Welcome to CellStream’s Networking and Computing Tips resource center, where technology professionals, students, and enthusiasts can find practical guidance, troubleshooting techniques, and real-world solutions for today’s networking and computing challenges. Our goal is to help you work smarter, solve problems faster, and build a stronger foundation of technical knowledge.
Whether you’re configuring a network, optimizing system performance, learning a new technology, or troubleshooting a difficult issue, you’ll find valuable insights drawn from decades of industry experience. From Wireshark packet analysis and broadband technologies to Windows, Linux, cybersecurity, Wi-Fi, and Internet protocols, our tips are designed to be practical, actionable, and immediately useful.
• Step-by-step technical guides and how-to articles
• Networking troubleshooting techniques and best practices
• Wireshark tips, packet analysis workflows, and protocol insights
• Windows, Linux, and computing optimization recommendations
• Cybersecurity awareness and protection strategies
• Broadband, Wi-Fi, Ethernet, TCP/IP, and Internet technology guidance
• Productivity tips and tools for network engineers and IT professionals
• Improving network troubleshooting efficiency
• Optimizing computer and operating system performance
• Securing devices, accounts, and data
• Capturing and analyzing packets with Wireshark
• Understanding TCP/IP, DNS, DHCP, Ethernet, and Wi-Fi technologies
• Using industry tools more effectively
We’re always looking for new ideas, questions, and topics to explore. If there’s a networking or computing subject you’d like us to cover, or if you need help solving a technical challenge, connect with us through our Discord community or contact us directly.
Please note that not all tips, procedures, and configuration examples apply to every operating system, network device, software version, or vendor platform. Always verify compatibility and test changes in a controlled environment before implementing them in production networks.
Post Views: 2,917 An essential function when administering a Linux system is viewing, configuring and managing users and groups. I cover adding users in this article: https://www.cellstream.com/2022/04/06/using-the-useradd-command-to-create-user-accounts-in-linux/ That said, viewing users is done using a few simple commands. How To View Users on a Linux System Every user on a Linux system, whether created as […]
Viewing Users/System Users on Linux Read More »
Post Views: 5,047 Like most operating systems, Linux can have multiple user accounts. The system administrator or root account, or users with sudo privileges are responsible for managing these users, as well as managing those accounts. Linux is a multi-user system, which means that more than one person can interact with the same system at
Using the useradd Command to Create User Accounts in Linux Read More »
Post Views: 2,078 Hi everyone! Happy Thanksgiving 2021. Just released – Wireshark 3.6.0!!! Why is this important to me, you, and everyone who troubleshoots Voice traffic using Wireshark? Well, there are many changes to the voice related functionality in Wireshark in this (actually as part of the development 3.5.0 – you can read more on
Important Updates to Wireshark for Voice and VoIP Read More »
Post Views: 60,931 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 Hi Everyone! If you are like me, you use Wireshark every day. For me that means troubleshooting many different network applications and traffic types, including Voice traffic
Wireshark 3.5 Development Release adds significant voice upgrades Read More »
Post Views: 3,043 Here is a quick and clever technique in Wireshark. Let’s say you want to present, testify, or teach about a packet capture in Wireshark, but you want to redact information that is not important, perhaps hiding an error that was made, or some information that is private, or some other reason. Redaction
Redaction Technique in Wireshark Read More »
Post Views: 5,329 Say it isn’t true! For the first time in the world (for me) I can put a Wi-Fi interface on a Windows 10 machine into Monitor mode!!!!! Monitor Mode in Windows At Last! I know, this is boring to a few of you because you have been capable of this. You are
Monitor Mode in Windows At Last Read More »
Post Views: 2,599 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
What does the BGP Next-Hop-Self Command Actually do? Read More »
Post Views: 2,189 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
Cool Bandwidth Monitoring in Linux Read More »
Post Views: 3,762 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,
Modifying the Wireshark Window Title Read More »
Post Views: 3,348 If you are a Linux user, you know how important the Terminal is to your compute world. Here are Seven Awesome Linux Terminal Utilities for Everyone. 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
Seven Awesome Linux Terminal Utilities for Everyone Read More »
Post Views: 3,583 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 IPv4 Subnetting Illustrated method is extremely helpful in certification
IPv4 Subnetting Illustrated Read More »
Post Views: 6,132 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
Adding Packet Comments in Wireshark Read More »
Post Views: 2,897 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
Packet Diagram feature in Wireshark Read More »
Post Views: 3,546 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
Nested Display Filter Buttons feature in Wireshark Read More »
Post Views: 11,877 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
Getting started with iPerf – an illustrated step by step procedure Read More »
