practical packet analysis using wireshark to solve real world network problems phần 1 doc

... Torrential Downfall 11 1 What We Know 11 1 Tapping into the Wire 11 1 Analysis 11 2 Summary 11 3 POP Goes the Email Server 11 4 What We Know 11 4 Tapping into the Wire 11 4 Analysis 11 4 Summary 11 5 Here’s Something ... 10 6 Double Vision 10 7 What We Know 10 7 Tapping into the Wire 10 7 Analysis 10 7 Summary 10 9 Did That Server Flash Me? 10 9 What We Know 10 9 Tappi...

Ngày tải lên: 14/08/2014, 14:20

... 208 10 .10 0 .1. 1 10 .10 0 .1. 100 19 2 .16 8.0 .1 192 .16 8.0.2 19 2 .16 8.0.3 19 2 .16 8.0.4 19 2 .16 8.0.5 19 2 .16 8.0.6 19 2 .16 8.0.7 19 2 .16 8.0.8 19 2 .16 8.0.9 10 .10 0 .1. 150 19 2 .16 8.0.50 19 2 .16 8.0. 51 192 .16 8.0.52 19 2 .16 8.0.53 19 2 .16 8.0.54 19 2 .16 8.0.55 19 2 .16 8.0.56 19 2 .16 8.0.57 19 2 .16 8.0.58 Packet Analysis ... small network Oa...

Ngày tải lên: 14/08/2014, 14:20

... Captured Packets 41 Figure 4-2: Comparison of a marked packet to an unmarked packet. They will be highlighted in different colors on your screen. In this example, packet 1 is marked. To mark a packet, ... the Packet List pane and choose Mark Packet from the pop-up. Or, single click a packet in the Packet List pane and press CTRL-M to mark it. To unmark a packet, t...

Ngày tải lên: 14/08/2014, 14:20

... packet 2 of the example file. ACK Packet Seq # 222222222 Ack # 11 111 111 2 SYN Packet Seq # 11 111 111 1 Ack # 0 SYN Packet Seq # 11 111 111 2 Ack # 222222223 Client Server 64 Chapter 6 TCP/IP and HTTP http.pcap TCP/IP ... and the Wireshark program. In order for a protocol to be supported by Wireshark, it must have a dissector built into it. Wireshark uses several dissecto...

Ngày tải lên: 14/08/2014, 14:20

... solving, 10 4 from Gnutella network, 11 5 11 9 new computers and, 10 7 10 9 from peer -to- peer file transfer service, 11 1 11 3 traceroute utility for evaluating, 10 4 10 6 and website access issues, 10 9 11 1 slowdownload.pcap ... attempts, 14 8 15 0 filters specific to, 14 5 14 8 signal interference, 13 6 sniffing in Linux, 14 1 14 2 in Windows, 13 8 14 0 one channel at a tim...

Ngày tải lên: 14/08/2014, 14:20

... First Packet Capture In order to get packet data into Wireshark, you’ll perform your first packet capture. You may be thinking, “How am I going to capture packets when nothing is wrong on the network? ” ... Wireshark web page links directly to several forms of support, including online documentation, Tapping into the Wire 25 Figure 2 -11 : A computer on network D can’t...

Ngày tải lên: 14/08/2014, 14:20

... goal is to find out why Beth’s computer is unable to connect to the Internet and then fix the problem. Packet 1 More Fragments = 1 Offset = 0 Packet 2 More Fragments = 1 Offset = 14 80 Packet ... ceases. Common Protocols 73 Following this handshake, the first MSNMS packet is sent from 19 2 .16 8.0 .11 4 to a server residing outside of your local network (Figure 6-2...

Ngày tải lên: 14/08/2014, 14:20

... between Erin’s computer, 24.4.97.2 51, and the remote webserver, 216 .23 .16 8 .11 4, as shown in Figure 7- 21. 8 FIGHTING A SLOW NETWORK As a network administrator, much of your time will be spent ... SYN packet to the remote server, 19 2 .16 8.0 .18 2. However, the server does not respond, so the client issues two more SYN packets to try and establish communication. Fighti...

Ngày tải lên: 14/08/2014, 14:20

... traffic to a printer looks like. As you can see in Figure 9-3, our server, 10 .10 0 .16 .15 , is receiving a massive influx of SPOOLS packets from a client within our network, 10 .10 0 .17 .47. 11 8 Chapter ... are quite a few packets traveling between 10 .10 0.25 .14 (the local machine) and 10 .10 0 .18 .12 (a remote computer). When you take a closer look at these packets, you wil...

Ngày tải lên: 14/08/2014, 14:20

... music! Security-based Analysis 13 1 Tapping into the Wire Some hackers want to capture the passwords of network administrators to gain administrative access to a network. Others simply want to bring a network to ... Type The two options here are 802 .11 Only and 802 .11 + Radio. The 802 .11 Only option includes the standard 802 .11 packet header on all capture packets....

Ngày tải lên: 14/08/2014, 14:20