Our payment service provider sends callbacks to WooCommerce from IP range 213.207
On this ways I added the whitelist for this range: http://prntscr.com/qo3o92
The callback still is failed and our payment provider gets a 503 after proxy response.
Even if we only use Cloudflare DNS by turning the clouds grey.
But when we use our own nameservers everything works fine.
Is this the right way for whitelisting?
How can’t it work even if we only use Cloudflare for DNS?
Hope we can fix it with your anwsers.