Industrial control gateways connect most of the critical infrastructure surrounding us to the centralized management systems: From power grids (transformer stations, solar fields), city infrastructure (traffic lights, tunnel control systems) to big industrial plants (automotive, chemical), these devices can be found almost everywhere. In the last years these gateways have even been known to be used in attacks on countries such as the Ukraine in 2015 and Saudi Arabia in 2018. This presentation reviews the security of those gateways; going from attacking the communication protocols up to reverse engineering and fuzzing proprietary firmwares and protocols, concluding with a live demonstration of the vulnerabilities on real devices, showing that the industrial control gateways from most vendors have significant security shortcomings and are not secure enough to be used in critical infrastructure.