Hendrik Schmidt and Brian Butterly are seasoned security researchers with vast experiences in large and complex enterprise networks. Over the years they focused on evaluating and reviewing all kinds of network protocols and applications. They love to play with packets and use them for their own purposes. In this context they learned how to play around with telecommunication networks, wrote protocol fuzzers and spoofers for testing their implementation and security architecture. Both are pentesters and consultants at the German based ERNW GmbH and will happily share their knowledge with the audience.