Ok, I used http://publicIP/user
for the IPN setting, the IPN simulator said it's OK, I can reach the usermanager from Internet using the same public IP, I get
"OK to complete the transaction
Payment Status: Completed
What should I do now?
Contact the buyer to confirm the purchase
Save all correspondence with the buyer " in sandbox PayPal history...
And ... my router crashed... the last thing the log says is:
FAIL: paypal resp != "VERIFIED" (INVALID)
WARNING: Potentially malicious payment received!
And of course the user stays with inactivated account and timeout payment after some time.
What am I missing?!