practical packet analysis using wireshark to solve real world network problems phần 2 docx
practical packet analysis using wireshark to solve real world network problems phần 2 docx
... small
network
Oak Street
Vine Street
Dogwood Lane
501 5 02 503 504
505 506 507 508
20 1 20 2 20 3 20 4
20 5 20 6 20 7 20 8
10.100.1.1
10.100.1.100
1 92. 168.0.1
1 92. 168.0 .2
1 92. 168.0.3
1 92. 168.0.4
1 92. 168.0.5
1 92. 168.0.6
1 92. 168.0.7
1 92. 168.0.8
1 92. 168.0.9
10.100.1.150
1 92. 168.0.50
1 92. 168.0.51
1 92. 168.0. 52
1 92. 168.0.53
1 92. 168.0.54
1 92. 168.0.55
1 92...
practical packet analysis using wireshark to solve real world network problems phần 4 docx
... 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 ... 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...
practical packet analysis using wireshark to solve real world network problems phần 1 doc
... into the Wire 125
Analysis 125
Summary 127
Blaster Worm 127
What We Know 127
Tapping into the Wire 127
Analysis 127
Summary 128
Covert Information 129
What We Know 129
Tapping into the Wire 129
Analysis ... 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...
practical packet analysis using wireshark to solve real world network problems phần 3 ppt
... 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? ” ... computers connected
to that hub. As illustrated in Figure 2- 2, your visibility window is limitless
when your sniffer is connected to a hub network.
Packet Sniffer
I...
practical packet analysis using wireshark to solve real world network problems phần 5 doc
... packet 2 of the example file.
ACK Packet
Seq # 22 222 222 2
Ack # 1111111 12
SYN Packet
Seq # 111111111
Ack # 0
SYN Packet
Seq # 1111111 12
Ack # 22 222 222 3
Client Server
64 Chapter 6
TCP/IP and HTTP
http.pcap
TCP/IP ... packet s
sequence number and uses that number in the packet it returns. The response
packet is called a SYN/ACK packet, and it is seen in packet 2...
practical packet analysis using wireshark to solve real world network problems phần 6 ppt
...
in response to your ping.
80 Chapter 7
Figure 7-5: A standard ping request from 10 .2. 10 .2 to 10.4.88.88
Examining packet 2 in Figure 7-6, you can see that it too is not a type 0
packet, but ...
(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...
practical packet analysis using wireshark to solve real world network problems phần 7 pdf
... hand-
shake between Erin’s computer, 24 .4.97 .25 1, and the remote webserver,
21 6 .23 .168.114, as shown in Figure 7 -21 .
8
FIGHTING A SLOW NETWORK
As a network administrator, much of your
time will be ... 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...
practical packet analysis using wireshark to solve real world network problems phần 8 ppt
... All packets are received
without unusual delays until packet 28 . We’re in the middle of an HTTP trans-
action when suddenly there is a 9-second lag between packets 27 and 28 .
In the world of network ... know
enough to turn our attention to the router’s configuration to learn more
about the problem.
Security-based Analysis 123
As you can see in Figure 9 -2, there are q...
practical packet analysis using wireshark to solve real world network problems phần 9 potx
... passwords of network administrators to gain
administrative access to a network. Others simply want to bring a network to
its knees. In this case we want to access a router on the network and ... 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 a display filter...
practical packet analysis using wireshark to solve real world network problems phần 10 doc
... Resolution Protocol (ARP),
21 , 62
broadcast, 62, 80
cache poisoning, 20 24 , 92 93
using Cain & Abel, 21 24 , 131
for converting Layer 2 MAC
addresses, 52
packets, 93
gratuitous, 93
filtering ... 146
C
C:\WINNT\System 32 directory, network
packet referencing, 128
CACE Technologies, 138
Cain & Abel, 21 24 , 151
for ARP cache poisoning, 131
Sniffer tab, 22
CAL packet...