Hi folks. This seems like the most simple thing, and I feel like a dummy for posting. I have looked ay numerous tutorials and help requests, and can’t get this to work.
I have the A Record set up as per this image, and have tried many variations of the Page Rule, e.g.
UPDATE: the forum subdomain was connected to a Mighty Networks account. I had to get them to disable the subdomain at their end before the URL Forwarding would work in Cloudflare.
Why is that the case? I don’t know…