It's not a problem if those connections use self-signed certificates, right? If that's the case, then setting up SSL from CloudFlare to your servers should be pretty easy.
It would be free, but not necessarily easy, as it would still entail configuring your web server to use SSL, and that might not even be an option if you're using shared hosting.
(Aside: self signed certs don't protect the connection from active attacks unless CloudFlare pins the cert. I'm mainly concerned with passive eavesdropping though.)
Could you elaborate on this. My impression was that connections between data centres (e.g. in the case of using an EC2 instance with Cloudflare) were already very secure and therefore do not require SSL.
Agree with others that it depends on what you are trying to protect against. It's also worth reading through the options that Cloudflare supports for origin server communication:
igul222|11 years ago
agwa|11 years ago
(Aside: self signed certs don't protect the connection from active attacks unless CloudFlare pins the cert. I'm mainly concerned with passive eavesdropping though.)
guyht|11 years ago
eli|11 years ago
mmohebbi|11 years ago
http://blog.cloudflare.com/introducing-strict-ssl-protecting...
ihsw|11 years ago
simpleigh|11 years ago