Hi @Bancroft
your main configuration is ok ( https://check-your-website.server-daten.de/?q=fastpassmanager.goering.de ):
| Domainname | Http-Status | redirect | Sec. | G |
|---|---|---|---|---|
| • http://fastpassmanager.goering.de/ | ||||
| 5.10.178.170 | 200 | 0.077 | H | |
| • https://fastpassmanager.goering.de/ | ||||
| 5.10.178.170 | 200 | 1.603 | N | |
| Certificate error: RemoteCertificateNameMismatch, RemoteCertificateChainErrors | ||||
| • http://fastpassmanager.goering.de/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de | ||||
| 5.10.178.170 | 404 | 0.103 | A | |
| Not Found |
Port 80 is open, the critical subdirectory /.well-known/acme-challenge is visible.
But (a standard IIS problem): Are files without extension allowed?
Find your webroot, create the two subdirectories /.well-known/acme-challenge, there a text file (file name 1234) without extension.
Then try to load this file via
http://fastpassmanager.goering.de/.well-known/acme-challenge/1234