CellStream, Inc.

CellStream, Inc. Internetworking, Technology Consulting, and Telecommunications Hands On Training Classes We want to change the network.

We want to accelerate voice and video convergence over the Internet. We want to see creativity increased in telecommunications and networking. We want to see solutions without needless restrictions. We believe that anyone can master these technologies. We believe that anyone can innovate in this industry. Those are our beliefs and our motivations.

The ultimate Earth Status screen - when you need an Earth Status Monitoring at your desk 24/7!
10/17/2026

The ultimate Earth Status screen - when you need an Earth Status Monitoring at your desk 24/7!

Monitor global disasters and emergencies in near real time, including earthquakes, storms, floods, fires, volcanic activity, epidemics, and major incidents.

What services are offered in my area? Helpful personally and for telecom business. Start here:
10/17/2026

What services are offered in my area? Helpful personally and for telecom business. Start here:

Learn how to find broadband services and Internet providers in your area using availability maps, provider data, speeds, and technology information.

Let's talk about extension headers. Should we use them? Does the network support them? Want to learn what they look...
10/16/2026

Let's talk about extension headers. Should we use them? Does the network support them? Want to learn what they look like? https://www.cellstream.com/2022/04/10/ipv6-eh-repository-pcaps/

Download IPv6 Extension Header PCAP files for Wireshark analysis, research, training, and studying IPv6 extension header behavior and packet structure.

What exactly is the 169.254.x.x IPv4 address and why do I see it? Great question and here is your answer:
10/16/2026

What exactly is the 169.254.x.x IPv4 address and why do I see it? Great question and here is your answer:

Learn what a 169.254 IP address means, how APIPA works, why DHCP failure causes it, and how to troubleshoot and fix 169.254.x.x addressing.

NIST Special Publication 800-183 serves as a guide to addressing the security challenges prevalent in the realm of Netwo...
10/16/2026

NIST Special Publication 800-183 serves as a guide to addressing the security challenges prevalent in the realm of Networks of 'Things' (NoT), often referred to as the Internet of Things (IoT)

Learn what NIST SP 800-183 covers, including Networks of Things, IoT architecture, security, reliability, trust, and distributed system concepts.

Check out my References repository on and if you think something is missing let me know:
10/16/2026

Check out my References repository on and if you think something is missing let me know:

This is my IPv6 References repository. Contribute to amwalding/ipv6-ref development by creating an account on GitHub.

Creating documentation or training on packets and their contents is so easy with here's how: https://www.cellstream.c...
10/16/2026

Creating documentation or training on packets and their contents is so easy with here's how: https://www.cellstream.com/2020/11/03/wireshark-packetdiagram/

Learn how to use Wireshark's Packet Diagram feature to visualize packet structures, document protocols, and make packet analysis easier to understand.

One of the cool things has is the ability to create scripts. Now doing this from scratch would be boring, so in most ...
10/15/2026

One of the cool things has is the ability to create scripts. Now doing this from scratch would be boring, so in most systems that have nmap installed, there are a really great set of scripts included:

Learn how to use Nmap NSE scripts for advanced network scanning, discovery, service detection, and deeper analysis of hosts and network services.

Let's dig a little deeper into scanning techniques in this post:
10/15/2026

Let's dig a little deeper into scanning techniques in this post:

Learn advanced Nmap scanning techniques including SYN, ACK, UDP, ARP, OS detection, traceroute, IPv6 scanning, and host discovery.

nmap ("Network Mapper") is a free and open source (license) utility for network discovery and security auditing that has...
10/15/2026

nmap ("Network Mapper") is a free and open source (license) utility for network discovery and security auditing that has been around since 1997. Get started here:

Learn how to get started with Nmap for network discovery, host scanning, service detection, troubleshooting, and basic security testing.

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9812 Zembriski Drive
Plano, TX
75025

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