map

cloudflare/cloudflare-ddns.sh

@@ -0,0 +1,51 @@
+#!/bin/bash
+
+echo "[$(date)] --- DDNS Check Started ---"
+
+# 1. Validate variables are not empty
+if [ -z "$CF_API_TOKEN" ] || [ -z "$CF_ZONE_ID" ] || [ -z "$CF_RECORD_NAME" ]; then
+    echo "ERROR: One or more environment variables (TOKEN, ZONE_ID, RECORD_NAME) are missing!"
+    exit 1
+fi
+
+# 2. Get current public IP (Trying two services for reliability)
+NEW_IP=$(curl -s https://api.ipify.org || curl -s https://ifconfig.me/ip)
+
+if [[ ! $NEW_IP =~ ^[0-9]{1,3}(\.[0-9]{1,3}){3}$ ]]; then
+    echo "ERROR: Could not get a valid Public IP."
+    exit 1
+fi
+
+# 3. Get the current Record info from Cloudflare
+RECORD_DATA=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones/$CF_ZONE_ID/dns_records?name=$CF_RECORD_NAME&type=A" \
+     -H "Authorization: Bearer $CF_API_TOKEN" \
+     -H "Content-Type: application/json")
+
+# Extract Record ID and Current IP from the JSON response
+RECORD_ID=$(echo "$RECORD_DATA" | jq -r '.result[0].id // empty')
+OLD_IP=$(echo "$RECORD_DATA" | jq -r '.result[0].content // empty')
+
+if [ -z "$RECORD_ID" ]; then
+    echo "ERROR: Could not find DNS record for $CF_RECORD_NAME. Check your Zone ID and Name."
+    exit 1
+fi
+
+# 4. Compare and Update
+if [ "$NEW_IP" = "$OLD_IP" ]; then
+    echo "IP is still $OLD_IP. No update needed."
+else
+    echo "IP changed from $OLD_IP to $NEW_IP. Updating Cloudflare..."
+    
+    UPDATE_RESPONSE=$(curl -s -X PUT "https://api.cloudflare.com/client/v4/zones/$CF_ZONE_ID/dns_records/$RECORD_ID" \
+         -H "Authorization: Bearer $CF_API_TOKEN" \
+         -H "Content-Type: application/json" \
+         --data "{\"type\":\"A\",\"name\":\"$CF_RECORD_NAME\",\"content\":\"$NEW_IP\",\"ttl\":120,\"proxied\":false}")
+    
+    SUCCESS=$(echo "$UPDATE_RESPONSE" | jq -r '.success')
+    
+    if [ "$SUCCESS" = "true" ]; then
+        echo "SUCCESS: Cloudflare updated to $NEW_IP"
+    else
+        echo "FAILURE: Update failed. Response: $UPDATE_RESPONSE"
+    fi
+fi