Using a loopback adapter (also called a local loopback interface) for packet capture in Wireshark allows you to capture traffic that stays within your own computer — for example, packets exchanged between local applications via localhost or 127.0.0.1. Normally, this traffic never reaches a physical network interface, so a loopback capture is needed to see […]
What is the Adapter for loopback traffic capture in Wireshark? Read More »
Many technicians and network engineering staff, as well as IT staff, often need to “tap” into the Ethernet to capture and troubleshoot network traffic. A full-duplex tap (also called a network tap) is a hardware device placed inline on an Ethernet link that allows network engineers to capture all traffic traveling in both directions —
Ethernet Taps to Capture Network Traffic Read More »
I am a ChatGPT subscriber to the basic (not PRO) service. I saw the following post on LinkedIn and was fascinated: Think about the implications. You don’t need to know how to use Wireshark other than to do a capture. You certainly don’t need to know how to troubleshoot packet captures as ChatGPT can do
Can ChatGPT 5 analyze PCAP’s? Read More »
As a frequent reader here will know, my Wi-Fi Analyzer of choice is called WinFi. It has been around many years as is fabulous. In version 2, and the new version 3, you can capture Wi-Fi Beacon Frames and examine them. This post will explain what you can capture and how this is useful. What
Capturing Wi-Fi Beacon Frames with WinFi Read More »
Scenario Let’s say you have a DHCP server running on a Cisco Switch that is behaving strangely and you want to examine the traffic over a couple of hours while not creating a gigantic unmanageable capture file. A note here: I am doing this on a Cisco switch, but most all vendor switches support this
Troubleshooting Your Network Using Port Mirroring and Packet Capture Read More »
I am often asked this question of where to access PCAP or PCAP-NG files so that folks can explore packet captures using Wireshark. I have always provided these resources in my Wireshark classes at the Online School, but thought I should also just list them here for public consumption. Look up the hashtag “captureeveryday” in
Where can I get PCAP Packet Captures for Learning and Exploration? Read More »
Microsoft has added a packet sniffing/packet capture tool in the latest Windows 10 update. We have previously discussed using the ‘netsh’ command to do packet capture in Windows (see my article here). The pktmon tool is new. What does this mean? Is it better than netsh? Does it integrate with Wireshark? Well, it means you
Packet Capture in Windows using pktmon.exe Read More »
Check out these great references as well: Our Wireless custom profile for Wireshark Our Udemy course on Wireless Packet capture Our other Wi-Fi related articles Ok all you Mac users, here is the way you capture Wi-Fi/WLAN frames using your Mac and Wireshark. First, Mac users get a really easy time of putting their interface
Capturing Wi-Fi WLAN Packets in Wireshark on MacOS Read More »
A common question regarding Wireshark packet analysis is “Can I find a text string in a packet capture?” Check out these great references as well: Our custom profiles repository for Wireshark Our Udemy course on Wireshark Our Udemy course on Wireless Packet capture The answer is that it depends on where the text string is
Finding Text Strings in Wireshark Captures Read More »
Check out these great references as well: Our custom profiles repository for Wireshark Our Udemy course on Wireshark Our Udemy course on Wireless Packet capture Just introduced this week is a terminal version of tshark that looks like the Wireshark GUI call termshark. Why? Let’s say you run either Virtual Machines or Servers without a
A Terminal Version of tshark – we love it! Read More »
Have you noticed a lot of QUIC protocol in your packet captures? I certainly have, and we had better talk about what this is. What is QUIC (now more recently called gQUIC)? QUIC is a new protocol created by the fine folks at Google. It stands for Google Quick UDP Internet Connections. It is an
Is there a lot of QUIC in your Packet Captures? Read More »
Check out these great references as well: Our custom profiles repository for Wireshark Our Udemy course on Wireshark Our Udemy course on Wireless Packet capture As those who have studied our Wireless Profile (available from the Profile Repository) know, there are a number of great display filters used to hunt down issues on Wireless LAN’s.
tshark Use in Wireless Networking Read More »
Check out these great references as well: Our custom profiles repository for Wireshark Our Udemy course on Wireshark Our Udemy course on Wireless Packet capture Great question, and one I get all the time. As most of you know, the manufacturer of a networking device that uses MAC addressing can be identified by the
How do I find all packets from Apple devices in Wireshark? Read More »
Check out these great references as well: Our Wireless custom profile for Wireshark Our Udemy course on Wireless Packet capture Our other Wi-Fi related articles At a recent course I taught in New England, one of the students wanted to capture Wi-Fi packets on their Windows Surface Pro. Of course, I referred them to my
Capturing Wi-Fi WLAN Packets in Wireshark on Linux Read More »
Check out these great references as well: Our Wireless custom profile for Wireshark Our Udemy course on Wireless Packet capture Our other Wi-Fi related articles As many of my clients and students know, I have always been astonished at how hard it is to capture the Wi-Fi traffic in Windows. This article will explain the
Capturing Wi-Fi WLAN Packets on Windows for Free! Read More »