#!/bin/sh
# Cloudflare API credentials and domain details
CLOUDFLARE_EMAIL="cloudflare-email@gmail.com"
CLOUDFLARE_API_KEY="cloudflare-api-key"
FULL_DOMAIN_NAME="yourdomain.com" # Set to "www.yourdomain.com" for subdomain (e.g., www.yourdomain.com) or "yourdomain.com" for root domain
UPDATE_TYPE="both" # Options: "ipv4", "ipv6", "both"
LOG_FILE="/tmp/cloudflare_ddns.log"
IP_FILE_IPV4="/tmp/cloudflare_current_ip"
IP_FILE_IPV6="/tmp/cloudflare_current_ip6"
echo "Starting Cloudflare DDNS update script for ${FULL_DOMAIN_NAME}..."
# Extract DOMAIN_NAME from FULL_DOMAIN_NAME
DOMAIN_NAME=$(echo $FULL_DOMAIN_NAME | awk -F. '{print $(NF-1)"."$NF}')
# Fetch Cloudflare Zone ID
echo "Fetching Cloudflare Zone ID..."
ZONE_RESPONSE=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones?name=${DOMAIN_NAME}" \
-H "X-Auth-Email: ${CLOUDFLARE_EMAIL}" \
-H "X-Auth-Key: ${CLOUDFLARE_API_KEY}" \
-H "Content-Type: application/json")
CLOUDFLARE_ZONE_ID=$(echo $ZONE_RESPONSE | grep -o '"id":"[^"]*' | head -n 1 | grep -o '[^"]*$')
if [ -z "$CLOUDFLARE_ZONE_ID" ]; then
echo "Failed to fetch Cloudflare Zone ID."
exit 1
fi
echo "Cloudflare Zone ID is ${CLOUDFLARE_ZONE_ID}"
# Get the current public IPv4 address if needed
if [ "$UPDATE_TYPE" = "ipv4" ] || [ "$UPDATE_TYPE" = "both" ]; then
echo "Fetching current public IPv4 address..."
CURRENT_IP=$(curl -s http://checkip.amazonaws.com)
if [ -z "$CURRENT_IP" ]; then
echo "Failed to fetch current public IPv4 address."
exit 1
fi
echo "Current public IPv4 address is ${CURRENT_IP}"
fi
# Get the current public IPv6 address if needed
if [ "$UPDATE_TYPE" = "ipv6" ] || [ "$UPDATE_TYPE" = "both" ]; then
echo "Fetching current public IPv6 address..."
CURRENT_IP6=$(curl -s http://ipv6.icanhazip.com)
if [ -z "$CURRENT_IP6" ]; then
echo "Failed to fetch current public IPv6 address."
exit 1
fi
echo "Current public IPv6 address is ${CURRENT_IP6}"
fi
# Get the Cloudflare Record ID for IPv4 if needed
if [ "$UPDATE_TYPE" = "ipv4" ] || [ "$UPDATE_TYPE" = "both" ]; then
echo "Fetching Cloudflare Record ID for IPv4..."
RECORD_RESPONSE_IPV4=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones/${CLOUDFLARE_ZONE_ID}/dns_records?name=${FULL_DOMAIN_NAME}&type=A" \
-H "X-Auth-Email: ${CLOUDFLARE_EMAIL}" \
-H "X-Auth-Key: ${CLOUDFLARE_API_KEY}" \
-H "Content-Type: application/json")
CLOUDFLARE_RECORD_ID_IPV4=$(echo $RECORD_RESPONSE_IPV4 | grep -o '"id":"[^"]*' | head -n 1 | grep -o '[^"]*$')
if [ -z "$CLOUDFLARE_RECORD_ID_IPV4" ]; then
echo "Failed to fetch Cloudflare Record ID for IPv4."
echo "Response was: $RECORD_RESPONSE_IPV4"
exit 1
fi
echo "Cloudflare Record ID for IPv4 is ${CLOUDFLARE_RECORD_ID_IPV4}"
fi
# Get the Cloudflare Record ID for IPv6 if needed
if [ "$UPDATE_TYPE" = "ipv6" ] || [ "$UPDATE_TYPE" = "both" ]; then
echo "Fetching Cloudflare Record ID for IPv6..."
RECORD_RESPONSE_IPV6=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones/${CLOUDFLARE_ZONE_ID}/dns_records?name=${FULL_DOMAIN_NAME}&type=AAAA" \
-H "X-Auth-Email: ${CLOUDFLARE_EMAIL}" \
-H "X-Auth-Key: ${CLOUDFLARE_API_KEY}" \
-H "Content-Type: application/json")
CLOUDFLARE_RECORD_ID_IPV6=$(echo $RECORD_RESPONSE_IPV6 | grep -o '"id":"[^"]*' | head -n 1 | grep -o '[^"]*$')
if [ -z "$CLOUDFLARE_RECORD_ID_IPV6" ]; then
echo "Failed to fetch Cloudflare Record ID for IPv6."
echo "Response was: $RECORD_RESPONSE_IPV6"
exit 1
fi
echo "Cloudflare Record ID for IPv6 is ${CLOUDFLARE_RECORD_ID_IPV6}"
fi
# Compare with the previous IPv4 address if needed
if [ "$UPDATE_TYPE" = "ipv4" ] || [ "$UPDATE_TYPE" = "both" ]; then
if [ -f "$IP_FILE_IPV4" ]; then
LAST_IP=$(cat "$IP_FILE_IPV4")
else
LAST_IP=""
fi
if [ "$CURRENT_IP" != "$LAST_IP" ]; then
echo "IPv4 address has changed. Updating Cloudflare DNS record..."
RESPONSE=$(curl -s -X PUT "https://api.cloudflare.com/client/v4/zones/${CLOUDFLARE_ZONE_ID}/dns_records/${CLOUDFLARE_RECORD_ID_IPV4}" \
-H "X-Auth-Email: ${CLOUDFLARE_EMAIL}" \
-H "X-Auth-Key: ${CLOUDFLARE_API_KEY}" \
-H "Content-Type: application/json" \
--data '{"type":"A","name":"'${FULL_DOMAIN_NAME}'","content":"'${CURRENT_IP}'","ttl":120,"proxied":false}')
if echo "$RESPONSE" | grep -q '"success":true'; then
echo "IPv4 DNS record updated successfully."
echo "$CURRENT_IP" > "$IP_FILE_IPV4"
UPDATE_REQUIRED=true
else
echo "Failed to update IPv4 DNS record. Response: $RESPONSE"
fi
echo "$(date) - IPv4: $RESPONSE" >> "$LOG_FILE"
else
echo "IPv4 address has not changed. No update needed."
fi
fi
# Compare with the previous IPv6 address if needed
if [ "$UPDATE_TYPE" = "ipv6" ] || [ "$UPDATE_TYPE" = "both" ]; then
if [ -f "$IP_FILE_IPV6" ]; then
LAST_IP6=$(cat "$IP_FILE_IPV6")
else
LAST_IP6=""
fi
if [ "$CURRENT_IP6" != "$LAST_IP6" ]; then
echo "IPv6 address has changed. Updating Cloudflare DNS record..."
RESPONSE=$(curl -s -X PUT "https://api.cloudflare.com/client/v4/zones/${CLOUDFLARE_ZONE_ID}/dns_records/${CLOUDFLARE_RECORD_ID_IPV6}" \
-H "X-Auth-Email: ${CLOUDFLARE_EMAIL}" \
-H "X-Auth-Key: ${CLOUDFLARE_API_KEY}" \
-H "Content-Type: application/json" \
--data '{"type":"AAAA","name":"'${FULL_DOMAIN_NAME}'","content":"'${CURRENT_IP6}'","ttl":120,"proxied":false}')
if echo "$RESPONSE" | grep -q '"success":true'; then
echo "IPv6 DNS record updated successfully."
echo "$CURRENT_IP6" > "$IP_FILE_IPV6"
UPDATE_REQUIRED=true
else
echo "Failed to update IPv6 DNS record. Response: $RESPONSE"
fi
echo "$(date) - IPv6: $RESPONSE" >> "$LOG_FILE"
else
echo "IPv6 address has not changed. No update needed."
fi
fi
if [ "$UPDATE_REQUIRED" = false ]; then
echo "No updates were required for either IPv4 or IPv6."
fi
echo "Cloudflare DDNS update script completed."
exit 0
