Post Views: 2,400 I recently watched a YouTube video where one of the GNS3 creators was talking about GNS3 and how it runs. This convinced me to consider moving my GNS3 development work to the Linux world. I had done this years ago for the hands on training classes but my own development environment has […]
GNS3 in Linux – Tech Tip – Docker Error Read More »
Post Views: 6,302 One way to examine your network configuration in Linux is to use the “ip” command. I have attached a cheat sheet from Red Hat. By itself, it will show its options: So much going on here, and I find the help and man pages to be light on clarity and examples.
The Linux ‘ip’ Command in Networking Read More »
Post Views: 6,976 Equal-Cost Multi-Path (ECMP) is a forwarding mechanism for routing packets along multiple paths of equal cost with the goal to achieve almost equally distributed link load sharing. This, of course, significantly impacts a router’s next-hop (path) decision. For further details, look at RFC 2991, “Multipath Issues in Unicast and Multicast Next-Hop Selection,”
Detecting ECMP in Linux using Paris and Dublin Traceroute Read More »
Post Views: 1,702 My recent blog post regarding Linux being the operating system of choice if you are supporting/testing/operating a network has spawned some great discussion. Emerging the discussion has come a request to write up a starting point list of commands for Linux beginners. I said “Sure, I can do that!” I thought it
Linux Starting Point – Commands You Need To Know Read More »
Post Views: 2,817 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
What is the ‘cat’ command, and how can I use it? Read More »
Post Views: 6,922 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
IPv6 Settings (SYSCTL) on Linux Read More »
Post Views: 12,240 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: As more and more networks undertake the Internet Protocol Version 6 (IPv6), details
CSI-HO-018-B – Hands On Advanced IPv6 Security Read More »
Post Views: 7,252 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
Using Wireshark to capture between VirtualBox VM’s Read More »
Post Views: 13,451 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
Zenmap – the nmap GUI Read More »
Post Views: 13,273 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
Advanced nmap – the nmap Scripting Engine (NSE) Read More »
Post Views: 1,532 In a recent video call with a service provider technical lead, it seemed that every question I answered, whether it was about Wi-Fi or network testing/analysis or troubleshooting, I kept referring to, and sharing what I could do on my Linux laptop. It was not surprising that toward the end of the
Time for Rural Service Provider Technical Teams to Adopt Linux Read More »
Post Views: 22,568 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
Wi-Fi Network Monitoring & Manipulation in Parrot Linux Read More »
Post Views: 22,045 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 What Students are Saying About this Class: “[Instructor] covered the information incredibly well and all
CSI-HO-028 – Hands-On Advanced L3 Routing with BGP and OSPF Read More »
Post Views: 2,151 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,
GeoIP Add In for Wireshark 2.6 and Later Read More »
Post Views: 85,123 Great question! First things first – we offer three fundamentally different types of courses: a) Self Paced Public courses that are open to anyone wishing to attend b) Public Web Based or In Person Courses that are also open to anyone wishing to attend. c) Private courses that are closed to all, except the folks associated
How Do I Register for A Course? Read More »
