How are users authenticated? How are users authenticated?
There are three authentication mechanisms supported by the Barracuda Web Filter. • For Windows domains, the Barracuda Web Filter includes software to be installed on the Windows Domain Controller called the Barracuda DC Agent. This software monitors the Windows login events and provides a mapping of Windows username and IP address to the Barracuda Web Filter so that user policy can be applied transparently to the users. • Additionally, when users attempt to access a resource that is blocked, the Barracuda Web Filter displays a page that presents the opportunity to enter a username and password. This approach does not require the Barracuda DC Agent or any configuration on end users’ Web browsers. • When configured in forward proxy mode, the Barracuda Web Filter can take advantage of standard proxy authentication where browsers send the authentication credentials in the HTTP headers. This form of authentication may require a one-time configuration on the users’ Web browsers. Proxy authen
