[Pound Mailing List] About pound + x-forwarded-for + nginx

Hello guys,

I've searched about it on internet and also in the mail list, I found tons
of replies about it, but none of them fit to my needings.
I've got a pound as a balancer, sending the requests to my nginx running
ModSecurity + CRS.
ModSec receives the requests from pound with the pound node IP, not the
remote (client) IP, and i've tried lots of configurations using
x-forwarded-for with no sucess.
I've found some people saying about mod_rpaf, but it seems to be an Apache
module, but didnt found anything about nginx.
Is it possible to get those informations using nginx instead of apache?
Do I have to configure anything different in the pound.cfg or it comes by
default?

Regards,

Stephan Gomes Higuti