Security is becoming increasingly important, particularly in large or public buildings, such as hotels, offices, schools and residential complexes. Attackers often exploit weaknesses in network infrastructure. As the building automation frequently also forms part of that infrastructure, operators can suffer significant losses. The Gira KNX IP router v4 ‘Secure’ forms the interface between the network infrastructure of the building and the building automation and consistently closes the security gap. This is based on the new KNX Secure Standard.