Computer communications security: principles, standard protocols and techniques
Computer communications security: principles, standard protocols and techniques
Firewalls and Internet security: repelling the wily hacker
Firewalls and Internet security: repelling the wily hacker
Open Systems Networking: TCP/IP and OSI
Open Systems Networking: TCP/IP and OSI
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A firewall is a well established security measure for connecting to the Internet (TCP/IP) protocol suite). Government procurement profiles for data communication products (GOSIPs-Government OSI Profile) usually demand use of official international standards, as defined by the International Standards Organization (ISO). ISO has defined a framework for Open Systems Interconnection (OSI), and develops protocol specifications (ISO protocols) to fit in this framework. It can be assumed that firewalls are also going to be an important security measure when using ISO protocols. But firewall products for ISO protocols still remain to be seen, and little research has been done regarding firewalls in an OSI environment. This paper discusses the consequences of introducing ISO protocols from a firewalls point of view. As one might suspect, it is not trivial to transform from TCP/IP to OSI in this matter. Fundamental problems are presented, and recommendations are given on how to solve them. Use of a firewall to map between internal and external security policies is discussed.