RADIUS authentication explained
How RADIUS checks who may join a Wi-Fi network or a VPN: the NAS, the server and the shared secret, the four messages, accounting, 802.1X with EAP, the protocol's weaknesses and how RadSec fixes them.
CodexBash, , 5 min read
When you connect to your office Wi-Fi with your own username and password, rather than one shared Wi-Fi password, RADIUS is almost certainly checking you. It is the protocol network equipment uses to ask "may this person on?", and it has been doing that job since the dial-up modems of the 1990s. Today it guards enterprise Wi-Fi, VPNs, switches and the routers of internet providers. This article explains how it works and where its weaknesses are.
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