Leetha is a passive network fingerprinting and analysis engine.
It identifies devices on a network by analysing broadcast traffic and protocol exchanges, combining passive observation with optional active service probing to build a device inventory, detect anomalies, and map the attack surface.
This is free and open source software.
Key Features
- Passive-first device discovery without agents, credentials, or device cooperation.
- Optional active probing for deeper service and protocol identification.
- Multi-evidence fingerprinting with weighted confidence scoring.
- Uses protocol sources such as DHCP, mDNS, TCP/IP fingerprints, TLS fingerprints, service banners, and MAC vendor data.
- Captures device hostnames, service ports, model names, and other identity clues.
- Infrastructure-aware filtering to reduce noisy multicast-derived results.
- Device inventory with analyst-editable owner, location, criticality, tags, and notes.
- Includes CLI tools and a web dashboard.
- Attack surface analysis, spoofing detection, and presence monitoring.
Website: github.com/tjnull/leetha
Support:
Developer: tjnull
License: GNU General Public License v3.0
Leetha is written in Python. Learn Python with our recommended free books and free tutorials.
Related Software
| Passive OS Fingerprinting | |
|---|---|
| PacketFence | Network access control solution with passive DHCP fingerprinting |
| Ettercap | Comprehensive suite for man in the middle attacks |
| PRADS | Passive Real-time Asset Detection System |
| p0f | Array of passive traffic fingerprinting mechanisms that are highly scalable |
| satori | Python rewrite of passive OS fingerprinting tool |
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