CloudFlare Universal SSL

November 12, 2014

I recently activated CloudFlare’s free Universal SSL for a few of my apps (including this one), and I’m impressed. The product works exactly as advertised in that it gets you instant SSL with minimal configuration and no cert wrangling.

Although I was finally in a position where I could do a fair job managing my own SSL configuration using free certs signed by StartCom, I’d still occasionally forget to renew certs and that would result in embarassing downtime. No more!

Universal SSL combined with a Heroku app turns out to be a perfect match. CloudFlare can terminate HTTPS requests made to a custom domain and proxy them through to an app’s *.herokuapp.com address (which also responds on HTTPS), keeping both jumps fully secure. CloudFlare calls this mode “Full SSL”. “Full SSL (Strict)” doesn’t appear to be suitable because it requires that the target endpoint both support SNI and respond to requests for the custom domain.

CloudFlare SSL options

This may be one of the biggest steps taken to bring SSL to the masses in the history of the Internet. The major problem with SSL is that it just never got easier; every step from getting a certificate CA-signed to configuring it in Nginx is confusing and error prone to the extreme, and a natural barrier to widespread adoption. CloudFlare solves the problem by making the process completely opaque, which under the circumstances is the right thing to do.

CloudFlare Universal SSL was published on November 12, 2014.

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