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. So let’s explore. […]
The Linux ‘ip’ Command in Networking Read More »
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,” and RFC 2992,
Detecting ECMP in Linux using Paris and Dublin Traceroute Read More »
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 way to go.
Wi-Fi Network Monitoring & Manipulation in Parrot Linux Read More »
Since we published the Linux Networking Commands article in October 2017, I have had several comments that I should have included the “My Trace Route” command. Ofcourse, readers were correct, but I felt that this tool deserved its own article. Some of you, depending on what version of Linux you use may not have even
My Traceroute in Linux Read More »
If you attend our WLAN Operations course, one of the things we discuss is Active Scanning. Your system uses your saved Wi-Fi networks to actively scan for those networks (probing). There are potential security risks in this, especially with free networks. Most students conclude they should not remember networks in this way. The burning question
Deleting Remembered Wi-Fi Networks in Windows, MacOS, and Linux (Debian) Read More »
Hi everyone! Being able to decrypt the encrypted contents of packet captures is very important if you want to troubleshoot anything above Layer 4. This is even more important today as the network is evolving to QUIC where everything is encrypted. Check out these great references as well: Our custom profiles repository for Wireshark Our
TLS Decryption in Wireshark Using Key Log Files in Windows, MAC, and Linux Read More »
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 At a recent course I taught in New England, one of the students wanted to capture Wi-Fi packets on their Windows Surface Pro. Of course, I referred them to my
Capturing Wi-Fi WLAN Packets in Wireshark on Linux Read More »
So often we use Linux as a virtual machine or even as a test or capture system. If you are a little rusty on Linux, or brand new to it, there is a lot to learn. This article is like a mini starter course on Linux. I have built this mini course by condensing some
Getting Started with Linux – A Beginners Linux Mini-Course 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 The following is a list of IPv6 operations and their associated How To links for Ubuntu. Please feel free to comment on additional links that others can use: Ubuntu
Links to Ubuntu IPv6 How To’s 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 Here are some great Linux command line entries you can make to examine and configure IPv6 (assuming your version of Linux ipconfg does so). Let’s start with some simple ones.
IPv6 Linux Command Line Examples Read More »
We have previously written praise for Ubuntu as an operating system. The regular Ubuntu desktop OS can be found here. Some of you may prefer the Ubuntu Server that can be found here. If you install the Ubuntu Server, when the system boots the first time, you will find out very quickly that by default
Installing the Desktop for Ubuntu Server Read More »
This is a great question. First, you have probably learned that you can use Ubuntu’s APPLICATIONS > INTERNET> TERMINAL SERVER CLIENT program to remote desktop to Windows machines. Going the other way is a bit more challenging. You need to have two things in place: 1. You must enable remote desktop connections in Ubuntu. You
How do you Remote Desktop from Windows to Ubuntu? Read More »
Ah – a common problem. Wireshark has installed and does not see any of the computer interfaces so you can do captures. The answer to your problem is simple! You need to give the Wireshark application root priviledges. Ubuntu Solution In Ubuntu, the best way to fix this (and any other application that needs root
How do I get Linux/Ubuntu to show interfaces in Wireshark? Read More »
If you own a Netbook or laptop, you may be surprised by the new default look of the latest Ubuntu release. I have tried to like it on my Netbook. I have completely complied with the neverending typing of application names to find my common apps. Some of my colleagues have reported horrible problems, but
Fixing the Ubuntu 11.x User Interface Read More »
This article is directed at my many Independent Telephone/Rural Local Exchange company friends. It is the details behind a story I often talk about at conferences and training sessions. One of the main challenges for the RLECs is to up the “take-rate” of broadband in their served area. There are a number of barriers we
Turning Old Computers into Tools for Subscribers Read More »