Edge SDN Shield by Edge SDN is an appliance that combines a Software-Defined Networking (SDN) switch, an advanced network probe, and an Intrusion Detection System (IDS). Edge SDN Shield protects hosts and microsegments communication while inspecting traffic for malicious activity, without requiring configuration changes in the network. It can be used alone or with third-party SDN switches to create a secure industrial environment, fortifying the network and ensuring operational continuity without disrupting existing infrastructure.