How To Enable OpenOTP Authentication On Juniper-Pulse Secure This document explains how to enable OpenOTP authentication with Radius Bridge and Juniper SSL VPN. 1. WebADM/OpenOTP/Radius Bridge For this recipe, you will need to have WebADM/OpenOTP installed and configured. Please, refer to WebADM Installation Guide and WebADM Manual to do it. You have also to install our Radius Bridge product on your WebADM server(s). 2. Register Your Juniper VPN In RadiusBridge On your OpenOTP RadiusBridge server, edit the /opt/radiusd/conf/clients.