I'm using PayPal to take payments on my website.
30% of IPNs bail out with the following cURL error. It works fine the other 70% of the time.
Unknown SSL protocol error in connection to www.paypal.com:443
I've tried using SSLv3 to no avail.
Here are my PHP cURL settings, based on Micah Carrick's IPN listener script.
<?php
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
curl_setopt($ch, CURLOPT_CAINFO, dirname(__FILE__)."/cert/api_cert_chain.crt");
curl_setopt($ch, CURLOPT_URL, 'https://www.paypal.com/cgi-bin/webscr/' );
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $encoded_data);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false);
curl_setopt($ch, CURLOPT_TIMEOUT, 45);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HEADER, true);
