4 ms·

You might not have exactly one ISP. Imagine you use an RV as a nomadic home office. You have a small LAN with a private server (file server, HTTP server for te

You might not have exactly one ISP. Imagine you use an RV as a nomadic home office. You have a small LAN with a private server (file server, HTTP server for testing web sites, etc.), and you want that server to have a static IP. Since you might be on RV park WiFi at one moment, cell data at another, etc., you can't use a static IP from an ISP. But you can use the IPv6 private address range, and then you need NAT. (Technically I guess you could do without NAT if you gave every host on your LAN two addresses: a private address and a publicly-routable one. But that might be more cumbersome.)

LargoLasskhyfv 4y ago
Maybe have a look at http://he.net/ http://he.net/ and quick links on the right side...
ArchOversight 4y ago
> (Technically I guess you could do without NAT if you gave every host on your LAN two addresses: a private address and a publicly-routable one. But that might be more cumbersome.) Except that the IPv6 standard explicitly allows for two on-link prefixes for SLAAC. So in my home I have a ULA address range that is static, and all my devices get a SLAAC random IP from my ISP. If my prefix changes, that doesn't change my ULA prefix and all DNS records will continue to function. My ULA is also advertised over BGP using Wireguard, so its automatically routable from VPN when I am on the road but I still want to reach internal resources.
craftkiller 4y ago
> (Technically I guess you could do without NAT if you gave every host on your LAN two addresses: a private address and a publicly-routable one. But that might be more cumbersome.) For any IPv6 setup, you already have multiple addresses per host. You start with your mandatory link-local unicast address from the `fe80::/10` range and then you add a global address after getting a prefix from your router. I don't see how adding a third address, particularly a static one, would be cumbersome.

LargoLasskhyfv 4y ago

Maybe have a look at http://he.net/ http://he.net/ and quick links on the right side...

ArchOversight 4y ago

> (Technically I guess you could do without NAT if you gave every host on your LAN two addresses: a private address and a publicly-routable one. But that might be more cumbersome.) Except that the IPv6 standard explicitly allows for two on-link prefixes for SLAAC. So in my home I have a ULA address range that is static, and all my devices get a SLAAC random IP from my ISP. If my prefix changes, that doesn't change my ULA prefix and all DNS records will continue to function. My ULA is also advertised over BGP using Wireguard, so its automatically routable from VPN when I am on the road but I still want to reach internal resources.

craftkiller 4y ago

> (Technically I guess you could do without NAT if you gave every host on your LAN two addresses: a private address and a publicly-routable one. But that might be more cumbersome.) For any IPv6 setup, you already have multiple addresses per host. You start with your mandatory link-local unicast address from the `fe80::/10` range and then you add a global address after getting a prefix from your router. I don't see how adding a third address, particularly a static one, would be cumbersome.