Is there an SSH client for DOS 6.22 or Windows 3.1 that supports certificates and could be used to connect to AWS or Azure instances, or any other server for that matter? I have another laptop restoration I'm hoping to finish this week, want to find a cool purpose for it rather than just sit there and gather dust.
If you could use Java on Windows 3.1 there is a SSH client written in pure Java that would work. I use one on a desktop Java system that has been running for 12 years on Windows to avoid having an SSH tunnel. If it works on an old version of Java that still runs on 3.1 is another question.