![]() ![]() It is possible to decode protocols with Wireshark, which is sometimes known as "sniffing" packets, although this term is not an accurate description of what Wireshark does. Its powerful features make it a favorite tool for security-related tasks, such as data forensics and penetration testing. It is often used by network administrators to troubleshoot network problems, and by network developers as a protocol analyzer for testing new protocols. Wireshark can be used to examine all manner of network traffic, from the simplest to the most complex. In this article, you'll learn how to get IP using Wireshark and how to protect it. In addition to its power and the ability to read and save all kinds of packets, Wireshark also has powerful traffic analysis functions, available in a variety of ways. It is the world's most popular network protocol analyzer, with more than 1,000,000 users worldwide. The display filter syntax to filter out addresses between 192.168.1.1 – 192.168.1.255 would be ip.addr=192.168.1.0/24 and if you are comfortable with IP subnetting, you can alter the /24 to change the range.Wireshark program, also known as Ethereal, is a packet analyzer and Wireshark sniffer tool. However, if the addresses are contiguous or in the same subnet, you might be able to get away with a subnet filter. One time-consuming approach would be to literally type out all the addresses you want to filter on. In this video, I respond to a question from one of my readers who wanted to create a display filter for many IP addresses. In either case, you will need to use a display filter to narrow the traffic down. Even when you have a capture filter, it may be too generic. You may not know what to focus on when you capture packets, resulting in no capture filter. A display filter is configured after you have captured your packets. ![]() ![]() A capture filter is configured prior to starting your capture and affects what packets are captured. Note that in Wireshark, display and capture filter syntax are completely different. In this video, I review the two most common filters in Wireshark. One of the keys to being an effective network troubleshooter when using a protocol analyzer is the ability to see patterns, which is where filters come into play. ![]()
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