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ddclient
Discontinued This is the new home for ddclient. Ddclient is a Perl client used to update dynamic DNS entries for accounts on 'Dynamic DNS Network Services' free DNS service. It currently supports a lot of different routers and a few different services.
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WorkOS
The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.
You can take a look at : https://github.com/joshuaavalon/docker-cloudflare. Setup your Domain with Cloudflare, and you will be able to use this Docker image to auto update your IP. https://developers.cloudflare.com/fundamentals/get-started/setup/add-site/
You would create one A record and use something like ddclient to update the IP address whenever it changes. Then create as many CNAME records (these are like an alias) as you want and point them to the A record.