Recommended Practice for Securing Control System Modems

Technical Report · Tue Jan 01 00:00:00 EST 2008

DOI:https://doi.org/10.2172/924510· OSTI ID:924510

Davidson, James R; Wright, Jason L

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 Lab. (INL), Idaho Falls, ID (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: DE-AC07-99ID-13727
• OSTI ID: 924510
• Report Number(s): INL/EXT-07-12635; TRN: US200809%%533
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
CONTROL SYSTEMS
INTERNET
SECURITY
TELEPHONES
Control System
DHS
Modem
Security