OpenVPN Users Authentication

[IT-META]

Hello,

I want to setup OpenVPN on my Netgate 6100 for my remote workers.

Actually, I have no LDAP and Radius Servers on my network.

I have setup a Keycloak instance which is operationnal to do the link with my Entra ID server for the authentication on all my applications. I also have an internal PKI for my applications and my network equipements (hypervisor, firewall, etc.). I can create user certificate with this PKI.

Can I use keycloak for the users authentication ? If not, what is the best solution you recommend

Thanks in advance.

Steve