|   | 
The following user authentication methods are supported in the Tectia client/server solution.
Table 5.1. User authentication methods supported by the Tectia client/server solution
| Authentication method | Tectia Server | Tectia Client and ConnectSecure | ||
|---|---|---|---|---|
| Unix | Windows | Unix | Windows | |
| Password[a] | x | x | x | x | 
| Public-key | x | x | x | x | 
| Certificate | x | x | x | x | 
| Host-based | x | x | x | |
| Keyboard-interactive | x | x | x | x | 
| PAM[b] | x | x | x | |
| RSA SecurID[b] | x | x | x | x | 
| RADIUS[b] | x | x | x | x | 
| GSSAPI/Kerberos | x | x | x | x | 
| [a] On SELinux enabled systems, password method uses PAM internally on the server side. [b] Through keyboard-interactive. | ||||