When configuring servers, IP restrictions are imposed on management functions.
So, I'd like to know the IP from which the IPN is connected, is it on somewhere?
"This way.
production environment
Select https://ppmts.custhelp.com/app/answers/detail/a_id/92/:
notify.paypal.com
ipnpb.paypal.com
Sandbox
Below is https://ppmts.custhelp.com/app/answers/detail/a_id/250/.
ipn.sandbox.paypal.com:173.0.82.126
ipnpb.sandbox.paypal.com:173.0.82.66"
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