How to get user´s *real* IP-Address in Next13?

[severe gale]

I have a typical Express, React (Next13), Node, MongoDB application and need to get access to the user´s ip address on one route because he seems to be malicious.
Problem is, I couldn´t figure out how that works in Next13. The older versions seemed to have a more simple way, but all I get by using thrid party libraries like request-ip is the frontend-server´s IP-address, but not the user´s address.
I assume I somehow need to set the clients IP address in the frontend, or not?

Any help appreciated!

[flat cove]

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[barren sun]

ip address is coming from layer 3 IP layer, so you cannot manipulate it. Usually, platform such as Cloudflare, Vercel and other proxies set and forward the IP via layer 7 HTTP header to servers.

Real IP addresses would be hidden by proxies, vpn, Zscaler and so on.

[modest geyser]

I seem to get the IP of the Cloudflare DNS servers not the actual IP of the user.

I have a pricing section in my website and it shows the currency in Euros and when I checked the IP, it belongs to Clouddflare.

The headers aren't really the IP of the user but rather the DNS/CDN

You have any idea how I can tackle this problem?