[ylk]

https://www.cloudflare.com/plans/#overview

The WAF is $20/month and as far as I know you don't get it automatically for free by using Cloudflare Tunnel, though feel free to correct me. There was the case of them enabling mitigations for the log4j vulnerabilities for anyone on Cloudflare, but that was an exception.

[janto]

Yes, WAF is one of the features you get if you're not on their free app service plan. I think having the option of simply upgrading and turning it on if it becomes necessary, makes the free offering quite attractive.

I haven't used CF in anger, so can't vouch for it more than that.