> good job all the networks cables are glued in and no one ever plugged a cable into the wrong port, or doing so might result in all the devices behind that fir

> good job all the networks cables are glued in and no one ever plugged a cable into the wrong port, or doing so might result in all the devices behind that firewall getting exposed directly to the internet and no one noticing because everything still works. So just put your database server on an IPv6 ULA (which is not globally routable)? There are other benefits to that, too, you know? Like that you can have a completely static address for the server, which is agnostic to whatever IPv6 prefix gets assigned by your upstream provider.