Qscan

An ultra-fast intranet scanner featuring port scanning, protocol detection, fingerprint identification, brute force cracking, and vulnerability detection. Supports 1200+ protocols, 10,000+ protocol fingerprints, 20,000+ application fingerprints, and over 10 brute force protocols.

Chinese Documentation | English

🚀 Quick Start Guide

📢 Please take a moment to read this documentation—it will help you quickly get familiar with JYso!

🧐 Usage documentation available on Wiki.

✔ Download the latest version from Releases.

👍 Key Features

• Spy mode enables ultra-fast scanning of common B-segments, significantly faster than conventional sequential scanning;
• Combines precise port identification with blazing-fast speed:
  • Thread pool optimization: Reduces memory allocation and GC overhead;
  • Template caching: Minimizes redundant construction;
  • Parallel transmission: Maximizes multi-core CPU utilization;
  • Batch processing: Reduces system calls;
  • Parallel processing pipeline: Parallel receiving, parsing, and processing for maximum efficiency;
  • Buffer optimization: Increased channel buffer size to prevent blocking;

✨ 404Starlink

Qscan has joined 404Starlink

Advantages Over Fscan

• Speed comparison with the same number of ports and threads:

QScan

FScan

References

https://github.com/lcvvvv/kscan

https://github.com/shadow1ng/fscan