You can configure NetScaler Gateway to use one-time passwords, such as a token personal identification number (PIN) or passcode. After a user enters the passcode or PIN, the authentication server immediately invalidates the one-time password and the user cannot enter the same PIN or password again.
Products that include using a one-time password include:
To use each of these products, configure the authentication server in the internal network to use RADIUS. For more information, see Configuring RADIUS Authentication.
If you configure authentication on NetScaler Gateway to use a one-time password with RADIUS, as provided by an RSA SecurID token, for example, NetScaler Gateway attempts to reauthenticate users by using the cached password. This reauthentication occurs when you make changes to NetScaler Gateway or if the connection between the NetScaler Gateway Plug-in and NetScaler Gateway is interrupted and then restored.
An attempt to reauthenticate can also occur when connections are configured to use Citrix Receiver and users connect to the Web Interface by using RADIUS or LDAP. When a user starts an application and uses the application, and then returns to Receiver to start another application, NetScaler Gateway uses cached information to authenticate the user.