Ensure only one of our HTP pool has hosts handled by Cloudflare
… as suggested by hefee on #12023. Otherwise, our multi-pool design for htpdate is a bit moot.
What metric can we use to identify a site that fronted by Cloudflare?
curl -I zerobin.net [...] Server: cloudflare [...]
Server, Alt-svc header. IP-Address ranges (https://www.cloudflare.com/ips/).
If we check for Cloudflare, we may also what to make sure that no other big Cloud services control more than one pool.
AWS (Amazon Web Service):