16. Annex 8: TACACS Based Authentication Support In OSM
Terminal Access Controller Access-Control System (TACACS) refers to a family of related protocols handling remote authentication and related services for networked access control through a centralized server.
OSM NB has a plugin which can interact with TACACS server to authenticate users.
16.2.1. Prerequisite for Integration
TACACS host ip address reachable from OSM.
TACACS server secret(or password).
16.2.2. Integration Steps
Configure NBI to use TACACS plugin, by modiifying
authentication.tacacs_hostas TACACS host ip
authentication.tacacs_secretas TACACS server secret
16.3. Testing Steps
16.3.1. Prerequisite for Testing
Ensure users are present in TACACS server, which can be used for authentication.
Configure OSM as mentioned above.
Login with credentials present in TACACS server.
OSM User with
system_adminrole or similar can assign project role mapping.
TACACS users can log in using their credentials.
Since TACACS is used as read-only service, username update and password update shall not be allowed via OSM. User credentials need to be updated by TACACS admin in TACACS to reflect. However, OSM admin can handle project role assignment as required.
If user profile is removed from TACACS server, OSM still maintains the profile and will not be removed until next login. As the profile is not available in TACACS, the authentication shall fail and user profile will be removed from OSM.