Introduction As a WiFi admin, you are probably familiar with WiFi Data Rates and the concept of DRS (Dynamic Rate Switching/Shifting/Selection). Numbers like 6Mbit/s, 54MBit/s, 144MBit/s, 300MBit/s and 400MBit/s all look pretty familiar – but what are they based on? The numbers are not random at all – the data […]
Yearly archives: 2018
6 posts
Introduction Whether we are designing, troubleshooting or just reading about Wireless LANs, we come across the catchword ‘ACI’ (Adjacent Channel Interference). While most people are familiar with the concept of Overlapping ACI in the 2.4GHz frequency band (‘Don’t use Channel 1 and Channel 2 in neighboring BSSes, because they overlap’ […]
Introduction The goal of the 802.11w amendment, which was ratified in 2009 and consolidated in the IEEE Std 802.11-2012, was to introduce a way to secure management frames against attacks. The best known attacks this amendment should eliminate are the “deauthentication” and “disassociation” attacks, which can be used for multiple […]
Introduction Many times, there are small adjustments you have to implement in your live Wireless LAN environments. I personally am often faced with changes like these: – Adding a new SSID – Removing an unused SSID – Renaming an existing SSID – Changing the security settings (for example PSK) of […]
Introduction If you intend (or already are) providing a “Professionally Maintained Public Wireless LAN Access Point” in Switzerland, you are affected of the new article (Art. 19 Abs. 2 VÜPF) that became effective on March 1st 2018: Original: Art. 19 Abs. 2 VÜPF: ‘Die FDA haben bei professionell betriebenen öffentlichen […]
Introduction In this blogpost, I’d like to show you how a single SSID with both 802.1X & PSK enabled looks like, what the use-cases for this constellation are, and what could go wrong when you decide to implement it. Warning in advance: Use this option with caution – there are […]