Allow PayPal to report payments with CloudFlare

PayPal servers should have unrestricted access to your OTS acc. maker to report payments.

Open your domain settings in CloudFlare panel and navigate to Security -> Security Rules

In Custom Rules section press Create rule.

Then setup things as on screenshot below. Expression for PayPal IPs from moment I publish this post (you can get current Paypal IP here: https://www.paypal.com/us/cshelp/article/what-are-the-internet-protocol-ip-addresses-for-paypal-server-endpoints-ts1056 ):

(ip.src in {64.4.240.0/21 64.4.248.0/22 66.211.168.0/22 91.243.72.0/23 173.0.80.0/20 185.177.52.0/22 192.160.215.0/24 198.54.216.0/23})

How to setup in CF panel: