We know when we feel sick and we instinctively know when to go to the doctor. There is however a big difference between us humans and an IT system. However being sick isn’t the end of the world as long as the body is able, or sometimes with medical intervention, enabled to effectively defend itself and mitigate the impact of the infection. A healthy lifestyle will keep us fit but for example, there is no total protection from viral infection. A good analogy is the human immune system. For instance a recent whitepaper from the SANS Institute “Beating the IPS” shows that every Intrusion Prevention System “IPS” from every vendor, can be evaded. In reality however, 100% security is not possible, every threat prevention technique can be evaded and cyber criminals have been very successful at doing so. The challenge for the company is to defend each link and stop the attack at the earliest possible stage along the kill chain, successfully defending itself against the entire Advanced Persistent Threat. The challenge for any hacker is to successfully go through every single stage in this chain to accomplish the end-goal of either attacking the IT infrastructure directly or using the infrastructure as a resource for other criminal activity. The Cyber Kill Chain, a term first used by Lockheed Martin, describes a sophisticated, stealthy and continuous computer hacking process which attackers use nowadays to target their victims. In this document, we are focusing on network security and the different threat prevention techniques used to defend against Advanced Persistent Threats “APTs”. Information security requires a holistic approach that involves many areas of information technology. The main objective of this document is to provide enterprises with a framework under which they can implement and maintain security best practices to defend their network and valuable IT infrastructure.
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If you are interested to learn more, then you should also consider our official Palo Alto Networks training like the new PAN-EDU-231 Advanced Threat Management course where we teach you the insights and best practices on cyber threats and how to protect your enterprise network effectively in real life. This is what this blog post is all about, to provide an overview of the approaches used by hackers to infiltrate a network and explain the threat prevention techniques and best practices to mitigate attacks. The solution is what I like to call the magic sauce, which is to put the right combination of threat prevention techniques together to make it close to impossible for an attacker to evade all of them. The single most important message which we would like to bring across is that that there is no magic box that does everything on its own and any threat prevention technique like AV, IPS or URL Filtering can be evaded and as such doesn’t provide 100% security on its own. We put our five years of experience in designing, implementing, supporting and managing Palo Alto Networks solutions together and wrote this guide to share our best practices to secure an enterprise network using Palo Alto Networks Next-Generation FireWalls.