Welcome to our vibrant hub for all things networking and computing! At CellStream, we believe in empowering you with the knowledge to master your digital world. Whether you’re a beginner looking for foundational advice or a tech-savvy enthusiast seeking advanced techniques, our Computing Tips section is your go-to destination.
If there is something you need help on or something you would like to see added here, just drop us a line at our Discord server and we will be glad to try and help.
Be careful, not all tips work on all networking equipment nor operating systems.
Net neutrality is typically framed as a policy debate (see my background Net Neutrality post here), but its real implications are observable in packet-level behavior. For network engineers and broadband technicians, the question is not abstract: can you see evidence of blocking, throttling, or prioritization in a packet capture? Using Wireshark, it is possible to […]
Net Neutrality at the Packet Level Read More »
The following is a step by step lab exercise to examine ABR – Adaptive Bit Rate used in modern video content delivery. I won’t explain ABR here – you can read about ABR and what it is, and how it works here in a recent post. We will analyze a synthetic but realistic packet capture
A Synthetic ABR Lab Exercise Read More »
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 In our previous post I showed you how to use Wireshark’s Ring Buffer feature. I think we can all agree how great that feature is. In this port I wanted
Combining Wireshark Ring Buffers with Capture Filters for Performance Read More »
Check out these great references: Our custom profiles repository for Wireshark Our Udemy course on Wireshark Our Udemy course on Wireless Packet capture Wireshark’s Ring Buffer feature is a capture mechanism feature that automatically rotates packet capture files based on size or time limits, overwriting the oldest files when a defined limit is reached. It
Wireshark Ring Buffer Capture Feature Read More »
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 OK folks, based on some feedback from Reddit, I decided to update this post from 2013. Modern Linux distributions have largely deprecated the legacy net-tools suite (which included ifconfig, route,
IPv6 Linux Command Line Examples Read More »
A broadband technician working with fiber optics must understand both the theory and the hands-on operational realities of fiber networks. The following areas represent the core knowledge required to install, maintain, and troubleshoot fiber effectively in access and distribution networks. 1. Fiber Fundamentals Technicians must understand how fiber carries data as light, not electricity. Fiber-optic
Fiber Optics Primer for Technicians Read More »
Below is a clean, technician-focused list of the Windows PowerShell commands used for Wi-Fi and WLAN troubleshooting, organized by function. This aligns well with broadband-tech workflows, capture analysis, and WLAN Operations fundamentals. 1. Let’s Start with Discovering Wi-Fi Interfaces & Drivers Get Wi-Fi NICs & Driver Info Driver Version / Capabilities 2. Performing Scans for
Windows PowerShell Commands for Wi-Fi and WLANs Read More »
Here’s a solid toolbox of Windows PowerShell commands used for network troubleshooting, with quick notes on what each one is good for. I’ll try to group them by task so they are a little easier to remember. 1. Basic Connectivity & “Ping-Style” Tests Test-Connection PowerShell’s ping (ICMP echo) equivalent. Test-NetConnection More advanced tester: port check
PowerShell Commands Used for Network Troubleshooting Read More »
I provide this information for reference when examining TLS in Wireshark. The TLS 1.2 protocol ladder (also called the TLS handshake ladder) describes the step-by-step sequence of message exchanges between a client and server as they negotiate a secure, encrypted connection. Think of it as a “ladder” where each side alternates rungs (messages) upward until
The TLS 1.2 Protocol Ladder Read More »
Using a loopback adapter (also called a local loopback interface) for packet capture in Wireshark allows you to capture traffic that stays within your own computer — for example, packets exchanged between local applications via localhost or 127.0.0.1. Normally, this traffic never reaches a physical network interface, so a loopback capture is needed to see
What is the Adapter for loopback traffic capture in Wireshark? Read More »
Many technicians and network engineering staff, as well as IT staff, often need to “tap” into the Ethernet to capture and troubleshoot network traffic. A full-duplex tap (also called a network tap) is a hardware device placed inline on an Ethernet link that allows network engineers to capture all traffic traveling in both directions —
Ethernet Taps to Capture Network Traffic Read More »
I am a ChatGPT subscriber to the basic (not PRO) service. I saw the following post on LinkedIn and was fascinated: Think about the implications. You don’t need to know how to use Wireshark other than to do a capture. You certainly don’t need to know how to troubleshoot packet captures as ChatGPT can do
Can ChatGPT 5 analyze PCAP’s? Read More »
Before anything, I want to thank my user @LeoRegem on Discord for providing the information below. Thank you! Join us there is you want to comment. Here are the steps for capturing WLAN Wi-Fi packets on Android (basically getting into monitor mode and selecting channels, etc): Once you have this set, you can capture on
Capturing WLAN Wi-Fi Packets on Android Read More »
Knowing how to use nmap is critically important for cybersecurity professionals because it is one of the most powerful and versatile tools for network reconnaissance, security auditing, and vulnerability assessment. Nmap is to cybersecurity what a stethoscope is to a doctor—a diagnostic tool that’s fundamental to identifying issues, assessing risk, and maintaining a secure environment.
Using nmap for Cybersecurity Read More »
In our post introducing the nmap Scripting Engine (NSE) we discuss what the nmap scripting engine is and how to use it. In this post I wanted to provide a full list of all the nmap scripts. There are (as of this writing) 612 NSE scripts and 139 NSE Libraries. The source for this information
A Complete List of nmap Scripts Read More »
