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.
The ‘cat’ [short for “concatenate“] command is one of the most frequently used commands in Linux and other operating systems. The cat command allows us to create single or multiple files, view contain of file, concatenate files and redirect output to the terminal or to files. The command is available in Linux, Windows Power Shell, and MAC-OS. […]
What is the ‘cat’ command, and how can I use it? 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 Is there a simple way to display all the IPv6 settings on a Linux machine? Absolutely! I have done the following on Debian/Ubuntu Linux. For the newbies most system settings
IPv6 Settings (SYSCTL) on Linux 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 great question and problem. The fundamental answer is you can’t. Why? Depends on who you believe. My conclusion is that Wireshark (really dumpcap) has to use either Npcap or
Using Wireshark to capture between VirtualBox VM’s Read More »
In our previous articles on nmap ( Getting Started with nmap and Deeper Scanning with nmap and Even Deeper Scanning with nmap and Advanced nmap Scripting Engine) we ran everything from the command line interface of various Linux distributions. When you install nmap, you also get something called ‘Zenmap’ which is the graphical user interface front end
Zenmap – the nmap GUI Read More »
In this article we continue our nmap series (just click on the nmap tag at the bottom of the article to see the other articles), this time we discuss an advanced nmap feature called the NSE: nmap Scripting Engine. This post get’s you started with nmap scripts. Once you get this, we have a complete
Advanced nmap – the nmap Scripting Engine (NSE) Read More »
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 Let’s talk about Wi-Fi Network Monitoring & Manipulation in Parrot Linux. If you are doing anything regarding security or penetration testing you know Linux is the only way to go.
Wi-Fi Network Monitoring & Manipulation in Parrot Linux 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 Teaching a Wireshark class with some cellular company employees, I was asked how to integrate the GeoIP IP Address resolution. I had not done this for years, so we stayed
GeoIP Add In for Wireshark 2.6 and Later Read More »
We have previously published two articles on Google’s QUIC protocol (note: Google originally called this protocol “QUIC” as you can tell by the original logo, but now that original version is referred to as gQUIC, whereas the IETF has chosen to call the newer version they are working on as “QUIC” – confusing – yes
How much QUIC Traffic is there? Read More »
Since we published the Linux Networking Commands article in October 2017, I have had several comments that I should have included the “My Trace Route” command. Ofcourse, readers were correct, but I felt that this tool deserved its own article. Some of you, depending on what version of Linux you use may not have even
My Traceroute in Linux Read More »
As a follow on to our DNS In Depth article, we wanted to provide a reference to a great tool. One of the important impacts to how fast the Internet works for users is how fast the Domain Name Service responds to database requests. For example, if you type www.cellstream.com into your URL and it takes
Testing/Baselining DNS Server Performance Read More »
Ansible is an open-source automation tool primarily used for configuration management, application deployment, and task automation. In network automation, Ansible enables IT teams to manage and configure network devices in a consistent, repeatable, and agentless manner. Ansible is a tool used to automate Server provisioning and network provisioning. Ansible is completely free! You can dive
Using Ansible for Network Automation Read More »
Have you noticed a lot of QUIC protocol in your packet captures? I certainly have, and we had better talk about what this is. What is QUIC (now more recently called gQUIC)? QUIC is a new protocol created by the fine folks at Google. It stands for Google Quick UDP Internet Connections. It is an
Is there a lot of QUIC in your Packet Captures? Read More »
As explained in our prior article on QUIC, you may be seeing a lot of QUIC traffic in your packet captures. Assuming you have read that article, and understand that all QUIC traffic is encrypted, you know the only way was to see some of the details is using Chrome itself. Today it means using
Using Wireshark to Analyze QUIC Traffic 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 those who have studied our Wireless Profile (available from the Profile Repository) know, there are a number of great display filters used to hunt down issues on Wireless LAN’s.
tshark Use in Wireless Networking 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 Perhaps…. Of course you can edit these with appropriate addresses and numbers. The ones used are just examples. Unlike Wireshark’s Display Filter syntax, Capture filters use Berkley Packet
Perhaps a top 15 Wireshark Capture Filter List Read More »
