Example IPv6 SYN Flood Attack
Example IPv6 SYN Flood Attack
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Tips Tricks, How To’s, and Stuff
This section contains general information, tips and tricks, light reading, entertainment and other general fodder. Enjoy!
Tweaking the Wireless Interface – Power Settings, Country etc. in Linux
I was asked in a recent WLAN class whether you can adjust the power level in a Wi-Fi radio. The answer is yes (if you have the right operating system), and here is how. For this demonstration, I am using Kali Linux but this should work on any Linux. Comment below if you can confirm
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A Terminal Version of tshark – we love it!
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 Just introduced this week is a terminal version of tshark that looks like the Wireshark GUI call termshark. Why? Let’s say you run either Virtual Machines or Servers without a
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How To Observe if the Web Site you are Browsing Uses QUIC
We started to notice QUIC back in 2017. For an overview of QUIC you can see my article here: https://www.cellstream.com/2018/03/07/is-there-a-lot-of-quic-in-your-packet-captures/ How do you know if a given web site uses QUIC/gQUIC? It is a great question, and can be easily answered if you are using Google Chrome (which, by now you should be!). First, you
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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 Our other Wi-Fi related articles If you are like me, you count on the Internet to help with how to’s especially when using Linux. That said, sometimes the information can be contradicting or confusing. This
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Getting a Virtual Machine to Access Wi-Fi Monitor Mode
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 In our article on putting your WLAN Wi-Fi interface into Monitor Mode so you can sniff Wi-Fi packets and troubleshoot WLAN’s, we said that if you are running
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IPv4/IPv6 Path MTU (PMTU) Discovery Demystified
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 A major change in the behavior of IP networks between IPv4 and IPv6 is that in IPv6 networks, all hosts are required to support something called Path MTU (PMTU) discovery.
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Creating Delay to a Subnet Tech Tip
I received a question on how to create a delay to a subnet using GNS3. Below is my answer:
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GNS3 in Linux – Tech Tip – Docker Error
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 been Windows based.
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The Linux ‘ip’ Command in Networking
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.
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Detecting ECMP in Linux using Paris and Dublin Traceroute
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,
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Linux Starting Point – Commands You Need To Know
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 would be simple
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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 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 Shell, and MAC-OS.
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IPv6 Settings (SYSCTL) on Linux
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 most system settings
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Using Wireshark to capture between VirtualBox VM’s
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 either Npcap or
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