I've set up a server running 12.04 server edition which is connected to internet via LTE modem and shared to the internet as a WiFi hotspot. I've also installed no-ip on a server and gave it a host.
So when I try to SSH to server using its local IP (10.10.0.1), everything is OK. But when I try to use its host (oldrustyjack.no-ip.info), I cannot connect. But server responds to ping.
Sorry for bad English.