[ccollins]

"Client IP address is forwarded to application as X-Forwarded-For" is the biggest news here.

Previously, it cost $100 per month to have access to the Client IP over SSL, so any sort of geo-location was out of the question.

Insane prices for arbitrary things are why I left Heroku a few months ago and decided to custom build my servers on Linode.

[gemlogger]

Isn't this just Heroku copying what cloudflare already has on offer?

[bgentry]

This is a standard HTTP Proxy header: https://en.wikipedia.org/wiki/X-Forwarded-For

[revelation]

In fact, the "X" indicates it is not a standard header. But yes, very common for proxies to pass on.