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Sniffing and Recovering Network Information Using Wireshark Wireshark is a free and open-source packet analyzer. It is used for network troubleshooting, analysis, software and communications protocol development, and education. Wireshark is cross-platform, using the GTK+ widget toolkit to implement its user interface, and using pcap to capture packets, it runs on various Unix-like operating systems including Linux, OS X, BSD, and Solaris, and on Microsoft Windows. You can download Wireshark for Windows or Mac OS X from the official website (http://www.wireshark. org/download.html). Most Linux systems have pre installed Wireshark tool. In the case that Wireshark is not installed you can just follow the bellow documentaiton and run the proper command for each operation system: Building and Installing Wireshark (http://www.wireshark.org/docs/wsug_html_chunked/ ChapterBuildInstall.html). Wireshark needs to be run as the root user in your system. After Wireshark run, will give you a mes...

Getting Started with Wireshark As a pentester,  always get involved in different projects from different clients and no matter what the objective is, having the knowledge and the proper tool to perform the task will save a lot of time, and avoid some headaches. This article will try to aid for those scenarios where a network analysis should be performed. We will focus in one of the most important tools for a pentester: Wireshark. For most of the engagements a pen tester could perform, there is always a network component, and being able to see, analyze and store all the network transactions is essential to understand network behaviors and evidence all the performed tasks. For such objectives, Wireshark is what was promised, and more. Looking for a formal definition of Wireshark, as stated in the official website (http://www.wireshark.org/faq.htm), it is a free open-source network protocol analyzer. What does this mean? It means that Wireshark will capture all the traffic it can...