Welcome to some great networking and computing tips.
Usually these have to do with how to do this or how to change that. The subjects are fairly broad when it comes to networking and we encourage both your feedback and contributions by adding comments and extending any of the tips. If there is something you need help on or something you would like to see added here, just drop us a line from the “Contact Us” link and we will be glad to try and help.
Be careful, not all tips work on all networking equipment nor operating systems. Also be sure to add your comments as well as read comments and questions from other readers.
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I got this question the other day: “What does the BGP Next-Hop-Self command actually do?” It is a great question that I tried to answer in a brief description without success, and actually repeated my answer several times. It was clear to me that my answer was not being understood in terms of a process …
What does the BGP Next-Hop-Self Command Actually do? Read More »
This article will discuss how to use some cool bandwidth monitoring tools in Linux so that you have a screen that looks like this: The first thing we will need is a multi-tab flexible terminal emulator. My choice is Tilix, but there are others like Terminator. sudo apt install tilix -y Now that you have …
Did you know that you can customize the Wireshark window title? The first time I ran across this was when using GNS3. Whenever I did a packet capture in my GNS3 environment the Wireshark window title would be changed to show which link I had done the capture on: A little digging, and I found …
If you are a Linux user, you know how important the Terminal is to your compute world. Now there are a bunch of different Terminals in Linux, this article is not about that, but I like Tilix the best: sudo apt install tilix Instead, this article is about apps that run in the terminal. Let’s …
Seven Awesome Linux Terminal Utilities for Everyone Read More »
Yes yes, you can always use an IPv4 calculator to determine the IPv4 subnet addresses, and most of these are free. If you want to dig deeper into how IPv4 subnetting works, check out how I have always done this by hand. My method is extremely helpful in certification classes, interview questions/tests and for anyone …
Just a quick tip on how to add packet comments to your packet captures. The use cases are fairly straight forward: perhaps you want to add comments as you troubleshoot a packet capture, or perhaps you want to record what you found for later demonstration, or perhaps you just want to remember two years later …
In Wireshark 3.3.0 development release, and 3.4.0 stable release and later, you are going to find a hidden gem. Wireshark call this the Packet Diagram, and I absolutely love it. Let’s say you are a pen-tester or a test engineer who is looking at a packet capture and you want to document what is happening …
In Wireshark 3.4.0 stable release and later, you are going to find a display button feature that we have already leveraged to change all our profiles. We now have the ability to nest display filter buttons, and I absolutely love this feature. One of the cool things about being able to customize Wireshark is to …
Nested Display Filter Buttons feature in Wireshark Read More »
In this article we will get you started with the iPerf tool. We will be using it in a Linux environment, but know that it is available for all systems at http://iperf.fr. iPerf is used to test performance, throughput, packet loss, and jitter on TCP/IP networks. iPerf defaults to testing TCP – port number 5002. iPerf …
Getting started with iPerf – an illustrated step by step procedure Read More »
Just like out article on Network Management Tools (you can read/view that list here), I wanted to compile a list of Networking Utilities and Tools in this article. Frankly, this is a bit of challenge as what tools are available depends on operating system, version and such. Much also depends on what point of view …
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 Whenever your web browser connects to a web server using HTTPS, a secure connection is established, keys are exchanged, and the traffic is encrypted. We won’t spend any time in …
One of the things that we have to do when capturing packets is save the packet captures to a file, so we can study them, or even send them to someone else who can help us to understand what is happening, or to send them the manufacturers as evidence of what went wrong with an …
Anonymizing Capture Files and More with Tracewrangler 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 …
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 MAC OSx 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 There are several other articles that we have written on various Windows 10 WLAN/Wi-Fi commands that you can execute to perform various important wireless information gathering and management. We will …
