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Recommended Practice for Securing Control System Modems

Technical Report ·
DOI:https://doi.org/10.2172/924510· OSTI ID:924510
This paper addresses an often overlooked “backdoor” into critical infrastructure control systems created by modem connections. A modem’s connection to the public telephone system is similar to a corporate network connection to the Internet. By tracing typical attack paths into the system, this paper provides the reader with an analysis of the problem and then guides the reader through methods to evaluate existing modem security. Following the analysis, a series of methods for securing modems is provided. These methods are correlated to well-known networking security methods.
Research Organization:
Idaho National Laboratory (INL)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC07-99ID13727
OSTI ID:
924510
Report Number(s):
INL/EXT-07-12635
Country of Publication:
United States
Language:
English

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