I've always wanted to find a cost effective way to implement 2-factor authentication. Commercial solutions are expensive, and if you are a small business, you might not want to spend a small fortune on implementing an enterprise solution with hardware tokens. I stumbled across Google Authenticator a while back and started to wonder how it can be used to implement a free 2-factor authentication solution in my lab. I also found a few posts that suggested teaming it up with Freeradius and that's really where this post started.

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@drusse11 Cool! Thanks! I shall have a look. I've been so rammed with work, that I've not had the time to get this… https://t.co/HWz73UDZND
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