But I have a domain name now and I want to make that domain
redirect to my site. Normally I just put the website adress there.
That is http://www.elunatic.hulpopafstand.com
But now I am asked to put the IP from my website there. Or
the Dns.. I don't know how to find that.
your website? Do you own that domain name or did someone set that up for you?
What's your domain name?
That site is hosted on a DirectAdmin server. Are you the server administrator of that server?
If so, then you can either set up a new domain for your website and re-upload your site, or you can create an alias for your website at the elunatic.hulpopafstand.com site.
If not, then are you the account owner of the site elunatic.hulpopafstand.com? If so you can log in to your account and create a domain alias.
The DA server will automatically create the DNS records but you'll have to add the proper DNS servers to your domain name at the registrar where you purchased the domain name.
If it's your server you need to use the nameservers your server uses; if it's not you have to use the nameservers your hosting company tells you to use.
Otherwise you'll have to explain in greater detail.
