Access your Raspberry Pi over the internet
You can connect to your Raspberry Pi over the internet from another computer or a mobile device. There are a number of ways to do this, which we cover below.
One method is to set up port forwarding on your router. To do this, you must change the configuration of your router to forward all inbound traffic from the internet on a specific port to the local IP address of your Raspberry Pi. Most routers have this feature available. However, every router is different so you will need to consult your router's user manual for instructions. The settings can be tricky if your Pi is behind a firewall or if there is more than one router. One disadvantage of port forwarding is that it exposes a network port on your private LAN to the public internet. This is a known security vulnerability and must be managed carefully.
Rather than using port forwarding, there are a number of alternative online services available. These provide varying levels of functionality - see their websites for more details.