And very precise information can be extracted from the live packet flow. The benefit of having capture filters set is that the size of the output of the capture can be limited. When you are in a corporate network, there are a lot of packets that your NIC card receives. These filters are of 2 typesĪs the name indicates, capture filters are used to filter the packets when they are captured. Wireshark provides you with a very wide scope of configuration according to your needs. You can stop the capture using the Capture->Stop or pressing Ctrl+e on the keyboard. Once you click on start, then Wireshark starts to capture the packets on that interface. You can select it based on the IP address you can see, or the name of the interface. Once you get the screen, you can decide which interface to choose. To do that you can either click on the Capture menu or click on the interface, or you can click on the NIC icon in the left hand top corner. When you open Wireshark, the first thing you need to do is to choose the interface on which you need to capture the packet s.For unix like environments, another library by the name libcap is available. When you install Wireshark you will receive a prompt to install the WinPcap component, which is nothing but the windows version of pcap. So it can only capture the packets on the networks supported by pcap. Basically, pcap is a library of information about various protocols, their packet structure, and different messages passed in those protocols. It allows the user to see all traffic being passed over the network. Wireshark puts your network card into promiscuous mode, which basically tells it to accept every packet it receives. It is used for network troubleshooting, analysis, software and communications protocol development, and education. Wireshark is a free packet sniffer computer application. This article is focused on a few things about the Wireshark tool which is used for packet capture in the networks.
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