create nginx config realip for Cloudflare

create cloudflare nginx conf realip.md

create nginx config realip for Cloudflare

nginx_conf_cloudflare_real_ip.sh

CF_CFG=/tmp/nginx-realip.conf.$RANDOM
CF_V4=$(curl -s https://www.cloudflare.com/ips-v4)
CF_V6=$(curl -s https://www.cloudflare.com/ips-v6)

cat << 'EoF' > ${CF_CFG}
real_ip_recursive on;
real_ip_header X-Forwarded-For;
# real_ip_header CF-Connecting-IP;

## Local
set_real_ip_from 10.0.0.0/8;
set_real_ip_from 127.0.0.0/8;
set_real_ip_from 172.16.0.0/12;
set_real_ip_from 192.168.0.0/16;

EoF

for CF_IP in ${CF_V4} ${CF_V6}; do
  echo "set_real_ip_from ${CF_IP};" >> ${CF_CFG}
done

cat $CF_CFG
rm -f $CF_CFG

Usage

$ nginx_conf_cloudflare_real_ip
real_ip_recursive on;
real_ip_header X-Forwarded-For;
# real_ip_header CF-Connecting-IP;

## Local
set_real_ip_from 10.0.0.0/8;
set_real_ip_from 127.0.0.0/8;
set_real_ip_from 172.16.0.0/12;
set_real_ip_from 192.168.0.0/16;

set_real_ip_from 173.245.48.0/20;
set_real_ip_from 103.21.244.0/22;
set_real_ip_from 103.22.200.0/22;
set_real_ip_from 103.31.4.0/22;
set_real_ip_from 141.101.64.0/18;
set_real_ip_from 108.162.192.0/18;
set_real_ip_from 190.93.240.0/20;
set_real_ip_from 188.114.96.0/20;
set_real_ip_from 197.234.240.0/22;
set_real_ip_from 198.41.128.0/17;
set_real_ip_from 162.158.0.0/15;
set_real_ip_from 104.16.0.0/13;
set_real_ip_from 104.24.0.0/14;
set_real_ip_from 172.64.0.0/13;
set_real_ip_from 131.0.72.0/22;
set_real_ip_from 2400:cb00::/32;
set_real_ip_from 2606:4700::/32;
set_real_ip_from 2803:f800::/32;
set_real_ip_from 2405:b500::/32;
set_real_ip_from 2405:8100::/32;
set_real_ip_from 2a06:98c0::/29;
set_real_ip_from 2c0f:f248::/32;