Cookie security settings?
Ah, sorry.. I missed that bit
If you put a plain php file in the root, can you access that via SSL without issue?
It should be pretty environment agnostic, even on those versions
It might be worth a try
hmm.. I'm assuming it was in 3.1.. I can't remember that far back!
Have you added
Director::forceSSL() in the config?
It shouldn't be. It would usually only be a problem if there was one forcing a direction with http
Is the base url set somewhere? Config files, etc?