How to set up OpenVPN with Google Authenticator on pfSense

This article explains how to set up OpenVPN with Google Authenticator on pfSense. I’m using pfSense 2.4.2 but the method shouldn’t change much. If you follow along you’ll end up with a VPN server that asks for the user’s username, a pre-set PIN (4-8 numbers) and a one-time generated code …

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