Is it possible to ask your users to clear their HTTP Strict Transport Security (HSTS) for your site?

Question

If you turn on HSTS for your website with a large lifetime but later decide to turn it off (due to issues with third party software for instance) is it possible to warn users to clear their 'HSTS cache'?

Answer 1

To turn off HSTS for your server send a header of

Strict-Transport-Security: max-age=0