Regarding the following text:
Firewall and proxy warning!
If you are running a reverse proxy which is mis-configured Discourse may think all the requests are coming from a single IP address, it is very likely you will hit rate limits early. Be sure to configure your reverse proxy to forward the IP correctly.
In our setup we tunnel all API calls through a proxy. This proxy handles authentication and a lot of other stuff before sometimes querying Discourse.
What is the recommended way (specific header?) to forward the IP adress of the original requester?