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Wireshark: The Ultimate Network Packet Analyzer Guide

Wireshark is a powerful open-source network packet and protocol analyzer used by network administrators, security engineers, and developers to troubleshoot and debug network issues. This guide is a digest from the "Wireshark User's Guide" and provides insights on capturing network packets, configuring the software, and using promiscuous mode. It highlights Wireshark's purpose: capturing, analyzing, and displaying packet data without altering the network. Resources for installation and further learning are also included.

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Wireshark: The Ultimate Network Packet Analyzer Guide

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  1. ITIS3100 By Fei Xu

  2. Acknowledge • This document is basically a digest from “Wireshark User's Guide 25114 for Wireshark 1.0.0” • You can download the software and document at http://www.wireshark.org/ • http://wiki.wireshark.org • All logos and trademarks in this document are property of their respective owner.

  3. What is Wireshark? • Wireshark is a network packet/protocol analyzer. • A network packet analyzer will try to capture network packets and tries to display that packet data as detailed as possible. • Wireshark is perhaps one of the best open source packet analyzers available today for UNIX and Windows.

  4. Some intended purposes • network administrators use it to troubleshoot network problems • network security engineers use it to examine security problems • developers use it to debug protocol implementations • people use it to learn network protocol internals • Wireshark isn't an intrusion detection system. • Wireshark will not manipulate things on the network, it will only "measure" things from it.

  5. Install under Windows • Download • Install

  6. Install under Debian/ Ubuntu • # apt-get install wireshark

  7. Configuration This checkbox allows you to specify that Wireshark should put the interface in promiscuous mode when capturing. If you do not specify this, Wireshark will only capture the packets going to or from your computer (not all packets on your LAN segment).

  8. IMPORTANT • TURN PROMISCUOUS MODE OFF! • IF YOU'RE AT WORK, YOUR NETWORK ADMINISTRATOR MAY SEE YOU RUNNING IN PROMISCUOUS MODE AND SOMEBODY MAY DECIDE TO FIRE YOU FOR THAT.

  9. Live Demo • HTTP • DNS • ARP Photo credit: Jeff Kubina

  10. More resource • http://wiki.wireshark.org • http://wiki.wireshark.org/SampleCaptures • Search “wireshark tutorial”

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