Traditional factories have long been an information silo with fewer cybersecurity concerns than enterprise networks, which typically have numerous external access points. Nowadays, smart factories involve mass-customization and cloud services, which requires IT and OT to be integrated by connections to sensors, machines, and production lines. Through technology, smart factories can consolidate data, making the ICS (Industrial Control System) network in these factories more vulnerable to the external and internal threats such as hacking, malicious attacks, or even malpractice by employees. To address these issues, the top priority when enabling cybersecurity is to allow only necessary traffic on mission-critical networks. In other words, you need to create a “clean” network environment to protect smart machines, production lines and ultimately your entire factory. This level of protection is achieved with industrial firewalls and other industrial networking devices that comply with the IEC 62443 industrial security standard. IEC 62443 defines guidelines for different parts of a network and those who perform different responsibilities on the network.