In this document we are going to demonstrate how to implement two-factor authentication from WiKID for remote desktop on an Ubuntu 12.04 server using X2Go. The WiKID Strong Authentication System is a commercial/open source two-factor authentication solution. X2Go is an NX-based remote desktop tool. First, we will configure a domain on the WiKID server, then add the targeted server as a network client to the WiKID server, and finally configure the Ubuntu Precise box for x2go using pam-radius. Note that if you already have a server configured as an SSH gateway box with pam-radius, you can simply add X2Go to and it will work.