ICS protocol coverage using Snort 3 service inspectors

With more devices on operational technology (OT) networks now getting connected to wide-reaching IT networks, it is more important than ever to have effective detection capabilities for ICS protocols. However, there are a few issues that usually arise when creating detection for ICS protocol traffic. Oftentimes, the protocols connecting these devices on modern networks originate in older serial protocols. This transition resulted in protocols that use techniques like bitfields to reduce message size and multiple levels of encapsulation to avoid changes to the original protocol. These protocols often support combining mu

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Source: Talos