Mastodawn

Secure ICS OT

@Secure_ICS_OT@infosec.exchange

458 Followers

245 Following

1,012 Posts

ICS/OT posts from a GICSP. ISA member working on ISA 62443 Certs. Canadian.

My posts are my own and are not a reflection of my place of work or employer.

Twitter: @Secure_ICS_OT

Bluesky: @secure-ics-ot.bsky.social

#ICS #OT #GICSP #IEC62443

Joined	Nov 10, 2022
Certs	GICSP, 62443 Cert 1 and 2.

Secure ICS OT

8h ago

Standardization is awesome and it helps reduce surface area and effort.

But you should not standardize equipment between ICS/OT and IT as you now share CVEs.

Think of it using the Swiss cheese model.

Secure ICS OT

19h ago

You would never expose a firewall management interface to the internet.

So don't expose an ICS/OT management interface to the Corporate network or internet.

IT and ICS/OT are not the same:

IT is concerned about data that is in databases.

ICS/OT is concerned about real time sensor data.

Secure ICS OT

1d ago

https://www.securityweek.com/siemens-notifies-customers-of-microsoft-defender-antivirus-issue/

https://arstechnica.com/security/2025/06/suspected-china-state-hackers-exploited-patched-flaw-to-breach-canadian-telecom/

Canadian telecom hacked by suspected China state group

Maximum-security Cisco vulnerability was patched Oct. 2023 and exploited Feb. 2025.

Ars Technica

Secure ICS OT

2d ago

https://youtu.be/ru5afNNSPeU?si=THiiX4LFFMbYGDTV

Jack White – Archbishop Harold Holmes (Official Video)

YouTube

Secure ICS OT

3d ago

Pro tip: For securing an ICS/OT.

Visit it and the people operating it.