Specifically, you’ll need to instruct your router to forward requests for port 80 (HTTP) to the Pi on your LAN. So what do you need to do to connect your Raspberry Pi to the rest of the world? Well, you’ll need to forward exterior requests for webpages (what your web browser is looking for) to your Pi. Its also used to make sure that your internal network doesn’t request individual IP’s on the WAN (Which is why all of your home devices typically take the IP address of (192.168.0.XXX) but you only have one WAN IP. Your router serves as the gatekeeper that connects your LAN to the WAN, but also makes sure that your LAN isn’t accessible to everyone on the web for your security and privacy. That is, Your OctoPrint is only accessible on your local area network (LAN), but not accessible to the world-wide web (WAN – Wide Area Network). The reason is simple – your Raspberry Pi and OctoPrint server, while completely accessible at home, is not exposed to the wider web. You’re able to connect to it at home using a web browser and navigating to the simple IP address: 192.168.0.XXX but, when you try to connect to that on the go, you get a 404, address not found error. We’re still staying home far more than the norm, but for those who are still out and about and wanting to check your print to make sure its on-task or to see if you even started the print, a common question is “how do I connect when I’m not on my home internet?” You may want to check other options for accessing OctoPrint from the internet. Please avoid it unless you know what risks you are taking by setting up port-forwarding. Important note: Port-forwarding may be a potential security risk for your home network. This guide will walk you through the process step-by-step to show you how to set it up. Port-forwarding is a technique that gives you access to your OctoPrint from anywhere on the internet, not just when you are on your home network.
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