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: 5,151 Using Wireshark in Microsoft Windows reveals some quirks that naturally leave you scratching your head as to what is going on. For example, when I launch Wireshark on my Windows 10 system I see a bunch of different interfaces. Some make sense (Wi-Fi, Ethernet 2) but others….: What are all the Local
What are all the Microsoft local area connections? Read More »
Post Views: 95,985 A common question regarding Wireshark packet analysis is “Can I find a text string in a packet capture?” 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 The answer is that it depends on where the
Finding Text Strings in Wireshark Captures Read More »
Example IPv6 Fragmentation Attack
Example IPv6 Fragmentation Attack Read More »
Example IPv6 SYN Flood Attack
Example IPv6 SYN Flood Attack Read More »
Post Views: 2,786 I was asked in a recent WLAN class whether you can adjust the power level in a Wi-Fi radio. The answer is yes (if you have the right operating system), and here is how. For this demonstration, I am using Kali Linux but this should work on any Linux. Comment below if
Tweaking the Wireless Interface – Power Settings, Country etc. in Linux Read More »
Post Views: 4,145 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 Just introduced this week is a terminal version of tshark that looks like the Wireshark GUI call termshark. Why? Let’s say you run either Virtual Machines or
A Terminal Version of tshark – we love it! Read More »
Post Views: 2,403 We started to notice QUIC back in 2017. For an overview of QUIC you can see my article here: https://www.cellstream.com/2018/03/07/is-there-a-lot-of-quic-in-your-packet-captures/ How do you know if a given web site uses QUIC/gQUIC? It is a great question, and can be easily answered if you are using Google Chrome (which, by now you should
How To Observe if the Web Site you are Browsing Uses QUIC Read More »
Post Views: 11,399 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 If you are like me, you count on the Internet to help with how to’s especially when using Linux. That said, sometimes the information can be contradicting
3 Ways to put your Wi-Fi Interface in Monitor Mode in Linux Read More »
Post Views: 9,108 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 In our article on putting your WLAN Wi-Fi interface into Monitor Mode so you can sniff Wi-Fi packets and troubleshoot WLAN’s, we said that if you are
Getting a Virtual Machine to Access Wi-Fi Monitor Mode Read More »
Post Views: 10,365 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 A major change in the behavior of IP networks between IPv4 and IPv6 is that in IPv6 networks, all hosts are required to support something called Path
IPv4/IPv6 Path MTU (PMTU) Discovery Demystified Read More »
Post Views: 1,854 I received a question on how to create a delay to a subnet using GNS3. Emulating delay on a subnet allows engineers to replicate real-world latency conditions in a controlled lab environment. Production networks—especially broadband, MPLS, SD-WAN, Internet, satellite, or cellular transport paths—rarely behave like low-latency LANs. By introducing deterministic round-trip delay,
Creating Delay to a Subnet Tech Tip Read More »
Post Views: 3,177 I recently watched a YouTube video where one of the GNS3 creators was talking about GNS3 and how it runs. This convinced me to consider moving my GNS3 development work to the Linux world. I had done this years ago for the hands on training classes but my own development environment has
GNS3 in Linux – Tech Tip – Docker Error Read More »
Post Views: 6,976 One way to examine your network configuration in Linux is to use the “ip” command. I have attached a cheat sheet from Red Hat. By itself, it will show its options: So much going on here, and I find the help and man pages to be light on clarity and examples.
The Linux ‘ip’ Command in Networking Read More »
Post Views: 8,309 Equal-Cost Multi-Path (ECMP) is a forwarding mechanism for routing packets along multiple paths of equal cost with the goal to achieve almost equally distributed link load sharing. This, of course, significantly impacts a router’s next-hop (path) decision. For further details, look at RFC 2991, “Multipath Issues in Unicast and Multicast Next-Hop Selection,”
Detecting ECMP in Linux using Paris and Dublin Traceroute Read More »
Post Views: 1,947 My recent blog post regarding Linux being the operating system of choice if you are supporting/testing/operating a network has spawned some great discussion. Emerging the discussion has come a request to write up a starting point list of commands for Linux beginners. I said “Sure, I can do that!” I thought it
Linux Starting Point – Commands You Need To Know Read More »
