Possible to get SSL for webservers public ip?

Hello, im currently learning web development and im not quiet sure i grasp how the concept of SSL works.
Im currently working on a testserver, its a Nextcloud instance running on an Ubuntu machine that i have made public trough port forwarding. I access it trough my public IP. But i really dont like opening a none-encrypted server to the internet.

Is it possible for me to add SSL to this since its connected trough IP and not a domain?

I tried using the CertBot-auto but couldnt get it to work(im new with this so could be i did something wrong).

In case i do need a domain, i actually own www.iamkaspernielsen.com
would it be possible for me to get a SSL cert for that and use it on my Nextcloud server somehow?

Any tips or feedback will be greatly appreciated!

Kind regards
Kasper

Hi @KalleDania

no, that's not possible, you need a public visible and unique domain name.

Start with the basics:

Then share your results:

Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. https://crt.sh/?q=example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.

My domain is:

I ran this command:

It produced this output:

My web server is (include version):

The operating system my web server runs on is (include version):

My hosting provider, if applicable, is:

I can login to a root shell on my machine (yes or no, or I don't know):

I'm using a control panel to manage my site (no, or provide the name and version of the control panel):

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you're using Certbot):

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Sure, if you aren't using it for anything else and it points to your Nextcloud installation. If it doesn't, perhaps you could use a different subdomain like cloud.iamkaspernielsen.com.

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