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.
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 As many of my clients and students know, I have always been astonished at how hard it is to capture the Wi-Fi traffic in Windows. This article will explain the […]
Capturing Wi-Fi WLAN Packets on Windows for Free! Read More »
A frequent visitor here will know that we have many articles discussing the netsh command line shell/scripting tool in Windows. The tool was originally introduced in Win2K. If you aren’t a regular – just click on ‘netsh’ in the tag cloud to see them all. This article discusses how you can use the ‘netsh trace’
Using Netsh to Capture Packets in Windows Read More »
Monitoring, analyzing, managing, and diagraming a network can often be a huge problem for Network and System Administrators. They are often vendor specific or cost large sums of money to license. We also have the challenge of so many different network infrastructures, like Wi-Fi and wired. If you are looking for a list of tools
A List of Network Monitoring Tools for Network and System Administrators Read More »
One of the utilities that is included in your Wireshark distribution is a command line tool called ‘mergecap’. We use this tool to merge multiple captures generated, let’s say, from a ring buffer capture (you can see how to do ring buffer captures using tshark here). Alright, so let’s say you have a ring buffer
Using the mergecap Tool to Merge Packet Captures 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 As most folks who use Wireshark know, Wireshark comes with a collection of command line or terminal based utilities. Here is a view of those utilities (I got to this
Wireshark Ring Buffer Capture from the Command Line using tshark Read More »
Here is a simple tip for Windows users. Do you have applications that you need to start all the time, but it is a pain to locate them in the Start Menu? I have the answer. This has been around for years, but I am always surprised by how helpful this is to so many
A Quick Start for your Favorite Windows Apps Read More »
Let’s say you deal with HUGE packet captures and you need to parse or carve out certain types of packets or conversations from the source. This is particularly true for folks that use Ring Buffers, or folks who do huge captures over long time period with fast interfaces. If you do this you start to
Carving and Parsing Packet Captures Read More »
If you deal with enormous capture files, speeding up your work process is crucial. Watch this video for a demonstration and example of how you can solve this issue: What I have below is a minimized dissector profile you can use. This is a minimized dissector profile that will reduce Wireshark crashes, speed your carving/parsing
A Minimized Dissector Configuration Profile for Wireshark Read More »
So often we use Linux as a virtual machine or even as a test or capture system. If you are a little rusty on Linux, or brand new to it, there is a lot to learn. This article is like a mini starter course on Linux. I have built this mini course by condensing some
Getting Started with Linux – A Beginners Linux Mini-Course Read More »
If you are a Mac user, you have probably assumed that Preview (the MacOS PDF viewer) is just a viewer and can do little else. If so, you would be wrong. While there are a number of things Preview can do, one of the most important is that it can save PDF files in different
Using MacOS Preview to save PDF’s in Different Sizes Read More »
What exactly is the purpose of the IP ID field? This is actually a great question. While many have tried to answer the question in various articles on the Internet, I thought the question deserved a clear answer to the question. RFC 6864 updated RFC’s 791, 1122, and 2003 to clarify the definition of the
The Purpose of the IP ID Field Demystified Read More »
For those of you who run GNS3 and/or Virtual Box or VMware and would like to have a free legitimate Windows image, Microsoft Internet Explorer team has provided an answer! Did I mention it is free? Don’t believe me? Go here and look. You can download different versions of Windows with different versions of Internet
Free Windows Virtual Machines from Microsoft 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 A common question I get is how can I set up a custom local name resolution file for IP and MAC addresses in Wireshark. We discussed basic name resolution in
Setting up Custom Wireshark Name Resolution Files 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 When using Wireshark, on some computers, the number of interfaces present due to things like virtualization and other configurations can be overwhelming. Some times, like when we are using Wireless
Controlling Displayed Network Interfaces in Wireshark Read More »
Hi Everyone! If you support MPLS operations in your network, then you need to have an MPLS profile for Wireshark. In this case, we have an LDP profile for you to use. This is great for fundamental MPLS operations involving LDP. As with any Profile for Wireshark, to add this profile, within Wireshark, click on
Basic MPLS LDP Profile for Wireshark Read More »
