Quote from: Robin@Symbiostock on September 13, 2015, 21:56
It's all a bit cryptic in the way they explain it, but it's relatively simple:
When you receive an IPN, the software (in the case of Symbiostock, WooCommerce) confirms the IPN with PayPal via a secured URL. All PayPal is saying is that the security of this request is now being changed from 128 to 256.
You don't have to change your IPN url, or put that in SSL. All that is required is that the server that is going to contact PayPal to confirm the IPN knows how to communicate via the 256 standard. Most servers will be okay with this.
An easy way to test is to download and install this plugin:
https://gist.github.com/mikejolley/0941e0882efcad64ea40
It will tell you whether your server can negotiate it or not. I've tested it on a number of servers and they have all been successful.



