As mentioned in a recent form post...
...this seems pretty straight forward.Select only supports http you need a third party app to redirect if the customer needs https. The F1 help page states at the bottom of the page:
Security and Encryption
Important Note: Message level encryption has been removed with Select version 4.4 and above.
• To incorporate SSL security, System Admins must set up an HTTP off-loader from a 3rd party.
I think John Morris mentioned here ( viewtopic.php?f=16&t=1100 ) that ya'll use the Zen load balancer internally, at SoftPro. We use Zen internally, too. However, our attempts at getting this https connection test to work have not hit the mark so far.
Would you mind sharing what settings you use on the Zen load balancer to make it work using an https-based connection from the SPS client?