1. Network Analyzer :- Introduction to Wireshark

2. What is Wireshark ? Ethereal Formerly known as Ethereal GUINetwork Protocol Analyzer Wireshark is a GUI Network Protocol Analyzer Display filters Display filters in Wireshark are very powerful pcap library Follows the rules of the pcap library

3. Functions Capturing network traffic Decodes packets of common protocols Displays the network traffic in human- readable format

4. Wireshark Startup Version 1.2.6

5. Screen Layout of Wireshark The summary line, briefly describing what the packet is. A protocol tree is shown, allowing you to drill down to exact protocol or field that you interested in. a hex dump shows you exactly what the packet looks like when it goes over the wire. Filename Of Current File

6. Edit -> Preferences ->Columns

7. Enable Protocols

8. Capture Options

9. To Specify the interface to be monitored To Record all traffic even not for you Only Capture part of the packet To Store the result in file Automatic Stop Condition To Start Monitoring Only Capture certain packet

10. Start Capturing

11. Stop Capturing

12. Display Packet Captured Frame # Ethernet Header Destination Mac Address Field in Ethernet Header

13. Column Sorting Output is Sorted By Frame No By Default Output is Sorted By Source Address

14. Conversation List

15. Saving Packets Captured

16. Capture Filters pcap library The capture filter syntax follows the rules of the pcap library This syntax is different from the display filter syntax. Referring manual page of tcpdump (http://www.tcpdump.org/tcpdump_man.html )http://www.tcpdump.org/tcpdump_man.html Sample filters: ◦ Capture only traffic to or from IP address 172.18.5.4: ◦ host 172.18.5.4

17. Capture Filters Capture traffic to or from a range of IP addresses: ◦ net 192.168.0.0/24 Capture traffic from a range of IP addresses: ◦ src net 192.168.0.0/24 Capture traffic to a range of IP addresses: ◦ dst net 192.168.0.0/24 For more information please visit http://wiki.wireshark.org/CaptureFilters http://wiki.wireshark.org/CaptureFilters

18. Display Filters C-like symbols, or through English-like abbreviations: eq, == Equal ne, != Not equal gt, > Greater than lt, < Less Than ge, >= Greater than or Equal to le, <= Less than or Equal to

19. Display Filters GUI Quick Way to Learn Display Filter Commands

20. Display Filters GUI 1. 2. 3.

21. Display Filters GUI

22. Why Packet Analyzing in this class ? Useful in Developing Network Application As a guideline when error encountered

23. Some Useful Information Wireshark - http://www.wireshark.orghttp://www.wireshark.org TCPDUMP MAN Page - http://www.tcpdump.org/tcpdump_man.htmlhttp://www.tcpdump.org/tcpdump_man.html IP Protocol - http://www.networksorcery.com/enp/protocol/ip.htmhttp://www.networksorcery.com/enp/protocol/ip.htm

24. Demonstration