In this article we will show you how to secure your home network in a great way using IP Addressing. By making some simple changes to the way you address the home or small business network, you can easily provide visitors with Internet access, without exposing your own computers, appliances and servers to them. By […]
Securing a Home or Small Business Network Read More »
The Fundamentals of TCP/IP for Service Provider Managers / Engineers / Marketing Course Description: Attended by thousands of students around the country already, this one-day course is jammed with information and learning. This course focuses on the basics of the Internet, the OSI model, IP Addressing and subnetting, IP Routing, TCP and UDP operation
CSI-SP-001 – POTS to Pipes 1 Read More »
The following lab exercise is how to create an IPsec VPN on Cisco IOS. We originally created this lab as part of one of our courses, and we hope you find it useful. Lab Preparation This lab is designed to help you learn the basics of IPSec VPN’s and how Service Providers uses IPSec to
An IPsec VPN Lab Exercise Read More »
This article discusses our tips on “Parenting the Internet” from a technical perspective. What we mean is, that parents must carefully control the Internet usage in the home, especially when minors are involved. The Internet must be actively parented as we will discuss further. Also look for additional information in the following two articles:
Parenting the Internet 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 16 students Course Description: Knowing the fundamentals of Quality of Service (QoS) is vital to anyone who is in the
CSI-HO-015 – Hands-On Quality of Service (QoS) Read More »
The netstat (short for network statistics) command is a powerful diagnostic tool used to display various network-related information on a computer. It’s available on Windows, Linux, and macOS systems (though on newer systems it is sometimes replaced or supplemented by ss in Linux or Get-NetTCPConnection in Powershell). netstat helps you: Some useful applications for the
What is the ‘netstat’ command, and what can it do? Read More »
Let’s answer the questions, but before I do, you can watch my ARP lesson on Youtube here: https://youtu.be/aD_caJxD7nY and look at the lessons in the playlist:https://www.youtube.com/playlist?list=PL-nDeWT9WTjFT1syEIGsLTObjkx4XDOUt Check out some further ARP Resources: Our free ARP course at Udemy Our ARP custom profile for Wireshark Our chapter on ARP at the Online School Reference Library OK –
What is the ‘arp’ protocol and the ‘arp’ command, and how can I use it? Read More »
If you have a web/email server connected to the Internet that you want other to reach, that server must have a public IP address. Most Internet users don’t even try to remember the IP addresses of sites they use, instead they use the Universal Resource Locator system of typing www.cellstream.com or something like this into
Using a Dynamic DNS Service Instead of a Public IP Read More »
Here are some fundamental PC Troubleshooting Tips. We cant cover everything here, but if something below helps, great! PC Won’t Boot Into Windows Try “Safe Mode” FirstWhen your PC just won’t boot into Windows at all, you’ll probably want to start off with Safe Mode—use the F8 key right when the system starts up to
Some Basic Troubleshooting Tips for the PC/Networking Read More »
Here is a good question: At a recent POTS to Pipes you told us of the story of the customer that was upset with his local telephone company due to his internet being really slow, etc., and you had went through some steps that you could use to verify how many appliances a person actually
Determining What is Connected to a Customer LAN or WLAN with ColaSoft MAC Scanner Read More »
We recently received the following query via email (some content edited): I heard you speak a few weeks back and have a few questions regarding the “How to Parent the Internet” segment of your presentation. Is there a certain software required for blocking offensive content? Also, is there a standard way to block most or
Blocking Offensive Web Content Read More »
There is no one “great” answer to this question. Usually saving disk space also maximizes performance of your computing platform. We fundamentally recommend: a) proper maintenance (see other tips below) and b) the occasional ‘spring cleaning’ (as also discussed below) combined with the c) use of a utility to clean your unused space (we like
How can I save Disk Space? 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 It should be no surprise to anyone reading this article that the next generation IPv6 protocol is being exploited by hackers and attackers just like its predecessor IPv4. If you
The Security Weaknesses of IPv6 Read More »
I have always said, everywhere – at least at some level. It typically involves governments or authorities blocking or restricting access to certain content, websites, or services. Here’s a summary of where and how it’s done: Countries with Extensive or Systematic Internet Censorship: Highly Censored (Systematic Filtering & Control) Substantial Filtering or Selective Censorship Moderate
Where is the Internet Filtered or Censored? Read More »
I am not a very political person. However, I was fascinated by the following. The transcript below was copied from TED Talk – Omar Ahmad: Political change with pen and paper. It is inspiring and insightful…. One of the things that defines a TEDster is you’ve taken your passion, and you’ve turned it into stewardship.
How to Affect Politicians Read More »