How to define remote_addr in virtual box behind NAT?

Question

PHP

There is a computer win7 in which virtualbox (debian nginx php) is installed in order to develop php scripts.
NAT is selected in the network settings and port 80 is forwarded.
PHP $_SERVER['REMOTE_ADDR'] all the time '10.0.2.2'
how to get the real REMOTE_ADDR of the client?

Answer 1

from the command line, execute
VBoxManage modifyvm "virtual_machine_name" --nataliasmode1 proxyonly
command line must be run not from the admin, but from under your user. the virtual machine must be stopped.

Answer 2

mod_rpaf
ngx_http_realip_module