![]() (2) Publicly addressing multiple devices in a household. There are literally trillions of IPv6 addresses available per person. The cost of IPv4 addresses is high because of scarcity and small users can’t really hope to have more than one or two if they are lucky and can pay. As IPv4 addresses have run out, only organisations that bought large numbers ages ago have these. You can’t port forward different domains to different IP addresses using IPv4 and NAT unless you have multiple public IPv4 addresses and thus multiple network interfaces. These could even be different servers on the same machine: useful, for example, if you run a web server and a proxy server on the same ports, or maybe a PHP and a Java server platform – but you need more than one address, which is where IPv6 comes in. (1) Running multiple servers at different domains on the same subnet on ports 80 and 443. My use cases come largely from running servers and experimenting with devices at home. This is intended to be an ongoing list of use cases that come up rather than a proper post, so I won’t date updates to it. ![]()
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