HID ActivID 4TRESS AS and Citrix XenApp - Manual (Page 3)

ActivIdentity 4TRESS Authentication Server | Handbook: Configuring Citrix® XenApp™ for Two-Factor Authentication P 3
External Use | May 31, 2012 | © 2012 ActivIdentity
<add key="RADIUS_SECRET_PATH" value="/radius_secret.txt" />
<add key="RADIUS_NAS_IDENTIFIER" value="4TRESS FQDN" />
<add key="RADIUS_NAS_IP_ADDRESS" value="4TRESS SERVER IP ADDRESS" />
5. Create a radius_secret.txt file and add it to the following directory (as illustrated next):
C:/inetpub/wwwroot/Citrix/XenApp/conf