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.
For those of you who love Wireshark and are supporting BGP, we would like to offer a great default profile for basic BGP. Consider for a moment what would be important in your network administration in basic BGP: Being able to filter BGP packets quickly, as well as finding potentially bogus BGP Colorizing BGP message […]
A Wireshark Basic BGP Configuration Profile Read More »
Most network engineers and technicians are quickly discovering that with “everything over IP” we are required to understand exactly what this means. For a lot of the standard, traditional data communications between clients and servers this means transport over TCP. Furthermore, it requires the ability to troubleshoot TCP. To troubleshoot TCP you have
A Wireshark TCP Troubleshooting Configuration Profile Read More »
For those of you who love Wireshark and are supporting IPv4, we would like to offer a great default profile for IPv4. Profiles are one of the most important Wireshark capabilities. Setting up and using different profiles for different environments, protocols, and tasks is a crucial skill that we teach in our Wireshark courses. Let’s
A Wireshark IPv4 Configuration Profile Read More »
For those of you who love Wireshark and are needing to analyze DNS Queries and Responses, we have the profile for you. Profiles are one of the most important Wireshark capabilities. Setting up and using different profiles for different environments, protocols, and tasks is a crucial skill that we teach in our Wireshark courses. Let’s
A Wireshark DNS Configuration Profile Read More »
For those of you who love Wireshark and are needing to analyze ARP packets, we have the profile for you. Profiles are one of the most important Wireshark capabilities. Setting up and using different profiles for different environments, protocols, and tasks is a crucial skill that we teach in our Wireshark courses. Let’s say you
A Wireshark ARP Configuration Profile Read More »
In this article I wanted to explain some of the basics of a tool called ‘netcat’. Similar to my article of nmap, we will start simple and add some details as we go. What is Netcat? From the netcat web site: Netcat is a featured networking utility which reads and writes data across network connections, using
The Basics of ‘netcat’ Read More »
If you routinely have to change or modify your Windows configuration, especially for things like printers and networks, you find yourself navigating the Control Panel maze of choices to get to the place where this can be done. This can become tedious and time consuming. What if you had a place where all these types
GodMode in Windows Read More »
In my prior article on getting started with nmap, I showed you how to get started with this superb network scanner. In that article we did basic scans to locate what hosts were on a given network and display what services were running on those hosts. In this article I am going to dig a
Deeper Scanning with nmap Read More »
In the prior articles (Getting Started with nmap and Deeper Scanning with nmap), we showed you how to get started, and how to dive deeper with this superb network scanner. Let’s go even deeper! One of the cool things nmap has is the ability to create scripts. Now doing this from scratch would be
Even Deeper Scanning with nmap Read More »
Nmap (“Network Mapper”) is a free and open source (license) utility for network discovery and security auditing that has been around since 1997. Surveillance and network scanning is often one of the first steps in Penetration Testing or Security Validation. Many systems and network administrators also find it useful for tasks such as network inventory,
Getting Started with nmap Read More »
Welcome to my little nmap cheat sheet! To learn more about nmap – check out my articles: Getting Started with nmap and Deeper Scanning with nmap and Even Deeper Scanning with nmap and Advanced nmap Scripting Engine. There was no intent here to recreate the full nmap capabilities, that would have been a waste of your and
A Little nmap Cheat Sheet 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 more and more of you are moving to Voice over IP, you will want to use Wireshark to do voice analysis. But first, you may want to run a
Using tshark for Packet Voice 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 many of you know, T-Shark is the command line version of Wireshark. For T-Shark beginners, look first here.For more advanced T-Shark users, read on.I often get asked for T-Shark
tshark Usage Examples 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 Using Wireshark Coloring Rules – Some Notes A great site with additional coloring rules offered to the community: http://wiki.wireshark.org/ColoringRules All default coloring rules are stored in a file Computer> Local
Using Coloring Rules in Wireshark 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 If the Wireshark host performs TCP and UDP checksum offloading – the process of calculating the checksum on the NIC and not by the protocol stack – Wireshark will trip
Removing Checksum Calculations in Wireshark Read More »