✨ utools - IP Information & Diagnostics Webapp ✨

A modern web application that displays detailed information about a client's IP address, including geolocation, ASN, rDNS, and provides network diagnostic tools like Ping, Traceroute, DNS Lookup, Subnet Calculation, and WHOIS Lookup. It also allows looking up information for any public IP address.

Preview: https://utools.mrunk.de

🚀 Features

• Client IP Info: Automatically detects and displays the visitor's public IP address.
• Geolocation: Shows Country, Region, City, Postal Code, Coordinates, and Timezone based on the IP.
• ASN Information: Displays the Autonomous System Number (ASN) and organization name.
• Reverse DNS (rDNS): Performs a reverse DNS lookup for the IP address.
• Interactive Dark Mode Map: Visualizes the geolocation on a dark-themed OpenStreetMap/CartoDB map.
• Glassmorphism UI: Features a premium, modern transparent design with animated gradients.
• IP Lookup: Allows users to enter any public IP address to retrieve its Geo, ASN, and rDNS information.
• Traceroute: Initiates a server-side traceroute (via SSE stream) to the client's IP or a looked-up IP.
• Ping: Performs a server-side ping test to a looked-up IP.
• DNS Lookup: Performs various DNS record lookups (A, AAAA, MX, NS, TXT, SOA) for a given domain.
• Subnet Calculator: Calculates network details (address ranges, usable hosts) for IPv4 subnets.
• WHOIS Lookup: Retrieves WHOIS information for a given domain or IP address.
• MAC Address Lookup: Identifies the vendor/manufacturer of a network interface using OUI data.
• Port Scan: Scans common ports of a target IP (via SSE stream).
• Dockerized: both frontend and backend are containerized for easy deployment.

📚 API Usage

The backend exposes several RESTful endpoints that return JSON data.

Endpoint	Method	Params	Description
/api/ipinfo	GET	None	Returns info for the requestor's IP.
/api/lookup	GET	targetIp	Returns Geo/ASN info for a specific IP.
/api/dns-lookup	GET	domain, type	Resolves DNS records (A, AAAA, MX, etc.).
/api/whois-lookup	GET	query	Performs a WHOIS lookup for a domain or IP.
/api/mac-lookup	GET	mac	Returns the vendor for a MAC address.
/api/ping	GET	targetIp	Pings an IP address (returns 4 packets).
/api/traceroute	GET	targetIp	Streams traceroute hops via Server-Sent Events (SSE).
/api/port-scan	GET	targetIp	Streams port scan results via Server-Sent Events (SSE).

Examples

Lookup an IP:

curl "http://localhost:3000/api/lookup?targetIp=8.8.8.8"

DNS Lookup:

curl "http://localhost:3000/api/dns-lookup?domain=google.com&type=A"

MAC Vendor Lookup:

curl "http://localhost:3000/api/mac-lookup?mac=00:50:56:C0:00:08"

🛠️ Tech Stack

• Backend: Node.js, Express.js, MaxMind GeoLite2, oui, whois-json, @sentry/node.
• Frontend: Vanilla JS, Tailwind CSS, Leaflet.js.
• Deployment: Docker, GitHub Actions.

🏁 Getting Started

Using Pre-built Images (Recommended)

1. Create compose.yml: (See provided compose.yml in repository)

2. Start:

   docker compose up -d

3. Access: http://localhost:8080

⚙️ Configuration

Key environment variables for the backend:

• NODE_ENV: production or development.
• PORT: Internal port (default 3000).
• RATE_LIMIT_MAX: Requests per window (e.g., 50).
• SENTRY_DSN: Optional Sentry integration.

🌐 Data Sources

• Geolocation: MaxMind GeoLite2.
• Map Tiles: OpenStreetMap & CartoDB.
• MAC Data: IEEE OUI.

📜 License

MIT License.