MOXA (2015) How to Choose the Right Industrial Firewall The Top 7 Considerations
MOXA (2015) How to Choose the Right Industrial Firewall The Top 7 Considerations

The right industrial firewall can strengthen the safety and reliability of
control systems
Central to industrial control systems, industrial control networks help facilitate efficient and
safe operations in vital sectors such as utilities, oil and gas, water, transportation, and
manufacturing. A resilient control network relies on a network that can effectively detect and
filter unwanted traffic. Traditionally, some industrial control networks are physically isolated or
air gapped to ensure network security. However, that may not be the best practice as control
systems are increasingly more interconnected to exchange data and to enable smarter
automation.
One major concern of converged networks is the emergence of a new class of threats that
targets industrial automation systems. Often lacking security measures, legacy networks are
particularly vulnerable to malicious network attacks or unintended operations. Once
compromised, these legacy networks can become back doors that allow attackers and
unauthorized personnel to gain access to the plant network from enterprise networks or other
industrial networks.
To address the issues of network security for industrial control systems, a clear understanding
of the security challenges and effective defensive countermeasures are required. A “defensein-
depth” approach can be applied to industrial control systems for protection of critical
equipment, and expanding security coverage on your automation network at various locations,
device cells, function zones, and factory sites. Choosing the right industrial network security
equipment could be the key to success.
In this paper, we present important considerations for implementing network security and
network security risk management. We also include information on how to develop mitigation
strategies for specific problems and provide directions on how to choose the right industrial
firewall to ensure safety and reliability for industrial networks.

MOXA (2015) How to Choose the Right Industrial Firewall The Top 7 Considerations

MOXA (2015) How to Choose the Right Industrial Firewall The Top 7 Considerations