How to use wireshark

How to use wireshark

wireshark developer

Wireshark is a network analyzer that allows you to see what is going on in your network.  It allows you to dissect your network packets at a microscopic level, giving you detailed information about individual packets.

Wireshark was first released in 1998 (and was then called Ethereal).  It can run on all major operating systems.  Most businesses and government organizations now prefer Wireshark as their standard network analyzer.

Wireshark is also completely open source, thanks to the community of network engineers around the world.  While most security tools are CLI-based, Wireshark comes with a fantastic user interface.

The Open Systems Interconnection (OSI) model standardizes how two or more devices connect to each other.  The OSI model segments the network architecture into 7 layers: application, presentation, session, transport, network, data link and physical.

Each packet contains valuable information about the devices involved in a packet transfer.  Each data transfer involves thousands or even millions of these data packets being sent between source and destination devices.

wireshark manual pdf

Wireshark is a protocol analysis tool that allows real-time capture of data packets and presents this information in a readable format for users. The traffic capture process is carried out through a network card, operating in a special mode designated promiscuous (possibility to capture all packets, regardless of the destination address).

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We hope you enjoyed this first tutorial on Wireshark. In addition to being able to see all traffic (encrypted and unencrypted), we can also understand how our data networks work. Today we can only wait for your comments and suggestions for the next tutorials.

One of the interesting features of Wireshark is Follow TCP Stream. This feature allows you to see complete TCP streams, that is, with this option, the user will be able to follow a complete communication from the first SYN to the FIN-ACK.

What are filters? As the name suggests, filters allow you to select, from a set of information, what you want. We can filter by protocol, network address, port, MAC address, etc. Here are some examples:

wireshark on linux

Wireshark, a network analysis tool formerly known as Ethereal, captures packets in real time and displays them in human-readable format. Wireshark includes filters, color coding and other features that allow you to drill down into network traffic and inspect individual packets.

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This tutorial will bring you up to speed with the basics of capturing packets, filtering and inspecting them. You can use Wireshark to inspect network traffic for a suspicious program, analyze traffic flow on your network or troubleshoot network problems.

You can download Wireshark for Windows or macOS from its official website. If you are using Linux or another UNIX-like system, you will probably find Wireshark in your package repositories. For example, if you are using Ubuntu, you will find Wireshark in the Ubuntu Software Center.

After downloading and installing Wireshark, you can start it and double-click on the name of a network interface under Capture to start capturing packets on that interface. For example, if you want to capture traffic on your wireless network, click on your wireless interface. You can configure advanced features by clicking Capture> Options, but this is not necessary at this time.

wireshark notes

This application makes use of libraries such as Libpcap and Winpcap in the Windows operating system, which do not provide adequate support for integration with wireless cards, making it can not properly capture traffic through wifi connections, although this limitation is not directly Wireshark but Windows as such, means a major problem that requires solution, which is why Wireshark offers support for Airpcap, which are special network adapters, although somewhat expensive.

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For a correct use in Windows we must solve the problem of wireless traffic, which can work by installing a driver that includes Acrylic WiFi, by installing one of its libraries called airpcap.dll, Wireshark automatically loads the library, so we can use this wonderful traffic control tool through any medium. In the Linux operating system does not present this type of problems, so we must install it from the console and then we just have to run and start implementing Wireshark.

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