"white IP address" is an address that your internet provider gives you and which is accessible from the whole internet, not just some address local for the provider's network and hidden behind NAT. Since IPv4 addresses are scarce, most providers don't allocate them directly to their customers.

An unique IPv6 may be theoretically assigned to each end device and thus solve the accessibility problem for locally-hosted servers, but I doubt internet providers do this in practice and I am afraid that many providers don't support IPv6 at all.