The tutorial (Redirecting One Domain to Another)[Redirecting One Domain to Another] explains a workaround to redirect one domain to another by creating an A record to an internal IP (
192.168.0.2) and using Page Rules to redirect (so the IP is never used).
That doesn’t work anymore, as CloudFlare doesn’t allow proxying internal IPs, only DNS. This means that the Page Rule is never executed. The solution is simple: use an external IP. I used Google’s. As the Page Rule will redirect the user before it hits that IP, it doesn’t matter what you use.
Other than that, the workaround works well.