Ever since I updated our Woocommerce platform to 2.6 PayPal IPN fails claiming that the cURL is using an Unsupported SSL protocol version. Server's SSL has been updated but the one PHP uses in this Centos 6 / WHM / Cpanel configuration remains OpenSSL/1.0.0 accordign to phpinfo(). Need immediate fix.
PHP is bundled with a version of OpenSSL, so it is independent from your server version. It's just a case of running a few terminal commands to update cURL, OpenSSL and then recompile PHP.