• Telecommunications Consulting

    Telecommunications Consulting

    Consulting Services from Network Design to Project Management Read More
  • Internetworking Training Experts

    Internetworking Training Experts

    Click on Training and then Courses. Read More
  • Wireshark Experts

    Wireshark Experts

    Packet analysis expertise is critical in today's networks, and being able to use the best packet analyzer application is a skill we can help you and your team attain. Read More
  • Are you a Network Scientist?

    Are you a Network Scientist?

    Online Learning, Instructor Led in person or Web-based delivery. Check out our online school. Read More
  • Online Certification Training

    Online Certification Training

    Find out about our Network Self Certification Program for Rural Service Providers here! Read More
  • IPv6 Experts

    IPv6 Experts

    Along with other Internet regions, ARIN is out of IPv4 Addresses. Are you IPv6 fluent? Are you IPv6 ready? Read More
  • Enabling the IoT with Wireless

    Enabling the IoT with Wireless

    Without wireless, we cannot have the Internet of Things. Read More
  • MPLS Book for iPad and iPhone

    MPLS Book for iPad and iPhone

    Get Mr. Walding's book here! Read More
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Welcome to CellStream, Inc. - Telecom Consulting and Training!

Welcome to our home on the Internet, where we can not only share information, but also interact with each other. If you are a visitor to the site, there are a number of things to view: our FAQ'sNetworking and Computing Tips, our CellStream Blog, and other fun reading can all be found in the drop down menus above.  The Training menu provides access to our courses, our course calendar, and learning services.  The Consulting Menu provides information on our consulting services and a place to meet our consulting and teaching team.  Registered CellStream folks and our clients will log in using their private credentials to access projects, calendars and discussions.

Thanks for visiting! We always welcome comments and suggestions.  You can also join our Slack channel here!

Our Latest Content

  • BGP Autonomous System (AS) Numbers

    BGP Autonomous System (AS) Numbers

    In a recent class I was asked for some details on BGP Autonomous System (AS or ASN) Numbers.  I thought

    Read More
  • Leveraging the Linux Logger

    Leveraging the Linux Logger

    In this article I want to visit a "not used enough" Linux tool called logger.  As with managing any system,

    Read More
  • Linux Security Focused Commands We All Need to Use

    Linux Security Focused Commands We All Need to Use

    Too many people shrug off Linux for fears of security with a free and open source operating system, even today. 

    Read More
  • IPv6 Extension Header PCAP Repository

    IPv6 Extension Header PCAP Repository

    Hello my Networking and IPv6 researchers and enthusiasts. I just started a PCAP repository at Github for IPv6 Extension Header

    Read More
  • Where can I get PCAP Packet Captures for Learning and Exploration?

    Where can I get PCAP Packet Captures for Learning and Exploration?

    I am often asked this question of where to access PCAP or PCAP-NG files so that folks can explore packet

    Read More
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Our Most Popular Articles

  • What is the 'arp' command, and how can I use it?

    What is the 'arp' command, and how can I use it?

    Let's answer the question, but before I do, you can watch my ARP lesson on Youtube here: https://youtu.be/aD_caJxD7nY and look at the

    Read More
  • A Great Toolkit for Presenters - Zoomit!

    ZoomIt is a utility for the public speaker in all of us. When presenting information, sometimes it is helpful to

    Read More
  • 3 Ways to put your Wi-Fi Interface in Monitor Mode in Linux

    3 Ways to put your Wi-Fi Interface in Monitor Mode in Linux

    Check out these great references as well:   Our Wireless custom profile for Wireshark  Our Udemy course on Wireless Packet capture

    Read More
  • Neighbor Discovery (ND) Table in IPv6 Windows, Linux and MAC Machines

    Neighbor Discovery (ND) Table in IPv6 Windows, Linux and MAC Machines

    Check out these additional IPv6 Resources: Our IPv6 overview course at Udemy Our IPv6 Custom Profiles for Wireshark Our IPv6

    Read More
  • What is the 'cat' command, and how can I use it?

    The 'cat' [short for “concatenate“] command is one of the most frequently used commands in Linux and other operating systems. The

    Read More
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