We use the paypal_r module. Via an apache rewrite rule, I want to force use of amember under https. This will re-write any incoming requests from http -> https. I am afraid this rewrite rule may damage PayPal IPN notifications. I want to know if the PayPal IPN URL sent to PayPal for each transaction uses http or https. If it currently uses http, how can I modify the code so that it uses https ?
It use aMember CP -> Setup -> Global Root URL so skippybosco was right, set Root URL to https as well.