Script that automatically generates Cloudfare real-ips configuration for NGINX, you need to add `include /etc/nginx/cloudflare;` to the `http` block in `/etc/nginx/nginx.conf` file to activate.

cloudfare-nginx.sh

#!/bin/bash

set -eu

CLOUDFLARE_FILE_PATH=/etc/nginx/cloudflare

echo "# Cloudflare" > $CLOUDFLARE_FILE_PATH;

echo "" >> $CLOUDFLARE_FILE_PATH;

echo "# - IPv4" >> $CLOUDFLARE_FILE_PATH;

for i in `curl -s -L https://www.cloudflare.com/ips-v4`; do
    echo "set_real_ip_from $i;" >> $CLOUDFLARE_FILE_PATH;
done

echo "" >> $CLOUDFLARE_FILE_PATH;

echo "# - IPv6" >> $CLOUDFLARE_FILE_PATH;

for i in `curl -s -L https://www.cloudflare.com/ips-v6`; do
    echo "set_real_ip_from $i;" >> $CLOUDFLARE_FILE_PATH;
done

echo "" >> $CLOUDFLARE_FILE_PATH;

echo "real_ip_header CF-Connecting-IP;" >> $CLOUDFLARE_FILE_PATH;

nginx -t && systemctl reload nginx