practical packet analysis using wireshark to solve real world network problems phần 6 ppt

... CAL packets, as shown in Figure 6- 26. CAL packets are sent from the computer inside your network to an MSN server in order to establish communication with another MSNMS user. Figure 6- 26: CAL ... ceases. Common Protocols 73 Following this handshake, the first MSNMS packet is sent from 192. 168 .0.114 to a server residing outside of your local network (Figure 6- 24). Figu...

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? ” ... 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

... to a routing problem. Packet 1: Packet 2: 1 06 Chapter 8 Applying our newfound knowledge of TTL to our current situation, we can immediately see a problem with the first packet sent. This packet ... 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 featu...

Ngày tải lên: 14/08/2014, 14:20

... into the Wire 86 Analysis 87 Summary 88 Inbound 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 ... Window 59 6 COMMON PROTOCOLS 61 Address Resolution Protocol 62 Dynamic Host Configuration Protocol 62 TCP/IP and HTTP 64 TCP/IP 64 Establishing the Ses...

Ngày tải lên: 14/08/2014, 14:20

... 208 10.100.1.1 10.100.1.100 192. 168 .0.1 192. 168 .0.2 192. 168 .0.3 192. 168 .0.4 192. 168 .0.5 192. 168 .0 .6 192. 168 .0.7 192. 168 .0.8 192. 168 .0.9 10.100.1.150 192. 168 .0.50 192. 168 .0.51 192. 168 .0.52 192. 168 .0.53 192. 168 .0.54 192. 168 .0.55 192. 168 .0. 56 192. 168 .0.57 192. 168 .0.58 Packet Analysis ... the packet level, the more we can control our network and so...

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 ... only marked packets when saving packet captures.) There are several reasons you may want to mark a packet, including being able to save those packets separately, or to be a...

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...

Ngày tải lên: 14/08/2014, 14:20

... with Wireshark, packet analysis, and network troubleshooting in general. The rest of the book will be written in much the same format but will focus on different areas of real- world packet analysis. 100 ... your network. Summary Packet analysis is often a great tool to use when you must prove that you actually do know what you’re doing. Not only do you sometimes have...

Ngày tải lên: 14/08/2014, 14:20

... 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 1 26 Chapter 9 Figure 9-7: Packet 10 shows an attempt to log in to the admin account. This is a great opportunity to us...

Ngày tải lên: 14/08/2014, 14:20

... Configuration Protocol), 62 63 Discover packet, 63 Offer packet, 63 dhcp.pcap file, 62 dialog, 5 dictionary attack, 1 26 Discover packet (DHCP), 63 Display Filter dialog, 49–50 display filters, 46 using ... 68 69 Dynamic Host Configuration Protocol (DHCP), 62 63 File Transfer Protocol (FTP), 69 –71 filter expression syntax for, 48 and flow control, 4 Hypertext Transfe...

Ngày tải lên: 14/08/2014, 14:20