I have a teamspeak server set up on Ubuntu 16.04, and I need to open port 30033 to transfer and upload files.
I can't find a direct answer on how to do this. How can I open port 30033?
Usually opening a port refers to unblocking the port in the firewall. Ubuntu blocks nothing by default.
Applications (like Teamspeak) bind to ports that they use. Some mistake that activity for the application opening the port.
If you have not changed your firewall, and and if no application is already using port 30033, then your mission is already accomplished.