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: 6,060 For those of you who love Wireshark and are needing to analyze ARP packets, we have the profile for you. Profiles are one of the most important Wireshark capabilities. Setting up and using different profiles for different environments, protocols, and tasks is a crucial skill that we teach in our Wireshark courses. […]
A Wireshark ARP Configuration Profile Read More »
Post Views: 1,946 In this article I wanted to explain some of the basics of a tool called ‘netcat’. Similar to my article of nmap, we will start simple and add some details as we go. What is Netcat? From the netcat web site: Netcat is a featured networking utility which reads and writes data across
The Basics of ‘netcat’ Read More »
Post Views: 1,684 If you routinely have to change or modify your Windows configuration, especially for things like printers and networks, you find yourself navigating the Control Panel maze of choices to get to the place where this can be done. This can become tedious and time consuming. What if you had a place where
GodMode in Windows Read More »
Post Views: 12,124 In my prior article on getting started with nmap, I showed you how to get started with this superb network scanner. In that article we did basic scans to locate what hosts were on a given network and display what services were running on those hosts. In this article I am going
Deeper Scanning with nmap Read More »
Post Views: 11,807 In the prior articles (Getting Started with nmap and Deeper Scanning with nmap), we showed you how to get started, and how to dive deeper with this superb network scanner. Let’s go even deeper! One of the cool things nmap has is the ability to create scripts. Now doing this from
Even Deeper Scanning with nmap Read More »
Post Views: 13,334 Nmap (“Network Mapper”) is a free and open source (license) utility for network discovery and security auditing that has been around since 1997. Surveillance and network scanning is often one of the first steps in Penetration Testing or Security Validation. Many systems and network administrators also find it useful for tasks such
Getting Started with nmap Read More »
Post Views: 12,270 Welcome to my little nmap cheat sheet! To learn more about nmap – check out my articles: Getting Started with nmap and Deeper Scanning with nmap and Even Deeper Scanning with nmap and Advanced nmap Scripting Engine. There was no intent here to recreate the full nmap capabilities, that would have been a waste
A Little nmap Cheat Sheet Read More »
Post Views: 2,674 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 more and more of you are moving to Voice over IP, you will want to use Wireshark to do voice analysis. But first, you may want
Using tshark for Packet Voice Read More »
Post Views: 11,060 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 many of you know, tshark is the command-line version of Wireshark, designed for packet capture and deep protocol analysis without a graphical interface. It uses the
tshark Usage Examples Read More »
Post Views: 4,220 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 Using Wireshark Coloring Rules – Some Notes A great site with additional coloring rules offered to the community: http://wiki.wireshark.org/ColoringRules All default coloring rules are stored in a
Using Coloring Rules in Wireshark Read More »
Post Views: 2,721 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 If the Wireshark host performs TCP and UDP checksum offloading – the process of calculating the checksum on the NIC and not by the protocol stack –
Removing Checksum Calculations in Wireshark Read More »
Post Views: 1,481 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 We all know what a great tool Wireshark is. One of the features added to Wireshark is the ability to temporarily colorize an Ethernet, IP,
Using Wireshark Temporary Colors to easily see a Conversation Read More »
Post Views: 2,112 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 Here is another Wireshark (TM) usage tip! Normally, and by default, Wireshark captures packets and displays IP addresses of the devices that are sources and destinations: During
Basic Wireshark Layer 3 Name Resolution Read More »
Post Views: 1,856 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 Calling all Wireshark Users! Feel free to download our Wireshark Display Filter Cheat Sheet right here! This cheat sheet organizes the display filters by Layer of the
Wireshark Display Filter Cheat Sheet Read More »
Post Views: 1,590 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 One of the cool things you can do with Wireshark is capture packets on remote servers or systems. This is particularly handy for those who
Using Wireshark to Capture on Remote Servers or Systems Read More »
