Even if all applications and IT services have been developed according to the current standards, security gaps in the underlying infrastructure can still endanger the entire system and subsequently the entire organization. For this reason, the IT infrastructure should be checked regularly. Regularly because every configuration change and every update can result in new vulnerabilities. The experts from CERTAINITY carry out these checks for our clients and bring the external view into these increasingly complex infrastructures, which do not always have to be in their own network since the advance of cloud technologies. Networks, locations, cloud environments, hybrid environments and also OT domains are available as scopes for our services in this area. Both the external test and the internal test are included. In cooperation with our secure system engineering, appropriate solution proposals are developed after the check, with the implementation of which we also support our customers.