Dynamic DNS，Acronym ddns，It is different from our usual DNS resolution，But it is intended to deal with the kind of no fixed public IP address resolution server。
Typical usage is：Construction of small home broadband server，There is no fixed IP，Want online，In addition to writing scripts mail outside，The only way this can go ddns。
as far as I can tell，The most famous is probably the notoriously unstable and difficult to use peanut shells[……]