Filr clients for mobile devices and workstations use a REST protocol for Filr authentication. Inside the protocol are the user-supplied credentials. Filr validates these against the identity source (LDAP or local) or against the OpenID provider.
Web access is through either the Web form or OpenID. If the Web form is used, Filr takes the credentials supplied and validates them as with REST. If Open ID is used, Filr honors the authentication provided by the OpenID provider.
This is illustrated in Figure 4-1.
Figure 4-1 User Authentication in Filr