Hello, 2016-06-06 14:50 GMT+02:00 Andrey <processing77@gmail.com>:

Hi! How I can enable HTTP Strict Transport Security (HSTS) header on stunnel ?

You don't; stunnel does not know about HTTP headers (it is mostly protocol agnostic). You need to add the HSTS header in the web server that is actually serving the content. -- Guillermo Rodriguez Garcia guille.rodriguez@gmail.com