UFW block 89 and 443, allow only access from Cloudflare proxy

whitelist_cloudflare.sh

#!/bin/bash

CLOUDFLARE_IPS_V4=$(/usr/bin/curl -s --max-time 10 https://www.cloudflare.com/ips-v4)
CLOUDFLARE_IPS_V6=$(/usr/bin/curl -s --max-time 10 https://www.cloudflare.com/ips-v6)

if [ -n "$CLOUDFLARE_IPS_V4" ] && [ -n "$CLOUDFLARE_IPS_V6" ]; then
  /usr/sbin/ufw --force reset
  /usr/sbin/ufw default allow incoming
  /usr/sbin/ufw default allow outgoing
  for IP in $CLOUDFLARE_IPS_V4; do
    /usr/sbin/ufw allow from $IP to any port 80
    /usr/sbin/ufw allow from $IP to any port 443
  done
  for IP in $CLOUDFLARE_IPS_V6; do
    /usr/sbin/ufw allow from $IP to any port 80
    /usr/sbin/ufw allow from $IP to any port 443
  done
  /usr/sbin/ufw deny 80/tcp
  /usr/sbin/ufw deny 443/tcp
  /usr/sbin/ufw --force enable
fi