Use OVH Network Firewall with outgoing VPN connection

Hello all,

I have a Kimsufi dedicated server running as a camserver with Ivideon Server
Now this machine has to connect to my Synology RT6000AX at home using OpenVPN
This connection is working fine without problems
The server only has the client of OpenVPN installed and not the server
The router has the server running on it
Now whenever I enable the OVH Network Firewall to allow only the SSH traffic from my home IP adress my OpenVPN connection gets lost and Ivideon can no longer access any of my IP Camera's
Since this is not an incoming connection on the server but an outgoing connection on the server how can I fix this?

Been searching on the community for some time this evening but I can only find problems where the connection is incoming to the server

Kind regards,
Ray