The cool thing is that there are free dynamic DNS services that you can use to set all of this up.

酷的事情是，有免费的动态DNS服务，您可以使用设置这一切。

youdao

We are a full solution Dynamic DNS provider and believe in providing a free service to the community benefits most people.

我们是完全的解决电动dns提供者而且相信提供对社区的一个免费的服务对大多数的人有益。

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