You can also use relational operators to test whether some field is equal to, not equal to, great than or less than some value. You can also click on the arrow on any protocol So I selected DNS Domain Name System from the Field Name list. In this article, I am going to filter out all the DNS packets. You can type in what protocol you’re looking for in the Search textbox and the Field Name section would show the ones that matched. In the Field Name section almost all the networking protocols are listed.
From here you can create filter expression to search packets very specifically. To do that, click on the Expression… button as marked in the screenshot below.Ī new window should open as shown in the screenshot below. You can also filter packets captured by Wireshark graphically. To filter packets, you can directly type in the filter expression in the textbox as marked in the screenshot below. The good thing is, in Wireshark, you can filter the packets and see only the packets that you need. So the list will be so long that it will be nearly impossible to scroll through the list and search for certain type of packet. On a busy network thousands or millions of packets will be captured each second. You can also click on the arrows to expand packet data for a particular TCP/IP Protocol Layer. You can also see the RAW data of that particular packet. As you can see, information about different layers of TCP/IP Protocol is listed. Selecting a packet would show many information about that packet. Now you can click on a packet to select it. I pinged from the terminal and as you can see, many packets were captured. I am capturing packets on the ens33 wired network interface as you can see in the screenshot below. Just press and hold and click on the interfaces that you want to capture packets to and from and then click on the Start capturing packets icon as marked in the screenshot below.
You can also capture packets to and from multiple interfaces at the same time. You can also double click on the interface that you want to capture packets to and from to start capturing packets on that particular interface.
Now to start capturing packets, just select the interface (in my case interface ens33) and click on the Start capturing packets icon as marked in the screenshot below. Here, I listed only the Wired network interfaces. You can choose to show specific types of interfaces in the welcome screen from the marked section of the screenshot below. There are many types of interfaces you can monitor using Wireshark, for example, Wired, Wireless, USB and many external devices. When you start Wireshark, you will see a list of interfaces that you can capture packets to and from.
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