Scan.nextcloud.com does not resolve my Nextcloud instance

[scubamuc]

@Unwissender no need for dupes, but thanks for mentioning;

Security Scan says "Host not found"

When trying to run a security scan, the scanner says “Host not found”. It used to work in the past (> 6 months ago). I now upgraded to 31.0.6 and it doesn’t work anymore. Everything else is working fine. I can access my nextcloud from the internet from both, mobile and pc clients as well as webdav. To access it, I use an address like cloud.mydomain.ch. My server is behind a firewall that only lets Ports 22, 80 and 443 through. And only TCP protocol. Also only IPv4. DNS entries haven’t changed i…