How to clear website cache after uninstalling ssl?

Question

Nginx

Hello, there is a site with a bunch of nginx + php-fpm, at some time I made support for ssl: the server listened to port 443, included ssl settings, etc. Now I removed all this, I listen to port 80.
With incognito browser mode, everything opens fine, but the main browser tries to redirect the site to https, and the error crashes accordingly.
As I understand it, there is some kind of certificate cache or the like. But how to reset it? And how to do it at the server level?

Answer 1

Did you use the Strict-Transport-Security header with SSL? With what max-age?
Perhaps because of it, the main browser redirects to https.
What to do with it... You can reset it in your Chrome - chrome://net-internals/#hsts
For the rest, you will probably have to wait until the max-age is over.
But I would still get any free certificate and make an https -> http redirect for the next year for search engines and users, if I already decided to refuse ssl.

Answer 2

This is not a problem on the server to do something on its side, but the browser remembers the address and protocol.
If you have Chrome, then open the developer panel (F12), after which RMB click on the page refresh button in the browser and select "Clear cache and hard reset".