ authentication and access control policies. It also provides single sign-on to multiple Web servers and Web applications by securely providing the credential information of authenticated users to the protected servers and applications. The Access Gateway lets you simplify, secure, and accelerate your Internet business initiatives. A typical Access Manager configuration includes an Identity Server with LDAP directories and an Access Gateway with a protected Web server.
For more information on installing Access gateway, see NetIQ Access Manager 3.1 SP5 Installation Guide