I am often asked this question of where to access PCAP or PCAP-NG files so that folks can explore packet captures using Wireshark. I have always provided these resources in my Wireshark classes at the Online School, but thought I should also just list them here for public consumption. Look up the hashtag “captureeveryday” in […]
Where can I get PCAP Packet Captures for Learning and Exploration? Read More »
This blog article is a culmination of my years of experience in the networking and computing worlds. Over those years, where I began as a bench and field technician, I have had a number of classes that my employers sent me to to teach troubleshooting skills. Usually termed with the words “logical troubleshooting” or something
A Dive Into Network Troubleshooting Read More »
An essential function when administering a Linux system is viewing, configuring and managing users and groups. I cover adding users in this article: https://www.cellstream.com/2022/04/06/using-the-useradd-command-to-create-user-accounts-in-linux/ That said, viewing users is done using a few simple commands. How To View Users on a Linux System Every user on a Linux system, whether created as an account for
Viewing Users/System Users on Linux Read More »
Like most operating systems, Linux can have multiple user accounts. The system administrator or root account, or users with sudo privileges are responsible for managing these users, as well as managing those accounts. Linux is a multi-user system, which means that more than one person can interact with the same system at the same time.
Using the useradd Command to Create User Accounts in Linux Read More »
I have been teaching Hands On IPv6 courses since 2011 – OMG thats 10 years plus!!! Over the course of time, the Internet Engineering Task Force and various companies have been expanding and detailing IPv6 implementation and specification. As our students know, we are very diligent updating our courses thanks to our Online School and
A Better and Complete IPv6 Bibliography Read More »
OK – so this article is for entertainment of all us network nerds. As many already know, pretty much every year, the Internet Engineering Task Force (IETF) releases humorous RFC’s – jokes. Usually these happen on or about April 1st to commemorate April Fools Day. Without doubt, some of these are classic and hilarious.
Humorous and April Fools Day RFC’s Read More »
Got to thinking the other day. What are the world’s most important RFC’s (Request for Comment specifications)? I decided to make a list. While the following are not in any order, I tried to base them (mostly) on date. While TCP came first, I still put the Internet Protocol on the top of the list.
The World’s (Generally) Most Important RFC’s of the Internet Read More »
CellStream, Inc. PRIVACY STATEMENT Your privacy is important to CellStream, Inc. (CSI). This privacy statement provides information about the personal information that CSI collects, and the ways in which CSI uses that personal information. Personal information collection CSI may collect and use the following kinds of personal information: Information about your use of this website;
CellStream, Inc. Privacy Statement Read More »
Hi everyone! Happy Thanksgiving 2021. Just released – Wireshark 3.6.0!!! Why is this important to me, you, and everyone who troubleshoots Voice traffic using Wireshark? Well, there are many changes to the voice related functionality in Wireshark in this (actually as part of the development 3.5.0 – you can read more on that here) release.
Important Updates to Wireshark for Voice and VoIP Read More »
From a news channel this evening: “The FBI and CISA are aware of the incident this morning involving fake emails from an @ic.fbi.gov email account,” the FBI said in a statement. “This is an ongoing situation and we are not able to provide any additional information at this time. The impacted hardware was taken offline
FBI Email System is Hacked Read More »
It is the morning after. Approximately 24 hours ago, Facebook, WhatsApp, Instagram, and more, went down. Why? How? From the early indications of what is being said, I don’t think the general public will ever be told the whole truth. This is especially going to be the case if there is a design problem with
What will be the truth regarding the Facebook Outage of 10/4/21? Read More »
CellStream, Inc. – Telecom Consulting and Training! 2-Day Instructor Led Hands On Lab Class Available in either Web Based delivery or On-Site Delivery Minimum 10 students – Maximum 20 students Course Description: Knowing the fundamentals of Wi-Fi 6 and Security as these subjects pertain to Wi-Fi/Wireless LAN Operations is vital to anyone who is in
CSI-HO-035 – Wi-Fi 6 and Wi-Fi Security in the Wireless LAN Read More »
Hi Everyone! If you are like me, you use Wireshark every day. For me that means troubleshooting many different network applications and traffic types, including Voice traffic – VoIP. With the development release of Wireshark version 3.5, the Wireshark folks announced some significant changes coming to the Voice capabilities set within Wireshark, and I hope
Wireshark 3.5 Development Release adds significant voice upgrades Read More »
1 Day Instructor Led Technology Overview/Briefing Available in either Web Based Delivery or On-Site DeliveryWeb Based Delivery: Max class size is 50On Site Delivery: Max class size is 30 Course Description: Google introduced one of the most significant changes to the Layered Model of telecommunications when it introduced QUIC (see our articles here, and here,
CSI-TB-007 – QUIC Redefines the Transport Layer – A Technical Overview/Briefing Read More »
1 Day Instructor Led Technology Overview/Briefing Available in either Web Based Delivery or On-Site DeliveryWeb Based Delivery: Max class size is 50On Site Delivery: Max class size is 30 Course Description: For the first time in history, we are seeing the deployment of cellular mobile networking technology in commercial enterprises, to solve in-house business problems.
CSI-TB-006 – CBRS Solutions in the Enterprise Technical Overview/Briefing Read More »
