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Top-down Integrated Security Architecture for Heterogeneous IP Networks

The need of data and transaction protection has made access control and security a necessity. This has led to extensive research in the academic community that resulted in the specification of various protocols used to implement it. These protocols differ greatly and are rarely compatible with one another or towards the security policy they are designed to implement. There also exist proprietary protocols usually compatible only with a certain number of products, most of which are not widely recognized and adopted. Thus appeared the need for a comprehensive and compatible-oriented security policy design. This policy should support features as: Authentication, Authorization and Accounting, DMZ architecture, Intrusion detection, Service Level Agreement mechanisms and Disaster recovery of critical data. We shall take a casestudy approach by examining the experimental network of the OTE Multimedia Labs designed in the course of several research programs conducted in the European community's research framework programs.