You pass all traffic through Cloudflare. You do not pass any traffic to Crowdsec, you detect locally and only report blocked IPs. And with Modsecurity CRS you d

You pass all traffic through Cloudflare. You do not pass any traffic to Crowdsec, you detect locally and only report blocked IPs. And with Modsecurity CRS you don't report anything to anyone but configuring and fine tuning is a bit harder.