Hello, I seem to have understood your explanations, but after I have changed Caddyfile and curl command accordingly to use only http, it still redirected to https.
I changed the site url in Caddyfile to
:80
respond "Hello World!"
I then caddy adapt --config /etc/caddy/Caddyfile
Now if I do curl -vL http://localhost, I still get no respond but error messages:
* Trying 127.0.0.1:80...
* TCP_NODELAY set
* Connected to localhost (127.0.0.1) port 80 (#0)
> GET / HTTP/1.1
> Host: localhost
> User-Agent: curl/7.66.0
> Accept: */*
>
* Mark bundle as not supporting multiuse
< HTTP/1.1 308 Permanent Redirect
< Connection: close
< Location: https://localhost/
< Server: Caddy
< Date: Wed, 05 Aug 2020 10:47:52 GMT
< Content-Length: 0
<
* Closing connection 0
* Issue another request to this URL: 'https://localhost/'
* Trying 127.0.0.1:443...
* TCP_NODELAY set
* Connected to localhost (127.0.0.1) port 443 (#1)
* ALPN, offering h2
* ALPN, offering http/1.1
* TLSv1.3 (OUT), TLS handshake, Client hello (1):
* TLSv1.3 (IN), TLS handshake, Server hello (2):
* TLSv1.3 (IN), TLS handshake, Encrypted Extensions (8):
* TLSv1.3 (IN), TLS handshake, Certificate (11):
* TLSv1.3 (OUT), TLS alert, unknown CA (560):
* SSL certificate problem: unable to get local issuer certificate
* Closing connection 1
curl: (60) SSL certificate problem: unable to get local issuer certificate
More details here: https://curl.haxx.se/docs/sslcerts.html
curl failed to verify the legitimacy of the server and therefore could not
establish a secure connection to it. To learn more about this situation and
how to fix it, please visit the web page mentioned above.
Finally, what’s wrong with the SSL certificate? Can it be solved as well if I do want to use https?