Build an Identity Spoofing Detection Tool
Create a network-level monitoring system that identifies IP, MAC, and ARP spoofing attempts — helping detect impersonation attacks and protect internal infrastructures.Identity spoofing involves falsifying source identities — such as IP or MAC addresses — to impersonate trusted devices or users. This allows attackers to bypass access controls, hijack sessions, or launch man-in-the-middle attacks. Early detection is essential to mitigate these threats.
This tool listens for abnormal patterns across ARP tables, IP/MAC bindings, and user session logs. It flags conflicting identity records, unauthorized device appearances, and suspicious packet origins by correlating real-time network data with known baselines.
ARP Spoofing Detection
Monitor ARP table changes and detect conflicting MAC-to-IP mappings.
MAC/IP Address Conflict Alerts
Identify instances where the same IP is seen from multiple MAC addresses or vice versa.
Session and Login Monitoring
Track user logins and detect anomalies like location, timing, or concurrent access clashes.
Live Alerts and Logs
Trigger alerts via CLI, email, or dashboard when identity spoofing is suspected.
The tool captures network packets and scans ARP tables to track device identity mappings. It builds a baseline of valid IP–MAC pairs and alerts on any deviation or duplication. Login tracking modules verify if a user identity is active in multiple places simultaneously or from improbable locations.
- Scan the local ARP cache or use packet sniffers to monitor MAC/IP mappings in real time.
- Log each device's historical identity for anomaly comparison.
- Track active sessions and login sources for users in multi-user environments.
- Flag spoofing attempts when inconsistencies or impersonations are detected.
- Export reports and logs for investigation or auditing purposes.
Packet Capture
Scapy or pyshark to sniff network traffic and parse Ethernet/ARP headers.
ARP Table Access
Use 'arp -a' via subprocess in Python, or parse `/proc/net/arp` on Linux.
Spoofing Logic
Python with rule-based checks for MAC/IP duplication, timing mismatches, or spoofing signatures.
Alerts & Reporting
Flask for dashboard, SMTP/email integration, or local file logs for alerts.
1. Capture ARP and IP/MAC Mappings
Use packet sniffers or system APIs to monitor current device associations on the network.
2. Build Baseline Identity Map
Record trusted IP-MAC-user associations and detect changes over time.
3. Implement Spoofing Rules
Flag duplicate IP usage, sudden MAC changes, or overlapping device identities.
4. Track User Login Activity (Optional)
Correlate spoof detection with user authentication logs (e.g., Linux PAM or AD logs).
5. Create UI or Alert System
Display suspicious behavior and notify via dashboard, logs, or email alerts.
Stop Impersonation Before It Spreads
Build a smart tool that actively monitors identity spoofing attempts — protecting your network from stealthy and damaging impersonation attacks.
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