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Abstract
A Web portal is a convenient way to allow access to electronic resources. However, for a large, geographically dispersed, and mobile user population, it can be difficult to track users' access of the system. Legal liability and the need for valid usage statistics make it important to limit access to legitimate users. The combination of proper access logging and the use of open source software allow the matching of user names to geographic locations. By analyzing geography-based usage patterns, suspicious activity can be identified and corrective actions taken. This paper describes how these techniques were used at the Uniformed Services University of the Health Sciences (USUHS) to better control and monitor user access.