What does dynamic dns mean?

ByFarly Powell 2020-01-08 397

Dynamic DNS referred to as DDNS, refers to the system that corresponds the domain name to the changed IP address. Usually, a domain name corresponds to a fixed IP address, but in some cases, the IP address of the server may change at any time, such as using ADSL to dial up the Internet, the IP address obtained is different each time. Conventional DNS parsing can not meet the needs of use, but the dynamic DNS system can solve this problem very well, and can automatically correspond to the IP address and domain name after the server is changed.

For example, if a user registers a domain name, suppose it is 123.com, the user wants to use the domain name 123.com to make a website, so he needs to set up a WEB server, but the user accesses the Internet through ADSL, and the IP address is not fixed, so the domain name 123.com cannot be resolved to a fixed IP address, and the construction of the 123.com website cannot be completed.


After using dynamic DNS, this problem can be easily solved. Every time a user dials a IP address through ADSL, the dynamic DNS service will automatically correspond the acquired IP address to the domain name 123.com, so that it can be accessed through the Internet. For example, if the IP address obtained after the first ADSL dial is 1.1.1.1, the dynamic DNS will automatically resolve the 123.com domain name to 1.1.1. On this IP address; the IP address obtained by dialing again after disconnection is 2.2.2.2, and the dynamic DNS service will resolve the 123.com domain name to 2.2.2.2 as soon as possible.


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