User`s guide

Authentication
Chapter 8 Users, Security, and Authentication 150
Authentication
The Digi Passport unit supports multiple methods of user authentication,
including local, TACACS+, RADIUS, RADIUS Down-Local, LDAP,
Kerberos, and Custom PAM. The authentication protocol depends on the
environment.
PC
Connection request
Authentication
server
Serve
r
1.
2. Query
User ID
3. Accept
User ID
4. Access granted