Some providers, like Cable-based ISPs, change the IPs pretty frequently. Well, your choices are to go in and update your DNS record manually, use one of the free (typically restricted to their domain) or premium Dynamic DNS (DDNS) providers, or set up a simple bash script to detect the change and make the update in your own registered domain.

How does Synology DDNS work? : synology DDNS is just a DNS service outside of a dynamically assigned network. A client runs on the NAS to determine its external IP address and that address is reported to the service (Synology in this case). You setup a host name (FQDN) associated to your account and the service takes care of translating the FQDN to the IP address. Configuring Synology NAS to use own domain name Nov 22, 2018 Map your synology address with your own domain and dynamic

sorry for me not being more clear on the question, but thanks for the fast response. in ddns updater (3rd party synology package) ive this to configure:

DDNS (Dynamic Domain Name Service) simplifies connecting to your Synology NAS over the Internet by mapping a hostname to its IP address. As a DDNS provider, Synology offers a variety of host addresses (such as *.synology.me, *.DiskStation.me, *.myDS.me, etc.) free to registered users with a Synology Account to apply to their NAS devices. Jul 17, 2017 · Synology offers a very user friendly Network Attached Storage (NAS) device experience, but that doesn’t mean unboxing it and starting it up is exactly a one-click affair. Let’s get things up and running so we can move onto all the fun projects a compact NAS with server-like functionality can facilitate. Sep 30, 2016 · In any case, try changing the Synology “admin” account password. Modify DNS settings. I do not use the Synology’s DNS settings, so this was not an issue for me. However, another reader is using Synology’s RT1900ac router, and offered the following advice:For the DHCP server, “forward known DNS server” was disabled.

Free Dynamic DNS. Get public hostnames for your dynamic IPv4 and IPv6 addresses within seconds.

Tutorial: setup a DDNS in DSM - Tutorials and Guides Nov 28, 2017 GitHub - dvershinin/cloudflareddns: DDNS with Cloudflare It's worth noting that if your Synology DSM is recent enough, you can simply use Synology's own DDNS service, then create a CNAME record at your domain that points to it. The downside to this solution, however, is extra DNS lookup required to resolve domain to IP. Alternative solution is to use cloudflaredns which ships with the necessary CLI What is a DDNS (dynamic DNS)? - IONOS 'Dynamic DNS' (DynDNS) stands for Dynamic Domain Name System (also known as 'DDNS'). This helps you to forward your home network’s constantly changing IP addresses to a fixed domain name.You have to register with a DDNS service under an available name (such as example.example.com).Your computer is always available under this address, even if you don’t know its current IP address. DiskStation Manager 7.0 - Synology