By now, you are probably familiarized with Domain Name System (DNS) and how it works. It is the service that connects or maps the numeric aspects of sites you visit, or the IP addresses, to the domain names of those pages.
However, with the boom of dynamic IP addresses, another need developed. The DNS service is only good for static IP addresses because the user identity doesn’t change every time its device connects to the web. However, the Dynamic Domain Name System, or DDNS, is perfect for supporting dynamic or changing IP numbers.
DDNS is, therefore, a useful tool to have if the user wants to access his or her home computer from a remote place, or host a web or FTP server advertise a public name to prospective users, among other things. Since home networks usually get dynamic IP addresses from their Internet Service Providers (ISPs,) DDNS is especially handy if you run that kind of setting.
这项服务如何运作？
就像大多数远程访问工具一样，你需要注册动态 DNS 或 DDNS 提供商，并在主机上安装其软件，才能有效地使用这项技术。我们所说的主机，是指任何扮演 "服务器 "角色的设备。
Since DDNS are in charge of “adjusting” whenever IP address changes, that is precisely what the installed software will do. And it will change since it is a dynamic IP number: when that happens, the software you installed will make sure to get in touch with the DDNS service in order to update your account with the newly-changed IP.
这项技术，或者在这种特定情况下，您的账户关联 DDNS 名称，可以有效地将访问者分配到作为主机的服务器上。IP 可能会改变上千次，而这一过程也会不断重复。您的 DDNS 软件总能识别动态 IP 是否发生了变化。
顾名思义，如果有关网络的 IP 地址是静态的，就不需要 DDNS 服务，因为域名只需要知道一次 IP 号码。请记住，如果 IP 是静态的，就意味着它是稳定的，不会被修改。
为什么需要 DDNS 服务？
为什么需要 DDNS 服务？对于那些想在家中托管自己的网页的人来说，需要 DDNS 服务提供商。此外，如果你身处远离 "主机 "服务器或计算机的远程位置，并希望访问文件或文档，也可以使用这项服务。
After all, business IP addresses are more convenient than home IPs because your ISPs offer you a number to access the web from your house, but since they are usually dynamic, they tend to change because ISPs run their own online systems. That scenario affects those who want to use their residential IPs with their security cameras, webcams, and other smart devices because the number is modified and there are no heads up.
这就是 DDNS 存在的原因：为动态家庭 IP 地址分配一个域名，以便在修改 IP 号码时自动更新。
免费和付费 DDNS 服务
与大多数技术工具和在线资源一样，DDNS 可以免费提供，也可以通过付费的定制服务提供商提供。就像生活中的任何事情一样，你最好选择后者，因为它比前者更可靠，功能也更多。
例如，免费 DDNS 服务不允许您选择任何 URL 并将其转发到主机服务器。一旦你选择了主机名，你就只能选择少数几个域名。
以下是一些值得考虑的 DDNS 服务选项：
- FreeDNS 恐惧
- NoIP
- Dynu
- 谷歌域名
- DNS 动态
- 鸭子 DNS
- 组织
DNS 及其危险
DNS 及其危险Just as DNS carries some security and privacy risks, DDNS services aren’t without hazards, especially if you run a VPN. Virtual Private Networks, or VPNs, are online safety tools that provide anonymous browsing to customers because they hide the user’s IP address and shared online content, rerouting them to remote servers.
VPNs are handy privacy and security apps, but you need to use a reliable provider, like IPBurger. Remember that, if you run a VPN, its DNS server will manage your internet requests. But if there are leaks because of unreliability or poor encryption, the internet request will end up being serviced by your ISP, which will be a privacy threat.
IPBurger is more than prepared to fiercely protect users from DNS leaks, DDoS attacks, and cache poisoning because it implements military-grade encryption and has a strict no logging policy. Its plans range between $5 and $9.58 per month, and you will be satisfied with its host of shared and dedicated IP addresses.
总之，动态域名系统（DDNS）可以帮助你跟上网络中不断变化的（动态）IP 地址。它们是远程访问和运行家庭网络等的完美服务。
