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
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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: 4,537 One of the things that we have to do when capturing packets is save the packet captures to a file, so we can study them, or even send them to someone else who can help us to understand what is happening, or to send them the manufacturers as evidence of what went […]
Anonymizing Capture Files and More with Tracewrangler Read More »
Post Views: 8,490 Microsoft has added a packet sniffing/packet capture tool in the latest Windows 10 update. We have previously discussed using the ‘netsh’ command to do packet capture in Windows (see my article here). The pktmon tool is new. What does this mean? Is it better than netsh? Does it integrate with Wireshark? Well,
Packet Capture in Windows using pktmon.exe Read More »
Post Views: 7,376 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 Ok all you Mac users, here is the way you capture Wi-Fi/WLAN frames using your Mac and Wireshark. First, Mac users get a really easy time of
Capturing Wi-Fi WLAN Packets in Wireshark on MacOS Read More »
Post Views: 4,471 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 There are several other articles that we have written on various Windows 10 WLAN/Wi-Fi commands that you can execute to perform various important wireless information gathering and
Windows WLAN/Wi-Fi Commands of Interest Read More »
Post Views: 3,361 Windows 10 has several interesting WLAN/Wi-Fi commands you can run from the Windows 10 and later command or Powershell. One of them is the WLAN Report. The Windows WLAN Report is a detailed, automatically generated diagnostic report that provides a comprehensive history of Wi-Fi activity on a Windows system. It is produced
Viewing the WLAN/Wi-Fi details via the WLAN Report in Windows Read More »
Post Views: 2,816 I saw an interesting question recently that I thought I would offer up an answer to: In Windows ‘netsh wlan show interfaces’, what does the signal % mean? Here is an example (I have two wireless interfaces on my system – Wi-Fi is the built in wireless adapter, and Wi-Fi4 is an
What is the % signal in Windows Wireless? Read More »
Post Views: 4,187 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: 94,550 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: 2,250 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: 3,243 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: 2,041 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: 9,602 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: 6,657 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 »
