Seems to be quite stable and well-documented: https://www.cloudflare.com/ips/ https://www.cloudflare.com/ips/ Edit: but yes, the tunnel ‘thing’ is exactly that

Seems to be quite stable and well-documented: https://www.cloudflare.com/ips/ https://www.cloudflare.com/ips/ Edit: but yes, the tunnel ‘thing’ is exactly that! So would be even better.