Yoram Orzach is Experienced Instructor in the areas of IP technologies, network design, network analysis and optimization and network forensics, providing courses based on strong theoretical background and real-world case studies, based on many years of training and field experience world-wide.
Network Analysis Using Wireshark -Chapter 6- basic statistics toolsYoram Orzach
Yoram Orzach is Experienced Instructor in the areas of IP technologies, network design, network analysis and optimization and network forensics, providing courses based on strong theoretical background and real-world case studies.
By the end of this lesson, the participant will be able to:
▫ Understand the types of statistics tools available in Wireshark
▫ Perform network monitoring with these tools
Network analysis Using Wireshark 4: Capture FiltersYoram Orzach
• By the end of this lesson, the participant will be able to:
▫ Understand basic capture filters
▫ Perform basic capture filtering
Used to define which packets are going to be captured (be
careful!!!)
What are Capture Filters
• Wireshark uses the libpcap filter language for capture filters
Network analysis Using Wireshark Lesson 3: locating wiresharkYoram Orzach
L2/L3 network operation
Where to locate Wireshark
Taps and port-mirror
Local and remote monitoring
Capture data from multiple interfaces
Capture data on virtual machines
Yoram Orzach is Experienced Instructor in the areas of IP technologies, network design, network analysis and optimization and network forensics, providing courses based on strong theoretical background and real-world case studies, based on many years of training and field experience world-wide.
Network Analysis Using Wireshark Chapter 08 the expert systemYoram Orzach
Yoram Orzach is Experienced Instructor in the areas of IP technologies, network design, network analysis and optimization and network forensics, providing courses based on strong theoretical background and real-world case studies, based on many years of training and field experience world-wide.
Network Analysis Using Wireshark -10- arp and ip analysis Yoram Orzach
• By the end of this lesson, the participant will be able to:
▫ Understand ARP and IP
▫ Isolate and fix basic IP/ARP networking problems Yoram Orzach is Experienced Instructor in the areas of IP technologies, network design, network analysis and optimization and network forensics, providing courses based on strong theoretical background and real-world case studies, based on many years of training and field experience world-wide.
lesson 2- Network analysis Using Wireshark introduction to cellular feb-2017Yoram Orzach
• By the end of this lesson, the you will be able to:
▫ Understand the main menus and commands of Wireshark
▫ Start capturing data with the Wireshark software
▫ Configure basic parameters with Wireshark
Yoram Orzach is Experienced Instructor in the areas of IP technologies, network design, network analysis and optimization and network forensics, providing courses based on strong theoretical background and real-world case studies, based on many years of training and field experience world-wide.
Network Analysis Using Wireshark -Chapter 6- basic statistics toolsYoram Orzach
Yoram Orzach is Experienced Instructor in the areas of IP technologies, network design, network analysis and optimization and network forensics, providing courses based on strong theoretical background and real-world case studies.
By the end of this lesson, the participant will be able to:
▫ Understand the types of statistics tools available in Wireshark
▫ Perform network monitoring with these tools
Network analysis Using Wireshark 4: Capture FiltersYoram Orzach
• By the end of this lesson, the participant will be able to:
▫ Understand basic capture filters
▫ Perform basic capture filtering
Used to define which packets are going to be captured (be
careful!!!)
What are Capture Filters
• Wireshark uses the libpcap filter language for capture filters
Network analysis Using Wireshark Lesson 3: locating wiresharkYoram Orzach
L2/L3 network operation
Where to locate Wireshark
Taps and port-mirror
Local and remote monitoring
Capture data from multiple interfaces
Capture data on virtual machines
Yoram Orzach is Experienced Instructor in the areas of IP technologies, network design, network analysis and optimization and network forensics, providing courses based on strong theoretical background and real-world case studies, based on many years of training and field experience world-wide.
Network Analysis Using Wireshark Chapter 08 the expert systemYoram Orzach
Yoram Orzach is Experienced Instructor in the areas of IP technologies, network design, network analysis and optimization and network forensics, providing courses based on strong theoretical background and real-world case studies, based on many years of training and field experience world-wide.
Network Analysis Using Wireshark -10- arp and ip analysis Yoram Orzach
• By the end of this lesson, the participant will be able to:
▫ Understand ARP and IP
▫ Isolate and fix basic IP/ARP networking problems Yoram Orzach is Experienced Instructor in the areas of IP technologies, network design, network analysis and optimization and network forensics, providing courses based on strong theoretical background and real-world case studies, based on many years of training and field experience world-wide.
lesson 2- Network analysis Using Wireshark introduction to cellular feb-2017Yoram Orzach
• By the end of this lesson, the you will be able to:
▫ Understand the main menus and commands of Wireshark
▫ Start capturing data with the Wireshark software
▫ Configure basic parameters with Wireshark
Yoram Orzach is Experienced Instructor in the areas of IP technologies, network design, network analysis and optimization and network forensics, providing courses based on strong theoretical background and real-world case studies, based on many years of training and field experience world-wide.
Network Analysis Using Wireshark Jan 18- seminar Yoram Orzach
Lesson objective:
By the end of this lesson you will:
Get an approach to network troubleshooting
Understand the wireshark software
understand how to use wireshark for network protocols troubleshooting
Network analysis Using Wireshark Lesson 11: TCP and UDP AnalysisYoram Orzach
Network analysis Using Wireshark Lesson
By the end of this lesson, the participant will be able to:
▫ Understand UDP and TCP network behavior
▫ Understand TCP connectivity problems
▫ Understand how to use Wireshark for TCP troubleshooting
Network analysis Using Wireshark Lesson 12 - bandwidth and delay issuesYoram Orzach
Network analysis Using Wireshark Lesson 12
By the end of this lesson, the participant will be able to:
▫ Perform bandwidth and throughput tests
▫ Measure applications throughput
▫ Understand the impact of delay and jitter on network applications
Network analysis Using Wireshark Lesson 1- introduction to network troublesho...Yoram Orzach
Network analysis Using Wireshark
By the end of this lesson you will:
• Understand how to approach a network problem
• Understand the difference between GO-NOGO and
performance problems
• Understand the tools that assist us in the network
troubleshooting process
Yoram Orzach is Experienced Instructor in the areas of IP technologies, network design, network analysis and optimization and network forensics, providing courses based on strong theoretical background and real-world case studies, based on many years of training and field experience world-wide.
3.7.10 Lab Use Wireshark to View Network TrafficRio Ap
Skenario soal latihan lengkap Lab 3.7.10 dari materi Cisco CCNA 1 v7. Untuk mengetahui kegunaan wireshark dalam mengcapture dan menganalisa traffic jaringan. Di skenario ini menggunakan protocol ICMP yang dipakai pada saat melakukan perintah Ping dari command line interface windows 10.
For more classes visit
www.snaptutorial.com
Chapter 1-Questions
1-3: Discuss the relationship between network architecture and protocol
1-5: Define the following terms: protocol, connection-orientated protocols, connectionless protocols, and protocol stacks.
1-11: Briefly describe the seven layers of the OSI protocol hierarchy
For more classes visit
www.snaptutorial.com
Chapter 1-Questions
1-3: Discuss the relationship between network architecture and protocol
1-5: Define the following terms: protocol, connection-orientated protocols, connectionless protocols, and protocol
For more course tutorials visit
www.newtonhelp.com
Chapter 1-Questions
1-3: Discuss the relationship between network architecture and protocol
1-5: Define the following terms: protocol, connection-orientated protocols, connectionless protocols, and protocol stacks.
For more course tutorials visit www.newtonhelp.com
Chapter 1-Questions
1-3: Discuss the relationship between network architecture and protocol
1-5: Define the following terms: protocol, connection-orientated protocols, connectionless protocols, and protocol stacks.
Network Analysis Using Wireshark Jan 18- seminar Yoram Orzach
Lesson objective:
By the end of this lesson you will:
Get an approach to network troubleshooting
Understand the wireshark software
understand how to use wireshark for network protocols troubleshooting
Network analysis Using Wireshark Lesson 11: TCP and UDP AnalysisYoram Orzach
Network analysis Using Wireshark Lesson
By the end of this lesson, the participant will be able to:
▫ Understand UDP and TCP network behavior
▫ Understand TCP connectivity problems
▫ Understand how to use Wireshark for TCP troubleshooting
Network analysis Using Wireshark Lesson 12 - bandwidth and delay issuesYoram Orzach
Network analysis Using Wireshark Lesson 12
By the end of this lesson, the participant will be able to:
▫ Perform bandwidth and throughput tests
▫ Measure applications throughput
▫ Understand the impact of delay and jitter on network applications
Network analysis Using Wireshark Lesson 1- introduction to network troublesho...Yoram Orzach
Network analysis Using Wireshark
By the end of this lesson you will:
• Understand how to approach a network problem
• Understand the difference between GO-NOGO and
performance problems
• Understand the tools that assist us in the network
troubleshooting process
Yoram Orzach is Experienced Instructor in the areas of IP technologies, network design, network analysis and optimization and network forensics, providing courses based on strong theoretical background and real-world case studies, based on many years of training and field experience world-wide.
3.7.10 Lab Use Wireshark to View Network TrafficRio Ap
Skenario soal latihan lengkap Lab 3.7.10 dari materi Cisco CCNA 1 v7. Untuk mengetahui kegunaan wireshark dalam mengcapture dan menganalisa traffic jaringan. Di skenario ini menggunakan protocol ICMP yang dipakai pada saat melakukan perintah Ping dari command line interface windows 10.
For more classes visit
www.snaptutorial.com
Chapter 1-Questions
1-3: Discuss the relationship between network architecture and protocol
1-5: Define the following terms: protocol, connection-orientated protocols, connectionless protocols, and protocol stacks.
1-11: Briefly describe the seven layers of the OSI protocol hierarchy
For more classes visit
www.snaptutorial.com
Chapter 1-Questions
1-3: Discuss the relationship between network architecture and protocol
1-5: Define the following terms: protocol, connection-orientated protocols, connectionless protocols, and protocol
For more course tutorials visit
www.newtonhelp.com
Chapter 1-Questions
1-3: Discuss the relationship between network architecture and protocol
1-5: Define the following terms: protocol, connection-orientated protocols, connectionless protocols, and protocol stacks.
For more course tutorials visit www.newtonhelp.com
Chapter 1-Questions
1-3: Discuss the relationship between network architecture and protocol
1-5: Define the following terms: protocol, connection-orientated protocols, connectionless protocols, and protocol stacks.
For more course tutorials visit
www.tutorialrank.com
Chapter 1-Questions
1-3: Discuss the relationship between network architecture and protocol
1-5: Define the following terms: protocol, connection-orientated protocols, connectionless protocols, and protocol stacks.
1-11: Briefly describe the seven layers of the OSI protocol hierarchy
Chapter 1-Questions
1-3: Discuss the relationship between network architecture and protocol
1-5: Define the following terms: protocol, connection-orientated protocols, connectionless protocols, and protocol stacks.
20 questions , multiple choiceQuestion 11.Which of the fol.docxvickeryr87
20 questions , multiple choice
Question 1
1.
Which of the following statements is true?
[removed]
The Wireshark protocol analyzer has limited capabilities and is not considered multi-faceted.
[removed]
Wireshark is used to find anomalies in network traffic as well as to troubleshoot application performance issues.
[removed]
Both Wireshark and NetWitness Investigator are expensive tools that are cost-prohibitive for most organizations.
[removed]
NetWitness Investigator is available at no charge while Wireshark is a commercial product.
5 points
Question 2
1.
Wireshark capture files, like the DemoCapturepcap file found in this lab, have a __________ extension, which stands for packet capture, next generation.
[removed]
.packcng
[removed]
.paccapnextg
[removed]
.pcnextgen
[removed]
.pcapng
5 points
Question 3
1.
The Wireless Toolbar (View > Wireless Toolbar) is used only:
[removed]
when using a pre-captured file.
[removed]
when capturing live traffic.
[removed]
when reviewing wireless traffic.
[removed]
in a virtual lab environment.
5 points
Question 4
1.
In the frame detail pane, which of the following was a field unique to wireless traffic, confirming that it is a wireless packet?
[removed]
The Encapsulation type: Per-Packet Information header
[removed]
The Arrival time: May 11, 2007 15:30:37 041165000 Pacific Daylight Time
[removed]
The Capture Length: 181 bytes
[removed]
The Epoch Time: 1178922637.041165000 seconds
5 points
Question 5
1.
Which of the following tools provides information about the antennae signal strengths, noise ratios, and other antennae information during a captured transmission?
[removed]
Windows Explorer
[removed]
DemoCapture
[removed]
Wireshark
[removed]
NetWitness
5 points
Question 6
1.
Which of the following can be used to map who is able to communicate with whom, the measured strength of signals, and what frequencies are used, as well as be used for jamming certain frequencies and for determining which devices were likely used to set off remote bombs and Improvised Explosive Devices (IEDs)?
[removed]
MAC+PHY (MAC and Physical Layer)
[removed]
IEEE Layer
[removed]
Flags fields
[removed]
Quality of Service information
5 points
Question 7
1.
In the IEEE 802.11 Quality of Service information and Flags fields, Wireshark displays information about the __________, which enables the network administrator to determine which Media Access Control (MAC) addresses match each of them.
[removed]
antennae and signal strength
[removed]
transmitters and receivers of the data
[removed]
payload and frame information
[removed]
Domain System and Internet Protocol version
5 points
Question 8
1.
In the lab, Wireshark displayed the transmitter/receiver address in both full hexadecimal (00:14:a5:cd:74:7b) and a kind of shorthand, which was:
[removed]
IEEE 802.11.
[removed]
GemtekTe_IEEE.
[removed]
GemtekTe_00:14:a5.
[removed]
GemtekTe_cd:74:7b.
5 points
Question 9
1.
Matching th.
Wireshark tool has been a staple favourite of cybersecurity engineers for reasons more than one. This open-source network analyser helps in packet sniffing, troubleshooting network problems, and investigating security incidents. If you want to know more about Wireshark this blog here is perfect for you since it offers a detailed account of the major features of the tool. Alongside, the blog also talks about the interfaces supported by Wireshark and its multiple benefits. You will even get to know about the top competitors of the tool from this article.
Question 1 Which of the following statements is true regarding Wir.docxJUST36
Question 1
Which of the following statements is true regarding Wireshark?
[removed]
Wireshark is probably the most widely used packet capture and analysis software in the world.
[removed]
The expense of Wireshark makes it cost-prohibitive for most organizations.
[removed]
Compared to similar commercial products, Wireshark has the most sophisticated diagnostic tools.
[removed]
Wireshark saves frame details in a format that is incompatible and unusable by other software tools.
5 points
Question 2
The main screen of Wireshark includes several shortcuts. Which shortcut category displays a list of the network interfaces, or machines, that Wireshark has identified, and from which packets can be captured and analyzed?
[removed]
Capture Help
[removed]
Capture
[removed]
Files
[removed]
Online
5 points
Question 3
Which of the following enables Wireshark to capture packets destined to any host on the same subnet or virtual LAN (VLAN)?
[removed]
Capture Help
[removed]
Host mode
[removed]
Subnet mode
[removed]
Promiscuous mode
5 points
Question 4
The top pane of the Wireshark window, referred to as the __________, contains all of the packets that Wireshark has captured, in time order, and provides a summary of the contents of the packet in a format close to English.
[removed]
byte summary
[removed]
byte data
[removed]
frame detail
[removed]
frame summary
5 points
Question 5
The middle pane of the Wireshark window, referred to as the __________, is used to display the packet structure and contents of fields within the packet.
[removed]
byte summary
[removed]
byte data
[removed]
frame detail
[removed]
frame summary
5 points
Question 6
The bottom pane of the Wireshark window, referred to as the __________, displays all of the information in the packet in hexadecimal and in decimalwhen possible.
[removed]
byte summary
[removed]
byte data
[removed]
frame detail
[removed]
frame summary
5 points
Question 7
Wireshark can be used in a variety of ways, however the most common configuration for Wireshark, and the configuration that you ran in the lab, has the software running:
[removed]
in a peer-to-peer configuration.
[removed]
from a probe or hub.
[removed]
on a local area network.
[removed]
on a local host.
5 points
Question 8
In the simplest terms, Wireshark is used to capture all packets:
[removed]
from a computer workstation to the Wireshark application window.
[removed]
to and from a computer workstation and the Wireshark application window.
[removed]
to and from a computer workstation and the server.
[removed]
to and from the Wireshark Network Analyzer and the Capture section of the Wireshark application window.
5 points
Question 9
Which of the following statements is true regarding how Wireshark works?
[removed]
Where packets are captured and how they are captured does not have any impact on how the packets are analyzed.
[removed]
By running the Wireshark software on the same computer that g ...
Wireshark course, Ch 02: Introduction to wiresharkYoram Orzach
This chapter introduces the very basics of Wireshark - how to start packet capture, where to locate it in the network and how to configure basic operations. In chapter 3 we will learn how to configure capture and display filters.
Optimize your online presence as an interior designer in Delhi with tailored SEO strategies. Elevate visibility on search engines, ensuring your design prowess reaches the right audience. Craft engaging content that resonates with local clientele, incorporating relevant keywords and metadata. Harness the power of local SEO techniques to dominate search results, driving organic traffic and inquiries. Stay ahead in Delhi's competitive market by fine-tuning your digital footprint with effective SEO practices.
Sustainable Solutions for Chemical Waste Disposal by Summerland Environmental...Summerland Environmental
Welcome to the presentation on Sustainable Solutions for Chemical Waste Disposal by Summerland Environmental. We will explore innovative methods and technologies for eco-friendly waste management.
Emmanuel Katto Uganda - A PhilanthropistMarina Costa
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Merchants from high-risk industries face significant challenges due to their industry reputation, chargeback, and refund rates. These industries include sectors like gambling, adult entertainment, and CBD products, which often struggle to secure merchant accounts due to increased risks of chargebacks and fraud.
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Discover How Long Do Aluminum Gutters Last?SteveRiddle8
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Unlocking Business Potential: Democratizing AI and Navigating Generative AI i...RNayak3
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Bridging the Language Gap The Power of Simultaneous Interpretation in Rwanda
Network Analysis using Wireshark 5: display filters
1. Network Analysis Using Wireshark Version 2Network Analysis using Wireshark V.2 yoram@ndi-com.com
Network analysis using Wireshark V2 yoram@ndi-com.comPage 1
Network analysis Using Wireshark
Lesson 5:
Display Filters
2. Network Analysis Using Wireshark Version 2Network Analysis using Wireshark V.2 yoram@ndi-com.com
Network analysis using Wireshark V2 yoram@ndi-com.comPage 2
• By the end of this lesson, the participant will be able to:
▫ Understand basic display filters
▫ Perform basic packet filtering
Lesson Objectives
3. Network Analysis Using Wireshark Version 2Network Analysis using Wireshark V.2 yoram@ndi-com.com
Network analysis using Wireshark V2 yoram@ndi-com.comPage 3
yoram@ndi-com.com
For More lectures, Courses & Keynote Speaking
Contact Me to:
4. Network Analysis Using Wireshark Version 2Network Analysis using Wireshark V.2 yoram@ndi-com.com
Network analysis using Wireshark V2 yoram@ndi-com.comPage 4
Ways to configure display filters
Simple and structured filters
Focusing on protocol and text strings
Filter macros
Case studies
The dfilters file
Lesson Content
“Wine is constant proof that God loves
us and loves to see us happy.”
Benjamin Franklin
5. Network Analysis Using Wireshark Version 2Network Analysis using Wireshark V.2 yoram@ndi-com.com
Network analysis using Wireshark V2 yoram@ndi-com.comPage 5
Configure Display Filters
To open display
filters menu click
here
6. Network Analysis Using Wireshark Version 2Network Analysis using Wireshark V.2 yoram@ndi-com.com
Network analysis using Wireshark V2 yoram@ndi-com.comPage 6
Another way to Use Display Filters
4. Manage
saved filters
1. Add filter
expression
3. Select from
previously used
filters
2. Apply filter
string
7. Network Analysis Using Wireshark Version 2Network Analysis using Wireshark V.2 yoram@ndi-com.com
Network analysis using Wireshark V2 yoram@ndi-com.comPage 7
Another way to Use Display Filters
8. Network Analysis Using Wireshark Version 2Network Analysis using Wireshark V.2 yoram@ndi-com.com
Network analysis using Wireshark V2 yoram@ndi-com.comPage 8
• Apply a filter from the packet itself:
From the Packet Itself
9. Network Analysis Using Wireshark Version 2Network Analysis using Wireshark V.2 yoram@ndi-com.com
Network analysis using Wireshark V2 yoram@ndi-com.comPage 9
Ways to configure display filters
Simple and structured filters
Focusing on protocol and text strings
Filter macros
Case studies
The dfilters file
Lesson Content
“Well done is better than well said”
Benjamin Franklin
10. Network Analysis Using Wireshark Version 2Network Analysis using Wireshark V.2 yoram@ndi-com.com
Network analysis using Wireshark V2 yoram@ndi-com.comPage 10
• Display filters allow you to concentrate on the packets you
are interested in while hiding the currently uninteresting
ones. They allow you to select packets by:
▫ Protocol
▫ The presence of a field
▫ The values of fields
• When using a display filter, all packets remain in the capture
file. The display filter only changes the display of the capture
file but not its content!
Details
11. Network Analysis Using Wireshark Version 2Network Analysis using Wireshark V.2 yoram@ndi-com.com
Network analysis using Wireshark V2 yoram@ndi-com.comPage 11
Filter Comparison Operators
Frame.len <= 0x20
Frame.len ge 0x100
Frame.len < 1518
Frame.len > 64
Ip.src != 10.1.1.5
Ip.src == 10.1.1.5
Example
Less then or equal to<=le
Greater then or equal to>=ge
Less Than<lt
Greater than>gt
Not equal!=ne
Equal==eq
DescriptionC-LikeShortcut
12. Network Analysis Using Wireshark Version 2Network Analysis using Wireshark V.2 yoram@ndi-com.com
Network analysis using Wireshark V2 yoram@ndi-com.comPage 12
• There are several types of filter fields:
▫ Unsigned/asigned integer (8-bit, 16-bit, 24-bit, 32-bit)
▫ Boolean
▫ Ethernet address (6 bytes)
▫ IPv4 address
▫ IPv6 address
Display Filter Field Types
13. Network Analysis Using Wireshark Version 2Network Analysis using Wireshark V.2 yoram@ndi-com.com
Network analysis using Wireshark V2 yoram@ndi-com.comPage 13
• You can express integers in decimal, octal, or hexadecimal. The
following display filters are equivalent:
▫ Decimal:
ip.len le 1500
▫ Octal:
ip.len le 02734
▫ Hexadecimal:
ip.len le 0x5DC
Unsigned/Assigned integer
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• A boolean field is present in the protocol decode only if its value is
true.
▫ For example, tcp.flags.syn is present, and thus true, only if the SYN flag is
present in a TCP segment header.
• Thus the filter expression tcp.flags.syn will select only those packets
for which this flag exists, that is, TCP segments where the segment
header contains the SYN flag.
Boolean
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• Separators can be a colon (:), dot (.) or dash (-) and can have one
or two bytes between separators
• Examples:
▫ eth.dst == ff:ff:ff:ff:ff:ff
▫ eth.dst == ff-ff-ff-ff-ff-ff
▫ eth.dst == ffff.ffff.ffff
Ethernet address (6 bytes)
Byte
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• The common filter will be:
▫ ip.addr == 192.168.0.1
• Classless InterDomain Routing (CIDR) notation can be used to
test if an IPv4 address is in a certain subnet.
• For example, this display filter will find all packets in the 129.111
Class-B network:
▫ ip.addr == 129.111.0.0/16
IPv4 address
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• IPv6 filters examples:
▫ ipv6.addr == ::1
▫ ipv6.addr == 2041:0000:130F:0000:0000:09C0:876A:130B
▫ ipv6.addr == 2053:0:130f::9c2:876a:130b
▫ ipv6.addr == ::
IPv6 address
YYYY:YYYY:YYYY:YYYY:YYYY:YYYY:YYYY:YYYY
16bitY = 0 to F
• IPv6 address structure:
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Combining Expressions
not arp and not dns
eth.dst[0:3] == 0.6.29 xor
eth.src[0:3] == 0.6.29
ip.src == 10.0.0.5 or ip.src ==
192.1.1.1
ip.src == 10.0.0.5 and tcp.flags.fin
Example
Logical NOT!not
Logical XOR^^xor
Logical OR||or
Logical AND&&and
DescriptionC-LikeShortcut
Syntax: Primitive and Primitive and not primitive
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• Wireshark allows you to test a field for membership in a
set of values or fields.
• After the field name, use the in operator followed by the
set items surrounded by braces {}.
▫ tcp.port in {80 443 8080}
• This can be considered a shortcut operator, as the
previous expression could have been expressed as:
▫ tcp.port == 80 || tcp.port == 443 || tcp.port == 8080
Membership Operators
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Ways to configure display filters
Simple and structured filters
Focusing on protocol and text strings
Filter macros
Case studies
The dfilters file
Lesson Content
“By failing to prepare, you are preparing
to fail.”
Benjamin Franklin
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• Wireshark allows you to select subsequences of a sequence in rather
elaborate ways.
• This is written by writing a parameter to check and then place a pair of
brackets [] containing a (:) or (-) separated list of range specifiers.
• [n:m] or [n-m] ] will display the m bytes in offset n
Substring Operators
00 8300 00 D8BC
00 8300 00 D8BC
00 8300 00 D8BC
20 8320 00 D8BC
eth.src[0:3] == 00:00:83
eth.src[1:2] == 00:83
eth.src[0:4] == 00:00:83:00
eth.src[4:2] == BC:D8
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Ways to configure display filters
Simple and structured filters
Focusing on protocol and text strings
Filter macros
Case studies
The dfilters file
Lesson Content
“It takes many good deeds to build a good
reputation, and only one bad one to lose it.”
Benjamin Franklin
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• Display filters macros are used to create shortcuts for complex
display filters that you can configure once and use later.
Filter Macros
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• In order to configure a macro, you give it a name, and you fill in
the text box with the filter string.
• In order to activate the macro, you simply write:
▫ $(macro_name:parameter1;paramater2;parameter3 …)
• Let’s configure a simple filter name test01 that takes the following
parameters as values:
▫ ip.addr == <value> and
▫ tcp.port == <value>
Filter Macros
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• This will be a filter that looks for packets from specific network that
goes to http port.
• A macro that takes these two parameters would be:
▫ ip.addr==$1 && tcp. port==$2
• Now, in order to get the filter results for parameters
▫ ip.addr == 10.0.0.4 and
▫ tcp.port == 80
• We should write in the display window bar the string:
▫ ${test01:10.0.0.4;80}
Filter Macros
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Ways to configure display filters
Simple and structured filters
Focusing on protocol and text strings
Filter macros
Case studies
The dfilters file
Lesson Content
“Anyone who doesn't believe in miracles is
not a realist.”
David Ben-Gurion
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• Port mirror to be configured from
the laptop, to
▫ The Server port or
▫ The PC port
Example #1:
Filter Traffic Between Hosts
SDSDSD
172.16.100.111
172.16.100.12
ip.addr==172.16.100.111 and ip.addr==172.16.100.12
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• Port mirror to be configured from the laptop, to
the router port
Example #2:
Filter Traffic from Specific Network
To ISP
192.168.1.0/24
192.168.1..0/24
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Example #3:
Filtering ICMP
icmp
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Example #4 – Filtering Mail Traffic
tcp.port == 110
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Example #5 - DCERPC
DCERPC
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Example #6 - Retransmissions
tcp.analysis.retransmission
1
2
3
4
3
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Example #7 – Zero Window
tcp.analysis.zero_window
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Ways to configure display filters
Simple and structured filters
Focusing on protocol and text strings
Filter macros
Case studies
The dfilters file
Lesson Content
Education is what remains after one has
forgotten what one has learned in school.
Albert Einstein
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The dfilters File
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Summary
• In this lesson we talked about:
▫ Basic display filters configuration
▫ Complex display filters and display filters macro’s
Thanks for your time
Yoram Orzach
yoram@ndi-com.com
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