practical packet analysis using wireshark to solve real world network problems phần 7 pdf

... not really resulted in much of interest to us—that is, until packet number 3 57, shown in Figure 7- 34. Figure 7- 34: Packet 3 57 is a DCEPRC packet initiated by a host outside of our network. Packet ... set up, the next packet of interest is packet 1 47, shown in Figure 7- 30. Figure 7- 30: Packet 1 47 is a messenger packet. We need to investigate this further. Th...

Ngày tải lên: 14/08/2014, 14:20

... FTP 88 What We Know 88 Tapping into the Wire 88 Analysis 88 Summary 90 PRACTICAL PACKET ANALYSIS Using Wireshark to Solve Real- World Network Problems by Chris Sanders San Francisco ® xvi Acknowledgments accomplishment ... scenarios. Practical Packet Analysis shows you how to: • Use packet analysis to tackle common network problems, such as loss of con...

Ngày tải lên: 14/08/2014, 14:20

... the packet level, the more we can control our network and solve problems. This is the world of packet analysis. This book dives into the world of packet analysis headfirst. You’ll learn what packet ... able to imple- ment advanced packet analysis techniques that will help you solve even the most difficult problems in your own network. What Is Packet Anal...

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... 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? ” ... understanding of packet sniffer placement in a variety of different network topologies. We will look at various real- world network setups as we determine the best...

Ngày tải lên: 14/08/2014, 14:20

... 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, toggle this setting off using ... File As dialog allows you to save your packet captures. Working with Captured Packets 45 Figure 4 -7: A packet with the packet time reference toggle enabled NOTE Setting a pa...

Ngày tải lên: 14/08/2014, 14:20

... 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 dissectors in unison to interpret each packet. ... want to forgo the name resolution feature in order to conserve system resources. Protocol Dissection A protocol dissector allows Wireshark to break down a protocol (ICMP, for exa...

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... (bethscomputer.pcap) to see if we can find the problem. It shouldn’t take too long to realize that something is definitely wrong here. As shown 74 Chapter 6 Packet 9 is the last packet to be sent to fully ... 10.3 .71 .7 SYN ACK ACK Retransmission ACK Retransmission ACK Retransmission ACK Retransmission ACK Retransmission 7 BASIC CASE SCENARIOS Now we’ve arrived at the real...

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... workstation to monopolize all of the company’s Internet traffic. This case reminds us that when doing analysis, it is common to want to use some of the more advanced features to try to quickly solve ... router on a network. An edge router sits on the network and connects that network to the outside world. Tapping into the Wire Because the edge router handles all traf...

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... music! Security-based Analysis 131 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 ... Client (Monitoring) Monitor Mode 126 Chapter 9 Figure 9 -7: Packet 10 shows an attempt to log in to the admin account. This is a great opportunity to use...

Ngày tải lên: 14/08/2014, 14:20

... to show you how to use it in real- world scenarios. Practical Packet Analysis shows you how to: • Use packet analysis to tackle common network problems, such as loss of connectivity, slow networks, ... the hood of your network? Practical Packet Analysis shows how to use Wireshark to capture and then analyze packets as you take an in- depth look at real-...

Ngày tải lên: 14/08/2014, 14:20