I am, and always will be, a big fan of the phrase "you cannot manage what you cannot measure." If you want to protect your network, it is critical to start by learning what is actually on it. This utility is, in my opinion, the king of its realm.Īlternatives – TCPdump, nGREP, Cloudshark, LANGuardian Discover the Network Around You Wireshark also has a tremendous wealth of resources including Documentation, References, and even Sample Captures to download and review. This utility is cross-platform, stable, and comes with a cli peer application ( Tshark) that uses all of the same filters and can be used to analyze from hosts without a UI. While there are a number of network security tools out there for packet analysis, none of them compare to Wireshark. This is a core skill set for any security professional. Packet analysis is not only a good place to start on security, but it is also a good way to brush up on networking in general. Well, it's hard to get smaller than the packets themselves. We have all heard the advice to “start small” when trying to learn something new. Let's take a look at a few of the tools available, which will not only provide some answers, but also help you learn more about the topic. This is complicated by the fact that most of the network security tools available have a very steep learning curve, and that many of these tools can be hazardous to run on a production network. The sheer number of free open source tools available can make it difficult to choose a place to start. With so many open source tools available to help with network security, it can be tricky to figure out where to start, especially if you are an IT generalist who has been tasked with security.
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