Why do I get to nextcloud when I request a local address?

Question

Nginx

Hello. At the address cloud.domain.com, I get to nextcloud through the forwarded port.
In the Wirth host config, it listens to this domain.
Why now when I go from LAN to 192.168.0.171/phpmyadmin I get to the same nextcloud ? Who faced?

Access through an untrusted domain
Contact your administrator. If you are the administrator of this server, edit the "trusted_domains" setting in the "config/config.php" file. An example configuration can be found in the "config/config.sample.php" file.
Depending on the configuration, this button can trust the following domain:
Add "192.168.0.171" as a trusted domain

Answer 1

Default host registered? If a request comes to an IP address or a domain that is not registered with nginx, it gets either to default or (I'm not sure here) to the first of the virtual domains.
Do it simply:
server {
listen 80 default_server;
return 444;
}
And register your cloud.domain.com separately.