Issue with Cloudflare Full / Full (strict) and Google Cloud External Load Balancer SSL Handshake 525


I’ve tried setting up a Google Cloud External Load Balancer into my website and I used the Google Cloud Managed SSL certificate.

When I was done setting that up (including pointing CF to the LB and turning on full), I encountered the SSL handshake error (also tried it in strict mode)

This error does not appear if I’m not proxying the traffic through CF. My intention initially was to implement Full or Full (strict) and setting up the Google Cloud Armor to only accept CF IPs. But I can’t get past the first hurdle. There’s no documentation on this as well.

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