Trends such as Industry 4.0 or the Internet of Things lead to increased networking and integration of various data in the production. At the same time, the increased networking posses challenges regarding security issues. Negative examples involve the unsecured connection of various programmable logic controllers (PLCs) that are reachable through the Internet. In part, but also inadvertently, there are additional risks for the production plant. The reasons are the comfortable maintenance of plants as well as using external support for complex problems.