Okay, what's your infrastructure? Do you have a VPS, a dedicated one and is it your own or did you hire it from a company like AWS, Google Cloud, Vultr etc.
If it is a Dedicated device that you have in your company or home, you must open the ports on your rooter.
If it's from a company like AWS, you'll have to open these doors with them.
Your problem is because your doors are closed somewhere.
Deveria retornar algo como: