try with proxy-address-forwarding="true"
Hi Tomaz, thanks for your reply.
I've just solved the problem simply updating my Wildfly to 8.1.0 CR2 (CR1 also fixed the problem). Sorry for bothering.
I think proxy-address-forwarding would be useful in case I were using a http proxy, but in my case I'm just using a simple iptables nat (-A PREROUTING -i eth0 -p tcp -m tcp --dport 80 -j REDIRECT --to-ports 8080) due to the limitation that only the root user can bind services on ports bellow 1024 on linux.
Ah, tough you already ware on 8.1...