Question

Best way to configure Load Balancer with Cloudflare

I need to integrate Cloudflare with my droplets through the Managed Load Balancer provided by DigitalOcean.

This is my current configuration:

Cloudflare

  • WAF Configured
  • Proxy Navigation Enabled (To support WAF)
  • Use of SSL provided by Cloudflare
  • IPv6 Enabled

DigitalOcean

  • Two Droplets with Apache
  • HTTP2 Enabled
  • IPv6 Enabled
  • SSL/HTTPS configured with my own security certificate from my domain
  • Cloud Firewall rules that only allow access on port 80 and 443 by the DO balancer

How should I configure the DigitalOcean load balancer to support this integration, and keep the original IP of the client coming from Cloudflare?

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Hi there,

The setup looks very good. The DigitalOcean Load Balancers will set some HTTP headers that pass the source IP through to your backend servers, like Cloudflare does with X-Forwarded-For, and CF-Connecting-IP headers.

From the Protocol Support section of the docs:

The load balancer sets the X-Forwarded-For, X-Forwarded-Proto, and X-Forwarded-Port headers to give the backend servers information about the original request.

Hope that this helps! Regards, Bobby