Techwem

[Techwem @Techwem]

Learning PLC, DCS, SCADA or OT cybersecurity?

Stop collecting random theory.

Build practical industrial confidence with daily questions, simulator-style scenarios and structured learning paths.

Start free:
https://t.co/pNBDe18U6f

#PLC #DCS #SCADA #OTCybersecurity

[Techwem @Techwem]

@amatsuuni The video is taken out of context. He in his whole speech describes benefits of having marriages in society rather than Boyfriend/Girlfriend system & 1 or 2 child families. He then goes on and add prediction what might happen if Japan and European Countries doesnt change.

[Techwem @Techwem]

Watch Full Video: https://t.co/TQ0P0hZLbx

[Techwem @Techwem]

🧠 OT Networking Quiz

Which statement about multicast traffic is correct?

A) Sent to all devices
B) Sent to a specific group
C) Needs no configuration
D) Not used in industrial protocols
Drop your answer 👇
#OTCybersecurity #IndustrialNetworking #Multicast #ICS

[Techwem @Techwem]

A packet can be valid.

The protocol can be allowed.

The command can still be dangerous.

In OT, cybersecurity must understand more than source, destination and port.

It must understand intent.

🎥 Full breakdown: link in description

#OTCybersecurity #ICS #SCADA

[Techwem @Techwem]

Two log lines from the same second.

Firewall: ALLOW · 10.20.4.15 → 10.20.1.10 · TCP 502 · function 06 · write single register

Historian: PUMP P-101 STARTED · suction valve CLOSED · tank level 2%

Full story, 5 minutes: https://t.co/HlqTJ90ezR

[Techwem @Techwem]

IT security's classic order: Confidentiality → Integrity → Availability.

In a plant, it flips: Availability → Integrity → Confidentiality.

And safety sits above all three.

10 roles, one plant, explained 👇

https://t.co/4q2N597hYZ

[Techwem @Techwem]

5/ Purdue explains location.
Zones and conduits explain protection.

Not competitors. Complementary lenses.

Full 9-minute breakdown — conduit registers, DMZ limits, a third-party skid
case study — is up for members: https://t.co/auxIjky4kl

[Techwem @Techwem]

1/ "Level 3 can talk to Level 2" is not a firewall rule.

It is a sentence that sounds like security and specifies nothing.

A thread on why the Purdue model is not a security design 🧵

[Techwem @Techwem]

4/ So the real project questions are not "where does it sit" but:

· What may communicate?
· Why does that flow exist?
· Which boundary enforces it?
· Who owns the decision?
· What happens when it fails?

A diagram answers none of these.

[Techwem @Techwem]

8/ Full 7-minute breakdown: https://t.co/B5IBNKWxQr

Engineers: has AI-generated logic ever reached a live controller on your watch? What happened?

[Techwem @Techwem]

1/ "Will AI replace PLC programmers?"

Honest answer: it replaces parts of the job. It is not close to replacing the role.

Here is where the line actually sits. 🧵

[Techwem @Techwem]

7/ So the job shifts. Less typing. More requirements, review, edge cases, and proof.

Treat AI like a junior assistant: bounded task, stated assumptions, exposed unknowns, reviewed output.

Approval follows evidence, not confidence.

[Techwem @Techwem]

Building an ICS/OT cybersecurity toolkit?

Start with the open-source tools.

This video explores practical tools for:
• Packet analysis
• Network monitoring
• Industrial protocols
• Threat detection

🎥 Full video: https://t.co/XUQB99hP57

#OTCybersecurity #ICSSecurity #ICS