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Showing posts with the label Wi-Fi

Availability of 5 GHz WLAN Channels in India under unlicensed band

Availability of 5 GHz WLAN Channels in India under unlicensed band  In India, Wireless Planning and Coordination Wing of Department of Telecom, under Ministry of Communication takes care of licensing of radio frequencies.  In the latest National Frequency allocation plan 2018 (, Government of India (GoI), exempted the licensing requirements of the following radio frequency ranges for wireless usage and a gazette notification has also published for this (  -- 1.  5150-5250 2. 5250-5350 3. 5470-5725 4. 5725-5875 References

Identity PSK ( iPSK)

With the evolution of IoT (Internet of Things), devices that connect wirelessly have increased many folds. From webcams, Smartwatches, fitness bands, firestick, Alexa, Google Home, and many more.., everything is going wireless for connectivity and so does the security threat. The main concern with IoT devices is the unavailability of the full wireless protocol stack (and in the majority of devices, support of 802.1x is not available). So, previously we only have the WPA-PSK option for connecting the IoT devices.  In WPA*-PSK (WPA or WPA2) WLAN, a Pre-Shared Key (PSK) is configured and distributed to all the clients that connect to the WLAN. This leads to PSK leakage, and it can be accessible to unauthorized users (due to the nature of common PSK across all the devices).  Therefore, there was a need to provision unique PSK or Multiple PSK per SSID. Identity-PSKs are unique pre-shared keys created for clients/groups on the same WLAN. Features of iPSK:-   1.Unique PSK for individual Cli

Analysis of IGI Airport Wi-Fi setup

The access points installed at T3, IGI Airport, New Delhi are of Cisco make, Internal access points with internal antennas. This is depicted in the below images – Cisco access points can be installed in two modes – i.                Lightweight installation – In this mode, access points make a secure tunnel with the wireless controller and pass all the user traffic to the controller. Based on configuration, controller take appropriate actions and process the traffic.   Advisable for large/enterprise setup. ii.               Autonomous installation – In this mode, access points play the role of controller also and process the traffic as per policy. Ideal for small setup. I roam around at various corner of the floor after connecting to wireless and I didn’t face any connection drop (or re-authentication issues). This is a roaming functionality which usually possible only in controller based model. This cause me be