How to get the user's IP if the server is behind a router?

Question

Nginx

Given:
- Router on dd-wrt with full access.
- Server with nginx behind a router.
Forwarded the webserver port. I look at the nginx logs - $remote_addr is written there, and this parameter is equal to the IP of the router.
Is there any way to find out the real IP of the caller?

Answer 1

In my opinion, the comrade who unsubscribed above did not understand the essence.
the port is forwarded on the router with dd-wrt (iptables), that is, your web server will not receive a real address in any way, be it at least Apache, at least Engenks, at least something else.
So don't bother.
In your case, the output is this - only if possible, put a proxy on dd-wrt redirecting to your internal web server. But this is if your router allows.

Answer 2

If it's nginx+apache2, is mod_rpaf enabled?
Debian, enable mod_rpaf:
# a2enmod rpaf
If not installed, install:
# aptitude install libapache2-mod-rpaf
Then /etc/apache2/httpd.confadd: Restart Apache2: or
RPAFenable On
RPAFsethostname Off
RPAFproxy_ips 127.0.0.1 тут_пишем_свой_ip
# /etc/init.d/apache2 restart
# apache2ctl restart