radcli (or libradius-client) need to be installed before ocserv. If ocserv is compiled before radius libraries, it will build without >radius support. Even if radius libraries are compiled/installed afterwards, it will not work, and ocserv will return errors when you >try to start the service with RADIUS authentication enabled.
Can we get the dependancies for OTP and Radius to be able to support two factor authentication? both locally and using Radius.
https://docs.openconnect-vpn.net/recipes/ocserv-2fa/
https://docs.openconnect-vpn.net/recipes/ocserv-authentication-radius-radcli/