As presented at ITExpo 2017 and the April Peerlyst Tel-Aviv security Meetup. Can your company afford to ignore VoIP security? With the number of attacks on your telephone services and mobile devices your chance of being attacked and financial liability is at an all time high. This session offers an introductory primer to securing your VoIP PBX. This talk will include explanations about common attacks, how they can find you, and common techniques you can use to defend your company.