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Siemens S7 PLC Security: The AA26-231A Hardening Guide
Network Security

Siemens S7 PLC Security: The AA26-231A Hardening Guide

Joint advisory AA26-231A warns of an active, AI-assisted campaign against Internet-exposed Siemens S7 PLCs. This reference maps each S7 family to its protections, explains why TCP port 102 is the exposure, and sorts the advisory's 21 mitigations into a working order.

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