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Channel: Andrey Sozykin

wireshark

Анализатор сети

Анализатор трафика

Разбор пакетов

Изучение сети

Сетевые протоколы

Компьютерные сети

как использовать wireshark

компьютерные сети уроки

wireshark уроки

wireshark обзор

00:00:00

Hello My name is Andrey Sazykin, these are

00:00:02

practical classes in the course of networks and

00:00:05

telecommunications systems. In these

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classes, we will consider in practice the

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operation of the protocols that

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we studied in lectures. To do this, we will

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need a wireshark network analyzer, it

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accepts all the data that comes from the

00:00:19

network and allows you to view it.

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wireshark is distributed. You

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can download it for free from the website wireshark.org

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It is available for different platforms The installation is

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quite simple, click Next Next

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Next Don’t forget to install the

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wincup driver, without which wir Shark

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will not work. After installation, we launch Wi

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Shark and the first thing we see is a list of

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network interfaces that are in on our

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computer in my laptop there are

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4 such interfaces, this is a wired interface

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eet a wireless network

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wi-fi network connection Bluetooth and

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another additional virtual

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network adapter we select the adapter that

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works with the network we are interested in we can see

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that the packets come only through the

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wireless network so we select it

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wir Shark screen is divided into three parts in the

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upper part the packets

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that come from the network are shown. We remember

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that computer networks are

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packet switching networks in which the data is

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divided into separate parts, which are

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actually called packets and all

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packets are transmitted over the network separately

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packets that come to our

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computer and leave from our computer

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can be seen in the upper part. Please

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note that despite the fact that we do

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not do anything with the network explicitly,

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quite a large number of packets come and go;

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in the lower part, the

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packet data is presented in the form in

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which they are transmitted over the network; this is a set of

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hexadecimal numbers Another name for

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computer networks is digital networks precisely

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because the data is transmitted

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digitally. The middle window allows us to understand

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what exactly these or those numbers in the

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packet mean. Let’s stop capturing packets for a while. To do

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this, click the red stop button in the

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upper left corner and look at the packet

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we have here. shown here

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are the headers of protocols of

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different levels Frame physical layer

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Er 2 link layer protocol

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IP network layer protocol udp

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transport protocol and

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application layer snmp protocol when we select a

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protocol, for example IP version 4,

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its header at the bottom

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is highlighted if we click on the

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triangular one on the left arrow, we will see a detailed

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description of all the fields in the

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IP protocol header. For example, you can see where the

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sender’s address is in the packet. Here

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it is in hexadecimal, here it is

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in decimal and the

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recipient’s IP address. Now let’s figure out how you can

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view the data that is transmitted

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inside packets; for example, open a

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document in the browser rfc which describe the

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operation of the protocol we will open the document rfc

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791 which describes the operation of the

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IP protocol the work of other protocols

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in other rfc documents for example rfc

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number

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793 describes the operation of tcp

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2131 DHCP 792 acmp

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826 of the ARP protocol Please note that

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we are not opening HTML but text versions of

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documents rfc text versions convenient

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to watch Shark since they do not have HTML

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markup, before opening the link

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in the browser, we will start capturing the packet aark

00:04:00

ver Shark will offer to save the packets

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that we previously captured,

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but we will refuse

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this rfc document describes the

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Internet protocol, there

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is a wonderful

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pseudo-graphics inside

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that describes the interactions

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protocols is similar to the

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tcpip interaction model or the

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open systems interaction model,

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now we go to Wi shark in order

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to quickly find the package we need, we

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use a filter, the browser transmits

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data using the

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http protocol, we perform a filter using http, we see

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Get this is a request, and this is the response at the bottom the

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packet is presented in hexadecimal

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form in the middle we can look at all the

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headers And in the last part the

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data that is

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inside the rfc 791 internet protocol is

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the same as what we saw in the browser

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only here there is

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formatting and let's now

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find our pseudo-graphics to

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make sure that it is the same the document itself

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Here we see the hierarchy of

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protocols Exactly the same as what we

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saw in the browser

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Now you know how to use wir shark

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to examine the packets

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that come to your computer from the

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network as homework

00:05:38

Install Wi Shark on your computer and

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try to explore the Protocols that

00:05:44

we studied in lectures this lesson is

00:05:46

over Thank you goodbye

Description:

Описание анализатора сети Wireshark и его применения для исследования компьютерных сетей. Поддержать курс можно через сервис Cloudtips - https://pay.cloudtips.ru/p/45a4055b Заранее спасибо за помощь! Добавляйтесь в друзья в социальных сетях: VK - https://vk.com/avsozykin telegram - https://t.me/a_sozykin Мой сайт - https://www.asozykin.ru/ Ссылка для скачивания Wireshark: https://www.wireshark.org/ Ссылки на документы RFC с описанием протоколов: http://www.ietf.org/rfc/rfc791.txt - IP (используется в видео) http://www.ietf.org/rfc/rfc793.txt - TCP http://www.ietf.org/rfc/rfc2131.txt - DHCP http://www.ietf.org/rfc/rfc792.txt - ICMP http://www.ietf.org/rfc/rfc826.txt - ARP

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