System and method for authorizing a network user as entitled to access a computing node wherein authenticated certificate received from the user is mapped into the user identification and the user is presented with the opprtunity to logon to the computing node only after the verification is successful

Abstract

An authenticated network user is verified as entitled to access a network node or server on the network node, before the user is presented with any opportunity to access the system. An initial exchange of conventional protocol messages occurs between the user and the node to establish initial communications. This is done without presenting to the user any opportunity to logon or to access an application. The network node requests the transmission of an authenticated user certificate from the user and the network node verifies from the user certificate that the user represented by the user certificate is entitled to access the node. If the user as identified by the certificate is not entitled to access, the initial connection is dropped and the user is denied any further access opportunity.