nslookup docker 127.0.0.1 localhost is but a name, which happens to be tied to ::1 or 127.0.0.1. I agree though that it should be outside of the default 127.0.

nslookup docker 127.0.0.1 localhost is but a name, which happens to be tied to ::1 or 127.0.0.1. I agree though that it should be outside of the default 127.0.0.1 instance, instead it can be anywhere on the 127.0.1.x network for example. Or even better use an IPv6 ULA prefix instead.