ITTC Communication Networks Laboratory The University of Kansas EECS 780 Introduction to Protocol Analysis with Wireshark
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1 Communication Networks Laboratory The University of Kansas EECS 780 Introduction to Protocol Analysis with Wireshark Trúc Anh N. Nguyễn, Egemen K. Çetinkaya, Mohammed Alenazi, and James P.G. Sterbenz Department of Electrical Engineering & Computer Science Information Technology & Telecommunications Research Center The University of Kansas 28 August 2017 rev James P.G. Sterbenz
2 Protocol Analysis with Wireshark Outline L1.0 EECS 780 laboratory outline L1.1 Motivation and overview L1.2 Wireshark installation and use L1.3 Protocol analysis examples L1.4 Getting started 28 August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-2
3 EECS 780 Laboratories Outline L1.0 EECS 780 laboratory outline L1.1 Motivation and overview L1.2 Wireshark installation and use L1.3 Protocol analysis examples L1.4 Getting started 28 August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-3
4 EECS 780 Laboratories Semester Outline Wireshark labs throughout semester, intuitive, based on textbook Wiki and web authoring requires KU, or ITTC account Socket programming relatively simple lab to demonstrate socket concepts Network simulation lab to introduce network simulation 28 August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-4
5 Protocol Analysis with Wireshark Motivation and Overview L1.0 EECS 780 laboratory outline L1.1 Motivation and overview L1.2 Wireshark installation and use L1.3 Protocol analysis examples L1.4 Getting started 28 August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-5
6 Motivation and Overview Introduction 1 Wireshark is a network protocol analyzer First released in 1998 by Gerald Combs as Ethereal many contributors around the world Open source and free software Graphical alternative to tcpdump 28 August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-6
7 Motivation and Overview Introduction 2 Powerful tool for network troubleshooting Sniffs and captures live traffic Filters data for ease of analysis Statistics and graphs available Used in industry and academia 28 August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-7
8 Protocol Analysis with Wireshark Wireshark Installation and Use L1.0 EECS 780 laboratory outline L1.1 Motivation and overview L1.2 Wireshark installation and use L1.3 Protocol analysis examples L1.4 Getting started 28 August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-8
9 Wireshark Installation Highlights Wireshark can be installed on various platforms UNIX, MS, Linux, Mac OS, etc Most recent release is v.2.4.0, 19 July 2017 System requirements section 1.2 at rule of thumb: fast CPU, more memory is better FAQs and Wiki pages provide more information 28 August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-9
10 Wireshark Installation Overview Installation of Wireshark requires downloading the relevant package building the source into binary if the source is downloaded install binaries to their destinations section 2 provides detailed installation instructions Windows installation includes WinPcap packet capture library (also needed for tcpdump) Installation easy and intuitive 28 August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-10
11 Go to wireshark.org Wireshark Usage Windows 10 Installation 1 Click on Download Wireshark Save and run the executable (.exe) file Installation wizard is intuitive 28 August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-11
12 pcap library is required to capture lowlevel network messages Wireshark Usage Windows 10 Installation 2 WinPcap for Windows, libpcap for UNIX/Linux Latest WinPcap release August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-12
13 Wireshark Installation Windows 10 Installation 3 28 August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-13
14 Capturing live traffic Wireshark Usage Main Features data can be captured on wired or wireless medium Numerous protocols can be captured and analyzed Filtering is essential when dealing with lots of packets filters can be applied on protocols, fields, values, etc. filtering while capturing packets is possible 28 August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-14
15 menu main toolbar filter toolbar Wireshark GUI Main Window packet list pane packet details pane packet bytes pane status bar 28 August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-15
16 To capture: go to Capture menu and select Options Wireshark Usage Starting Capture Start capturing on interface that has IP address Other ways of capturing possible 28 August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-16
17 Once the capturing starts, until the data is exchanged on Network Interface Card (NIC), main window will be blank Wireshark Usage Capturing 1 28 August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-17
18 When packets exchanged on NIC, the packets will be dumped to main window Wireshark Usage Capturing 2 28 August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-18
19 Capturing can be stopped by clicking on Stop the running capture button on the main toolbar Wireshark Usage Stopping Capture 28 August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-19
20 Filter by entering the protocol name or field name and click the apply button in the filter menu Wireshark Usage Filtering Detailed filters can be applied by creating expressions 28 August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-20
21 Protocol Analysis with Wireshark Protocol Analysis and Examples L1.0 EECS 780 laboratory outline L1.1 Motivation and overview L1.2 Wireshark installation and use L1.3 Protocol analysis and examples L1.4 Getting started 28 August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-21
22 Protocol Analysis with Wireshark Protocol Analysis Packets/protocols can be analyzed after capturing Individual fields in protocols can be easily seen Graphs and flow diagrams can be helpful in analysis 28 August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-22
23 Protocol Analysis and Examples Packet Details Pane Analysis is performed manually Example shows TCP segment with SYN and ACK fields set to 1 28 August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-23
24 Protocol Analysis and Examples Packet Byte Pane Zoom in or out is possible in main toolbar Packet Byte pane consists of offset, Hex, and ASCII fields 28 August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-24
25 Protocol Analysis and Examples Statistics Flow Graph Example TCP plots and flow graphs are available in Statistics menu 28 August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-25
26 Protocol Analysis with Wireshark Getting Started L1.0 EECS 780 laboratory outline L1.1 Motivation and overview L1.2 Wireshark installation and use L1.3 Protocol analysis and examples L1.4 Getting started 28 August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-26
27 Getting Started Installation and First Lab Exercise Install Wireshark and familiarise Get first Getting Started exercise student resources web page at or author Web site Complete first Wireshark Lab Getting Started follow EECS 780 submission instructions and report to grader cc to professor Subject: EECE780 - wireshark getting started attach file <lastname>-wireshark-getting-started.pdf 28 August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-27
28 Protocol Analysis with Wireshark Acknowledgements Some material in these foils comes from the textbook supplementary materials: Kurose & Ross, Computer Networking: A Top-Down Approach, 7th ed August 2017 KU EECS 780 Comm Nets Wireshark Lab NET-L1-28
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