Can I configure the Cloudflare IPv4 proxy to use a specific IP address?

Yes, you can configure Cloudflare to use a specific IP address for your IPv4 proxy. You would typically do this via the Cloudflare dashboard, specifying the desired IP address as the proxy IP. This allows you to use an existing Cloudflare IP address or even define one if needed (though this is less common). It's important to ensure the IP address is properly configured and accessible.