Thank you so much for the info! I will try this out.

From: stunnel-users <stunnel-users-bounces@stunnel.org> On Behalf Of Harris, Douglas (SSC/SPC)
Sent: Wednesday, June 20, 2018 5:08 AM
To: stunnel-users@stunnel.org
Subject: Re: [stunnel-users] stunnel used as jump host for SFTP

You can accomplish this in Windows. Just add a  port forwarding rule to S:

netsh interface portproxy add v4tov4 listenport=22 listenaddress=[IP of S]  connectport=22 connectaddress=[IP of R]

-Doug