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Ethereal/WireShark Tutorial

Ethereal/WireShark Tutorial. Yen-Cheng Chen IM, NCNU. WireShark. The Ethereal network protocol analyzer has changed its name to Wireshark. http://www.wireshark.org/ Download: http://www.wireshark.org/download.html Wireshark User's Guide http://www.wireshark.org/docs/wsug_html/.

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Ethereal/WireShark Tutorial

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  1. Ethereal/WireShark Tutorial Yen-Cheng Chen IM, NCNU

  2. WireShark • The Ethereal network protocol analyzer has changed its name to Wireshark. • http://www.wireshark.org/ • Download: • http://www.wireshark.org/download.html • Wireshark User's Guide • http://www.wireshark.org/docs/wsug_html/

  3. Introduction • A network protocol analyzer will try to capture network packets and tries to display that packet data as detailed as possible. • What will be captured • All packets that an interface can ”hear” • At your PC connected to a switch • Unicast (to and from the interface only) • Multicast, RIP, IGMP,… • Broadcast, e,g ARP,

  4.  menu  main toolbar  filter toolbar  packet list pane  packet details pane ipconfig /renew  packet bytes pane  status bar

  5. packet list pane

  6. Sort by source

  7. packet details pane

  8. packet bytes pane

  9. Filter

  10. Filter Expression ip.src == 10.32.11.220 && ip.dst == 163.22.32.101 ip.src eq 10.32.11.220 and ip.dst eq 163.22.32.101 ip.src == 10.32.11.220 || ip.src == 163.22.32.101 http && ( ip.src == 10.32.11.220 || ip.src == 163.22.32.101) !(ip.dst == 10.32.11.220)

  11. (ip.dst == 10.32.11.220) && (ip.src == 163.22.32.101)

  12. Follow TCP Stream

  13. Export

  14. No. Time Source Destination Protocol Length Info 950 10.693436 10.32.11.220 163.22.32.101 HTTP 613 GET /rnd/ HTTP/1.1 Frame 950: 613 bytes on wire (4904 bits), 613 bytes captured (4904 bits) Ethernet II, Src: Metallig_43:fd:08 (00:50:bf:43:fd:08), Dst: Cisco_74:e4:00 (00:1a:30:74:e4:00) Internet Protocol Version 4, Src: 10.32.11.220 (10.32.11.220), Dst: 163.22.32.101 (163.22.32.101) Transmission Control Protocol, Src Port: rdrmshc (1075), Dst Port: http (80), Seq: 559, Ack: 813, Len: 559 Source port: rdrmshc (1075) Destination port : (80) [Stream index:21] Sequence number : 559 (relative sequence number) [Next sequence number : 1118 (relative sequence number)] Acknowledgement number : 813 (relative ack number) Header length : 20 bytes Flags : 0x18 (PSH , ACK) window size value : 64723 [Calculated window size : 64723] [window size scaling factor : -2 (no window scaling used)] Checksum : 0x5306 [validation disabled] [SEQ/ACK analysis] Hypertext Transfer Protocol

  15. Capture Options

  16. Assignments • 5 layers • Ethernet II frame • 802.3 frame • Broadcast frame • Deadline: ?

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