SSL + Entrust GSSO

My domino servers have SSL. For applications need authentication we use Entrust authentication in iPlanet. The port for domino server is 85, and 80 for iPlanet server. Now I want to register some SSLed applications which require authentication thru iPlanet. My question is:

Do I need to create a secure instance on iPlanet again?

The Domino server already has SSL.

Thanks!