11000 The login is blocked since Nextcloud is running.Please use the automatic login from your Nextcloud

(edit, this is an old screenshot, the port is also now 11000)

I changed this from scheme https, to http.

and now I get the chrome "this site cant be reached. with both the Domain, and the http://IP-of-NC-AIO:11000

Can you use the private ip-address of your server instead of the ip-address of the container in npm as target? http and 11000 is indeed correct

The unraid server?

I have a little desktop that runs OPNsense.

I have a physical desktop, that runs unraid as the bare metal OS.

On unraid, I have a few dockers, like PiHole, NPM, and NC-AIO.

unriad itself gets a private IP address, and then each container their own private IP address from the router.

so you could assume its like:
opnsense 192.168.1.1
unraid 192.168.1.2
pihole 192.168.1.3
NPM 192.168.1.4
NC-AIO 192.168.1.5
NC-apache-container 192.168.1.6

Yes

and then going to the Domain, I get the 502 bad gateway - openresty:
image

What ports need to be forwarded in the router? and from what IP?

such as forward:

192.168.1.5:443
192.168.1.6:11000

^example, I dont know what ports for what services need to be opened.