Abstract: Access control methods include receiving an access authorization message from an authentication server computer at a blocking device that connects a first network to a second network, modifying access criteria of a transparent firewall at the blocking device responsive to the received access authorization message and operating the transparent firewall according to the modified access criteria to control transfer of messages between the first and second networks. The invention may also be implemented as apparatus and computer readable media.

Abstract: Access control methods include receiving an access authorization message from an authentication server computer at a blocking device that connects a first network to a second network, modifying access criteria of a transparent firewall at the blocking device responsive to the received access authorization message and operating the transparent firewall according to the modified access criteria to control transfer of messages between the first and second networks. The invention may also be implemented as apparatus and computer readable media.

Abstract: An authentication request message is received at an authentication server computer, the authentication request message identifying a requesting client device. The authentication request message is authenticated at the authentication server computer and, responsive to authentication of the authentication request message, a source port for a redirected communication between the requesting client device associated and the protected server is determined. An access authorization message identifying the determined source port is transmitted from the authentication server computer to a blocking device that controls access to the protected server. A redirect message may be transmitted from the authentication server to a browser resident at the client device responsive to authentication of the authentication request message. Embodiments include methods, apparatus and computer readable media.

Abstract: An access request message is received at an authentication server computer, the access request message identifying an address of an access requesting client device. The authentication server authenticates the access request message and transmits an access authorization message from the authentication server computer to a blocking device that controls access to the protected server computer, the access authorization message identifying the address of the access requesting client device. Access to the protected server computer via the blocking device is controlled responsive to the access authorization message.