I am toying around with my Raspberry Pi. Today I set up a container running Etherpad Lite and I would like to make it accessible through the internet. Accessing it via local/internal IP address on its port on our home network works.
Also on this Raspberry Pi I have a running Apache which serves at port 80 and can be access via domain name using dynamic DNS (Two-DNS).
Using the internal IP address, I can access both by specifying the correct port. But using the domain name, I can only reach Apache at port 80. Shouldn't I be able to connect to the other port as well? Is this a problem with docker? Or is there something I overlooked with DynDNS?