Hi
I’m new with this, so I need urgent help to get started.
I have set up an Ubuntu 20.04 server on a ThinkPad with static IP in my network
Installed Virtualmin.
Created a new server with a subdomain from Ionos. (subdomain.mydomain.com)
I’m behind a Fritzbox 7590 with changing IP from provider A1.
What steps are required to connect the “subdomain.mydomain.com” from Ionos to the server created with Virtualmin in the network on Thinkpad.
To get web services to work with your domain (and to keep instructions as simple as possible at this juncture) you need to set the IP address of the domain to the (dynamic) IP address provided by A1
I know Fritzbox offers Dynamic DNS resolution / DynDNS. You could configure your system to rely on Fritzbox and keep Virtualmin out of the business of dynamic IP updates entirely - and that would work with a bit of configuration. However, Virtualmin can act as a DDNS client via Virtualmin -> Address and Networking -> Dynamic IP Updates. If you use this (in conjunction with Fritzbox DDNS or independently of it), you are likely to simplify configuration of the services that you run on Virtualmin and get logs of your IP changes within the Virtualmin ecosystem.
Virtualmin DDNS supports DynDNS and custom scripts. The latter would let you do interesting things if you have services running under Fritzbox. See https://www.virtualmin.com/node/57320
Disclaimer: my info may be dated, it has been some years since I have had to use dynamic IPs on servers.