OpenVPN Behind PfSense on Separate server how to - Help

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I have a OpenVPN-AS server on Ubuntu behind PfSense with a static public ip address. I am not able to connect to the VPN. If any one has done this, could you post a step by step guide Please.

Any help would be appreciated. I have been working on this for weeks but all guides on the internet are based on running VPN on the same box as PfSense.