Networking can be a confusing topic, and the various considerations for security and setup depending on the type of network and whether you’re using a public or private IP address will only add to the confusion. While your home router is connected to the internet, it gets a public IP address from your ISP, so that the internet knows how to route data back to your home. This is usually a dynamic IP; that is, it changes occasionally as your ISP reconfigures its network. Businesses and those hosting servers often pay for a static IP from their ISP so that it never changes, but it’s not really necessary nowadays for most users. Furthermore, a dynamic public-facing IP address is more secure, easier to configure, and saves money.
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