White Papers

Run-Time Protocol-Conformance Verification in Firewalls

Overview Business continuity depends significantly on the continuous availability of information systems. It is well-known that such systems must be protected against intrusion and denial of service attacks. Historically, many of such attacks used ill-formed data-packets and/or protocol runs, which did not conform to the protocols' standards. Attackers exploited vulnerabilities of the protocols' implementations in the servers' operating systems: conformance with protocol standards was not tested properly. Prominent examples are: the ping of death, the land attack, the SYN flood attack. To protect information systems better, one should aim to recognize and block such attacks as early as possible, i.e. already in a firewall at a company network's border.

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Publisher
University of Fribourg
File Format
PDF
Date Published
Oct 1, 2008
Format
White Papers
Topics
Firewalls, Network Security

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