php - 如何阻止客户端IP地址在Cloudflare/Docker/NGINX/LAMP站点中丢失？

Question

问题是我的以下站点结构中未设置PHP字段$_SERVER['HTTP_CLIENT_IP']，我该如何纠正呢？

Docker网桥网络上(位于cloudflare之后的主机上)的静态IP容器，名为“back”:

在容器中运行的NGINX(172.24.02)

容器中的Apache + PHP(172.24.0.3)

nginx.conf:

location / {
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header Host $http_host;
    proxy_set_header X-NginX-Proxy true;
    proxy_pass http://172.24.0.3;
}

test.php

<?php

echo('HTTP_CLIENT_IP: '.$_SERVER['HTTP_CLIENT_IP']);
echo('<br>HTTP_X_FORWARDE‌​D_FOR'.$_SERVER['HTTP_X_FORWARDE‌​D_FOR']);
echo('<br>REMOTE_ADDR'.$_SERVER['REMOTE_ADDR']);
echo('<br>HTTP_X_FORWARDED'.$_SERVER['HTTP_X_FORWARDED']);
echo('<br>HTTP_FORWARDED'.$_SERVER['HTTP_FORWARDED']);
echo('<br>HTTP_FORWARDED_FOR'.$_SERVER['HTTP_FORWARDED_FOR']);

?>

运行上面的结果:

HTTP_CLIENT_IP: 
HTTP_X_FORWARDE‌​D_FOR: 
REMOTE_ADDR: 172.24.0.2
HTTP_X_FORWARDED: 
HTTP_FORWARDED: 
HTTP_FORWARDED_FOR:

Answer 1

感谢@Devon提供打印$ _SERVER变量的建议，事实证明以下字段中包含客户端IP:

$_SERVER['HTTP_CF_CONNECTING_IP']
$_SERVER['HTTP_X_FORWARDED_FOR']

第一个给出了 client IP，第二个给出了 client IP, cloudflare IP