If you have an IP4, and your provider is not clustering you with other users, you can use the public IP.
Search for “what is my public ip” or the same in your native language. The thing is just that you need to check your IP every day to be sure what it is.
Also depending on your router you can setup dyndns or an other service ( I mean if your router support this function), that links your IP to and domain, and you can connect the the domain users@yourdomain .
This is what I can do in my router (not Gl-iNet router)
