Pull the weeds out of your Cloudflare setup.
Putting a self-managed WordPress server behind Cloudflare: origin lockdown, DNS, caching, the WAF, Tunnels and the errors you hit along the way. Every guide shows the date we tested it.
Chrome shows this when your DNS works but gave no address for this one name. Open the same address on mobile data. If it fails there too, the problem ...
Add a set_real_ip_from line for each of Cloudflare's IP ranges (22 on 23 October 2026) plus real_ip_header CF-Connecting-IP, and nginx and WordPress s...
Use ufw to allow ports 80 and 443 only from Cloudflare's published IP ranges (22 of them on 23 October 2026), keep SSH open for yourself, and deny eve...
Chrome's HTTP/3 runs on QUIC, which uses UDP, and ERR_QUIC_PROTOCOL_ERROR means something on the way blocked, cut off or damaged those packets. On a s...