Why is not visible the local server from the Internet?
The essence is this:
Your local network has the RPi to the server on port 30003. The server is available from the local network and I want it to be accessible from the Internet.
For this I set up a port forward rule on the router and use a Dynamic DNS service because I have gray ip.
When I go to the address with the DNS service without specifying the port, I see the admin panel of your router. And if you add the right port, the browser cannot establish a connection.
What could be the reason?
Several possible reasons:
1. Transfer port is incorrectly configured
2. firewall blocks connections from outside to port
3. The server's listening port 30003, accepts connections only from local area
The third option you can check with the command: sudo netstat-tulpn
Jeff28 answered on July 2nd 19 at 13:55
"For this I have configured port forwarding on the router and use a Dynamic DNS service because I have gray ip."
If you have gray IP, the Dynamic DNS will not help you. It helps if you have a non-static white IP.
Well, examples of IP addresses would be nice, because apparently you have something nedostroi, but without figures we can only guess
Jaunita.Glov answered on July 2nd 19 at 13:57
In General, the problem like as dared. The server is not responding, if we look at the dynamic dns address from the same local network. Via mobile Internet, for example, everything works.