How to change local ip to global?

Question

Nginx

For testing geo targeting, installed mod_rpaf on apache and real_ip on nginx.
In the headers, I get the local ip, which is logical. Is it possible to somehow replace it with a real one to determine the geo, thereby making sure that the script works out. And it's not even about working out. And is it possible to change hands?

Answer 1

It is necessary to register proxy_set_header X-Real-IP xxxx in the nginx config ;
or
proxy_set_header X-Forwarded-For xxxx;
Then Apache will receive the address xxxx

Answer 2

If all your testing takes place on the local network, then you can use any IP addresses you want on your hosts.
If I understand the question correctly