Cloudflare IP addresses
Allow Cloudflare IP addresses
Because of , all traffic to pass through Cloudflare before reaching your origin server. This means that your origin server will stop receiving traffic from individual visitor IP addresses and instead receive traffic from , which are shared by all proxied hostnames.
This setup can cause issues if your origin server blocks or rate limits connections from Cloudflare IP addresses. Because all visitor traffic will appear to come from Cloudflare IP addresses, blocking these IPs — even accidentally — will prevent visitor traffic from reaching your application.
For customers, Cloudflare routes the traffic instead of proxying it. Once Cloudflare starts advertising your IP prefixes, it will accept IP packets destined for your network, process them, and then output these packets to your origin infrastructure.
Customize Cloudflare IP addresses
If they do not want to use Cloudflare IP addresses — which are shared by all proxied hostnames — Enterprise customers have two potential alternatives:
- : Cloudflare announces your IPs in all our locations.
- Static IP addresses: Cloudflare sets static IP addresses for your domain. For more details, contact your account team.