Introduction

This document explains how to improve protection in Modicon M340 architectures against cyber-attacks relying on a firewall device such as the EAGLE40-07 from Belden, configured to establish VPN connections. Deploying such device in an architecture allows to mitigate most of vulnerabilities existing in the devices and drastically reduce the attack surface of the different products.

In any cases, whether a device such as the EAGLE40-07 is used or not, we strongly recommend following good practices to harden the network, workstations and devices, as described in the Modicon Controllers Platforms Cyber Security, Reference Manual available for download at the following URL: https://www.se.com/ww/en/download/document/EIO0000001999/