This pre-conference seminar teaches infrastructure security concepts, including the techniques for how to attack and how to respond with an appropriate countermeasure implementation. Everyone has heard about hackers! It is commonly known that their jobs differ from system administrator jobs. However, things they do in their darkened rooms are definitely interesting and worth knowing. Many of the techniques they use are very useful in everyday administration tasks. A Hackers' knowledge is considered to be valuable, both by system creators and common users. Administrators do not have to be taught how to be a hacker; it is often enough to show them one simple, but very interesting tool or technique, to change their point of view on their own IT environment. Paula Januszkiewicz, Marcus Murray, and Hasain “The Wolf” Alshakarti help you to feel for the hacker's role and evaluate your network from their point of view.