For example, if you typed 192.168.0.2 into the browser, your network would understand that you’re trying to access your camera and send the information there. Your local network only understands .x addresses. When accessing remotely you type in the external IP address of the router to access your camera since the internal one will never work externally. Your router has two IP addresses: an internal one which is accessible only from your home network (for example 192.168.0.1) and one which is accessible from the internet. Your camera and computer are most likely connected to a router (either wired up directly, or via a wireless connection), which is then itself connected to the internet through your Internet Service Provider (ISP). To understand NAT loopback, you need to understand how your router works. This post tries to explain why it happens and what you can do to get around it. This quirk of router configuration often causes problems for new users and can be very frustrating. You may be experiencing what’s called NAT loopback. You get home and use those very same details to access your camera and you get nothing, or worse, an error message. You’ve tested your setup when away from home and everything works well and as expected. Suppose you’ve set up an IP camera that you want to access from anywhere across the internet and have an external IP address or dynamic DNS address to use to access that camera.
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