Nginx is running in a container
I don’t think it is. On my other machine it’s running in the docker container, but not this one.
Using serverIP:5870 has the same result as using listmonk.mysite.com:5870. It loads a broken page https://i.stack.imgur.com/gIy4A.jpg with broken links. IE: the URLs are http://localhost:9000/subscription/form
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It was a firewall issue. I disabled my firewall and it works.