Update cloudflare IPs from remote server

cloudflare.sh

#!/bin/bash

# === CONFIG ===
CF_API_TOKEN="token"
CF_ZONE_ID="id"
CF_RECORD_ID="record_id"
CF_RECORD_NAME="el_name"

# === GET IPs ===
CURRENT_IP=$(curl -s https://ipv4.icanhazip.com | tr -d '\n')
DNS_IP=$(dig +short "$CF_RECORD_NAME" @1.1.1.1)

# === COMPARE ===
if [ "$CURRENT_IP" = "$DNS_IP" ]; then
  echo "[✓] IP unchanged: $CURRENT_IP"
  exit 0
fi

# === UPDATE ===
echo "[!] IP changed: $DNS_IP → $CURRENT_IP"
RESPONSE=$(curl -s -X PUT "https://api.cloudflare.com/client/v4/zones/$CF_ZONE_ID/dns_records/$CF_RECORD_ID" \
  -H "Authorization: Bearer $CF_API_TOKEN" \
  -H "Content-Type: application/json" \
  --data "{\"type\":\"A\",\"name\":\"$CF_RECORD_NAME\",\"content\":\"$CURRENT_IP\",\"ttl\":300,\"proxied\":false}")

echo "$RESPONSE"


# Hacerlo ejecutable -> chmod +x ~/update-cloudflare-ip.sh
# agregarlo a crontab -> crontab -e
# corriendo cada 5 min -> */5 * * * * /home/martin/update-cloudflare-ip.sh >> /var/log/cloudflare-ddns.log 2>&1