Mini ISP using OpenVPN between 2 Pfsense boxes

[sanmoi]

Hi;

We are trying to setup an OpenVPN connection between 2 pfsense boxes using radius authentication and accounting. The goal is to collect remotes and control their usage volume.

The central Pfsense is configured in Remote access (SSL/TLS + user auth). Authentication is set to our Radius and is working as expected from the diagnostic tab.
The WAN interface allows remote OpenVPN traffic (UDP * * WAN address 1194(OpenVpn) * * OVPN)

My issue is with the remote Pfsense:
It is configured as Peer to peer (SSL/TLS) and the username fields are filled. Still  nothing seem to happen. The OpenVPN status remains down and I fail to receive any packet on the server's interface (ping is working fine).
Am I missing something here? Like a firewall rule or some kind to allow the OpenVPN client to start.

The current OpenVPN interface has a rule allowing all IPv4 traffic to any host using any protocol.

If someone can help or point me to the relevant documentation that would be nice.