Efficient Plant April 2022 - 14

feature | cybersecurity
OT/IT machine security
OT
IT
IoT platform
This simplifi ed network architecture shows how a cyber-secure IoT edge gateway, with an integrated router, can establish communication so a machine
can access the cloud; either through the plant network or, in this case, using a 4G LTE connection.
greater OT and IT networks, preserving
machine operation and avoiding the need
to modify any existing real-time control or
other programming. It also provides secure
remote connectivity to higher-level computing
systems.
GATEWAY IN ACTION
For the OEM machine builder, the remote
connectivity application may be as simple
as adding secure remote visibility to assets
installed at customer sites. Some machines
may be off ered with HMIs, or PLCs that
can work with mobile apps. Both typically
require opening ports in the plant fi rewall
for remote access.
Instead, these machines should be
upgraded with an IoT edge gateway to
include a virtual private network (VPN)
connection through which the mobile app
can securely connect, while preserving
14 | EFFICIENTPLANTMAG.COM
full machine functionality. Th is provides a
secure machine network and improves the
end user's plant security, without requiring
the OEM to fundamentally change their
product. Another consideration for OEMs
is that selecting an IoT compliant with
IEC62443-1 and IEC62443-2 is another step
toward increasing the value for the end user,
as it allows OEMs to pursue IEC62443-3
on their machines, ensuring that the entire
machine is cyber secure.
IoT edge gateways address this in two
ways. First, shortcuts to HMI web servers or
VNC servers can be accessed conveniently
and securely from the associated gateway
mobile app without requiring open ports in
the fi rewall. Second, the gateway app also
off ers mobile VPN, which provides secure
communication when a third-party HMI or
PLC app is required.
Some cybersecurity challenges are easier
to spot than others, but industrial automation
systems can aff ord no lapses. Many
end users want to add remote connectivity
to new and existing systems so they can
improve the monitoring and control of
their equipment, but they are rightfully
concerned with how to do this in a secure
manner. IoT edge gateways are a universal
method of providing this connectivity, while
eff ectively segregating and securing
machine networks from the plant production,
business, and cloud networks. EP
Jonathan Griffi th is Manager of Industrial
Communications & Power Supplies at
AutomationDirect, Cumming, GA (automationdirect.com).
Previously he worked at
ANADIGICS, a Wi-Fi networking company.
He holds MBA, MSEE, BSEE degrees from
the Georgia Institute of Technology, Atlanta.
E-mail jgriffi th@automationdirect.com.
APRIL 2022

http://www.mationdirect.com http://www.EFFICIENTPLANTMAG.COM

Efficient Plant April 2022

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