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: 2,608 Check out these additional Routing Resources: Our IP Routing course at Udemy Our Routing Collection on Patreon Our Custom Profiles for Wireshark Classes at the Online School This is commonly asked question from our routing courses and routing discussions in other courses. Let’s explain this command in this article. To start, you
What is the ‘area range’ command in OSPF? Read More »
Post Views: 2,456 Check out these additional Routing Resources: Our IP Routing course at Udemy Our Routing collection at Patreon Our Custom Profiles for Wireshark Classes at the Online School In a recent course on IPv6, one of my students asked what the “network” command did as we were beginning to study the routing commands
What is the “network” Command in OSPF and BGP? Read More »
Post Views: 3,513 If you attend our WLAN Operations course, one of the things we discuss is Active Scanning. Your system uses your saved Wi-Fi networks to actively scan for those networks (probing). There are potential security risks in this, especially with free networks. Most students conclude they should not remember networks in this way.
Deleting Remembered Wi-Fi Networks in Windows, MacOS, and Linux (Debian) Read More »
Post Views: 1,637 Sometimes troubleshooting in Wireshark is easy-ish, you find a misbehaving protocol behavior or pattern or even a bad packet, sometimes it is tricky and takes a while to find something, and sometimes it is as clear as mud. Check out these great references as well: Our custom profiles repository for Wireshark Our
Real-life Wireless Wireshark Troubleshooting Example Read More »
Post Views: 1,701 The following is a must have reference for Linux systems networking operations. We will be using the two basic commands: ‘ifconfig’, ‘iwconfig’, and ‘ip’. If you are the rtoot or administrator you should have no issues using the commands as shown. If you do not, you may want to use ‘sudo’ in
Linux Networking Commands Read More »
Post Views: 2,814 How can you verify your Wi-Fi is on the right channel, who else is interfering? We wish that was easy. And at a normal user level it is. First you need a Wi-Fi scanner. The following is a growing list of Wi-Fi Scanning Utilities for various platforms. Most all are free,
Wi-Fi Scanning Tools List Read More »
Post Views: 23,699 You have to think of and understand the Internet’s Domain Name Service -DNS- as a System. The DNS is the system which, in its primary function, converts Internet domain names that you type into URL bars, or hyperlinks that you click on a web page into numeric IPv4 and/or IPv6 addresses. In
The DNS System In Depth Read More »
Post Views: 2,458 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 I am often asked how SSL and TLS can be decrypted in Wireshark captures. I have written a separate article on HTTPS Decryption in Wireshark here. NOTE:
Leveraging SSL and TLS Decryption in Wireshark Read More »
Post Views: 8,424 Hi everyone! Being able to decrypt the encrypted contents of packet captures is very important if you want to troubleshoot anything above Layer 4. This is even more important today as the network is evolving to QUIC where everything is encrypted. Check out these great references as well: Our custom profiles repository
TLS Decryption in Wireshark Using Key Log Files in Windows, MAC, and Linux Read More »
Post Views: 33,690 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 you are a Wireshark power user, you know the importance of complex display filters to narrow searches for very particular items. The challenge can be to
Zero to Hero with Wireshark Display Filter Macros Read More »
Post Views: 1,957 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 For those of you who love Wireshark and are asking the question: How do I find what HTTPS site were visited within a capture? I have a
Finding HTTPS Sessions in Wireshark Captures Read More »
Post Views: 3,137 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
How do I find all packets from Apple devices in Wireshark? Read More »
Post Views: 1,758 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 It’s Sunday, it’s Father’s Day, and it is the day before Sharkfest 2017! One of the best presents has been that TRANSUM has been included as a
The TRANSUM tool is now in Wireshark 2.4! Read More »
Post Views: 1,502 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 clever Wireshark 2.x features has to do with Wireless packet trace analysis. From the Wireless menu drop down, there is a WLAN Traffic item.
Wireless Report in Wireshark 2.x Read More »
Post Views: 8,273 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
Capturing Wi-Fi WLAN Packets in Wireshark on Linux Read More »
