🌐 WiFi Network Analyzer

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Overview

WiFi Network Analyzer is a full-stack application for monitoring and controlling small network environments. It allows administrators to track network traffic, monitor connected devices, and block specific domains as needed.

The system uses a Linux machine configured with hostapd to act as a WiFi router and tcpdump to capture DNS traffic. All captured data is stored in MongoDB, and a frontend dashboard provides a single admin interface to visualize network activity and manage access.

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Key Features

• 🌐 Network monitoring: Track which IP addresses visited which domains and how many times
• 📊 WiFi details: Display bandwidth, security type, range, and other basic WiFi information
• 🛑 Domain blocking: Block specific domains for controlled access
• 📝 Traffic logging: Capture DNS requests on port 53 using tcpdump
• 🔐 Single admin access: Frontend dashboard for administration and monitoring
• ☁️ MongoDB backend: Store all traffic logs for analysis

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Tech Stack

• Linux: Hostapd configured as WiFi router
• Network Monitoring: tcpdump for DNS traffic capture
• Database: MongoDB for logging traffic
• Backend: Node.js / Express.js API
• Frontend: React dashboard with single admin access

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Setup & Installation

1. Configure Linux machine as router

   • Install and configure hostapd and DHCP/DNS according to your network needs.

2. Install MongoDB

   • Store captured network logs and analytics.

3. Capture DNS traffic

   • Use tcpdump on port 53 to intercept DNS requests:

     sudo tcpdump -i <interface> port 53 -w dns_logs.pcap

   • Forward captured data to MongoDB via your backend.

4. Backend API

   • Implement API endpoints to fetch logs, block domains, and serve frontend data.

5. Frontend Dashboard

   • React app to visualize connected IPs, domains visited, number of requests, and WiFi details.
   • Admin can block/unblock domains from the dashboard.

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Usage

1. Connect devices to the WiFi network hosted on the Linux router.
2. Access the admin dashboard via the browser.
3. Monitor traffic, check WiFi metrics, and block domains as required.
4. All actions are logged in MongoDB for auditing and reporting.

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Security & Privacy Considerations

• Only deploy in networks you control.
• Capturing DNS traffic can include sensitive user activity; ensure secure access to MongoDB and frontend dashboard.
• Use strong admin authentication for the dashboard.

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