Server receiving hit from this IP Address "::ffff:127.0.0.1". Why is that and how to resolve this?

@ok91

::ffff:127.0.0.1 is the IPv6 version of an IPv4 IP address, just to clarify.

What does your current NGINX server block look like? (the one that has the proxy configuration)

I solved it with:

set $remote_addr_ipv4 $remote_addr;
if ($remote_addr ~ ^\:\:ffff\:(.+)$) {
    set $remote_addr_ipv4 $1;
}

set $proxy_add_x_forwarded_for_ipv4 $proxy_add_x_forwarded_for;
if ($proxy_add_x_forwarded_for ~ ^\:\:ffff\:(.+)$) {
    set $proxy_add_x_forwarded_for_ipv4 $1;
}

proxy_set_header    X-Forwarded-For    $proxy_add_x_forwarded_for_ipv4;
proxy_set_header    X-Real-IP          $remote_addr_ipv4;

Regards.

I have this problem also. The only IP that shows up for me is ::ffff:127.0.0.1 with no exceptions. I pasted in your code but there is no change.

Any ideas how to solve? My nginx config is otherwise very basic, having only the absolute essentials.