Configuration

# HTTP to HTTPS
if ($scheme = http) {
    return 301 https://$host$request_uri;
}

# Proxy
location / {
    include /etc/nginx/proxy_params;
    proxy_pass http://127.0.0.1:5000/;
}

# Custom robots.txt
location = /robots.txt {
    add_header Content-Type text/plain;
    return 200 "User-agent: *\nDisallow: /\n";
}

# Activate HTTP2 (1.9.5+)
listen 443 ssl http2;

Rate limiting

# Use $http_cf_connecting_ip instead of $binary_remote_addr when behind Cloudflare
limit_req_zone $http_cf_connecting_ip zone=php_limit:10m rate=10r/s;
limit_req_log_level warn;

location ~ \.php$ {
    limit_req zone=php_limit burst=50;
}

# Test using bash
for i in $(seq 1 30); do curl -I -s "https://[HOST]/" | head -n 1; done

Real IP

To get current IPv4 Cloudflare ranges see the official list.

# Get Real IP from Cloudflare
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;
real_ip_header CF-Connecting-IP;