I wanted to test 802.1X/EAP-TLS in my Wi-Fi lab network and after some searches online I found a setup with the use of Jumpcloud as the Radius server, Keyfactor/EJBCA platform as my PKI instance, and an Ubuntu client.
Let us see how I did it
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802.11be/EHT/Wi-Fi 7 Frame Format and the Use of Content Channels
802.11ax/HE/Wi-Fi 6 introduced the concept of content channels in the HE preamble. This is further developed into the 802.11be/EHT/Wi-Fi 7 standard. Content channels are used in the EHT MU frame format and therefore, used in most of the EHT data frames sent between stations. This blog article will explain content channels setup for DL OFDMA frame on an 80 MHz channel, and in the end the setup for 20 and 40 MHz channels.
I did a presentation on the same topic for Candela Technology Summit 2025. This video is on YouTube.
So you have two choices: click on the picture for the video or read the rest of this article
1024-Bits Bitmap BlockAck in Action
802.11be/EHT/Wi-Fi 7 introduced 1024-bits bitmap in the BlockAck frame.
I have made a video where I explains an wireless capture in Wireshark where the stations use both 64, 256, 512, and 1024 bits bitmap in the BlockAck frame.
Ekahau ECSE Recertification Video Course and Exam
I decided to recertify Ekahau ECSE Design certification this week and here is a short wrapup for my experience
802.1X/EAP-TLS Deep-Dive, Record by Record
Have you ever wondered what happens during the 802.1X/EAP-TLS handshake?
Since I first learned about it during my CWNA study I have never fully understood this EAP-TLS handshake. But in the last few years, I have learned about TLS and how TLS is used on the internet. Since I have not seen any video regarding 802.1X/EAP-TLS online showing this I decided to make my own.
This is a 50 min YouTube video showing 802.1X/EAP-TLS record by record
Samsung Android S10 Association to WPA2-Enterprise (802.1X/EAP) enabled WLAN, PMK Caching
During WLPC_EU in Prague 2022 I attended Peter Mackenzie’s deep-dive “AP Packet Capture”.
During that, I discovered a strange association behavior for my Samsung S10 cell phone to a Mist AP.
Peter and I considered if it could be some kind of FILS authentication, but later testing rejects this.
BTW: this was one of my CWNE essays, the pdf is attached
My Journey to Pass the Cisco CCNP Encor test
I passed the Cisco CCNP Enterprise Core test (350-401, Encor) yesterday. It closed a long period of studying and preparing. To help other candidates to find study resources I will in this article describe which one I used.
Does an 802.11ax client use UL OFDMA efficiently?
During 802.11ax UL OFDMA TXOPs, clients that are assigned a resource unit (RU) by the AP for uplink data transmission will send data in that specific time slot.
But do clients use this time slot efficiently? Wireshark doesn’t give the answer
Let us have a deeper look in an example
802.11ax UL OFDMA in Wireshark
802.11 ax UL OFDMA is one of the new and key features of 802.11ax or WiFi6. I’ve been able to capture this in my lab network and in this article I will explain key elements on how I do it, and what I look for in this capture
Read More »802.11ax, to OFDMA or not to OFDMA
The 802.11ax amendment was built to increase the efficiency of WiFi. One of the new features is OFDMA or the capability to send data to several stations simultaneously, multi-user operations.
One of the benefits of OFDMA is to decrease the duration it takes to send the data to several stations in relation to single-user operations. Especially for smaller frame sizes, but for which?
In this blog, I will check the trade-off between SU and MU operations in 802.11ax for three typical scenarios.
You will be amazed, I was
Gjermund Raaen 