Please follow the guide found at the Clavister forum in order to Protect cOS core Remote Management with two factor authentication using PhenixID MFA server.
https://forums.clavister.com/viewtopic.php?f=8&t=6364
DISCLAIMER
Information provided in this document is for your information only. PhenixID makes no explicit or implied claims to the validity of this information. Any trademarks referenced in this document are the property of their respective owners.The origin of this information may be internal or external to PhenixID. PhenixID makes all reasonable efforts to verify this information.
PhenixID - support.phenixid.se