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: 1,531 Some of you know, that to master networking technologies you have to have a complete grasp of the fundamentals. Furthermore, like any technology, if you don’t review these fundamentals often, they can become a bit hazy in our memory. The question, then, is how can I come up to speed on the
Learning the Network Science Fundamentals Read More »
Post Views: 1,912 We thought it would be useful to our networking colleagues to provide an overview of the OpenFlow protocol. Let’s begin with a broad definition of what OpenFlow is. OpenFlow is a communications protocol that uses network-centric, network-aware intelligence in it’s communication design. OpenFlow works on Software Defined Network (SDN) controllers
Post Views: 24,503 For those of you who love Wireshark and are supporting Wi-Fi Wireless networks, we would like to offer a great default profile for WiFi. Let’s make no bones about this capturing and analyzing Wi-Fi traffic is not as easy (you have to be in Monitor Mode) as just selecting this profile
A Wireshark Wi-Fi WLAN Troubleshooting Configuration Profile Read More »
Post Views: 2,551 Most users of Wireshark and T-Shark are completely unaware that neither of these programs alone actually captures packets! So wireshark people (and others), let’s dig in. 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 Both
How To Use ‘dumpcap’ Natively on your Computer Read More »
Post Views: 7,152 Check out these additional IPv6 Resources: Our IPv6 overview course at Udemy Our IPv6 Custom Profiles for Wireshark Our IPv6 classes at the Online School For those of you who love Wireshark and are supporting IPv6, we would like to offer a great default profile for IPv6. Consider for a moment what
A Wireshark IPv6 Configuration Profile Read More »
Post Views: 5,333 For those of you who love Wireshark and are supporting BGP, we would like to offer a great default profile for basic BGP. Consider for a moment what would be important in your network administration in basic BGP: All this would be a great starting point. Profiles are one of the most
A Wireshark Basic BGP Configuration Profile Read More »
Post Views: 2,809 Most network engineers and technicians are quickly discovering that with “everything over IP” we are required to understand exactly what this means. For a lot of the standard, traditional data communications between clients and servers this means transport over TCP. Furthermore, it requires the ability to troubleshoot TCP. To troubleshoot
A Wireshark TCP Troubleshooting Configuration Profile Read More »
Post Views: 6,540 For those of you who love Wireshark and are supporting IPv4, we would like to offer a great default profile for IPv4. 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
A Wireshark IPv4 Configuration Profile Read More »
Post Views: 6,960 For those of you who love Wireshark and are needing to analyze DNS Queries and Responses, 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
A Wireshark DNS Configuration Profile Read More »
Post Views: 6,616 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: 2,211 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: 1,999 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: 12,486 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: 12,348 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: 13,975 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 »
