Magento – Magento – Paypal Express Checkout’s return url

As explained in here also Magento's multishipping checkout does not support payment methods that required a redirect to a payment gateway.
The reason for that is beyond my understanding.
And making the multishipping support payment gateways is not an easy task.
If I would want to implement this I would start by looking at how the onepage checkout handles redirects to payment gateways and how it handles the feedback from them.

As I understand it (and please correct me if I'm wrong) that it is in fact your hosting company (if on a shared platform) or you yourself if on VPS or Dedicated server for example that would have to disable the SSLv3. Your web host should do this, if they haven't already, and if you are responsible for your own server then I believe you can modify your httpd.conf and add the following;

SSLProtocol ALL -SSLv2 -SSLv3

This will disable v2 and v3 and I believe that TLS is the standard fallback connection.

This is if Apache config so if you are using something else, then the code may change slightly, but hopefully this helps you a little but I would be grateful to hear other peoples input on this too.