## Second Level Authentication Parallels RAS allows you to use two-factor authentication for access control by configuring a second level authentication. When second level authentication is used, users will have to authenticate through two successive stages to get the application list. While the first level authentication will always use native authentication (Active Directory / LDAP), the second level can use one of the following: RADIUS SafeNet Deepnet Second level of authentication is more secure because instead of using a standard username and password, it uses a static username and a one-time password generated by a token. Second Level Authentication can be configured from the Second Level Authentication tab in the Connection category.