Issues with Network

I use Centos 8 and Rancher 1.6.30.

I have a strange issue. I can access the Web Gui of Rancher and do everything in the GUI, but when I create a stack with containers I am not able to access them on the public interface of the server. I can access the service on the server using the public IP or localhost but not from an external network?

I checked the ports on the firewall and the mapped ports are open.

Any ideas what could go wrong?

Thank you.