synscan ☆
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Description:
Asynchronous half-open TCP portscanner
Type: Formula  |  Tracked Since: Dec 28, 2025
Links: Homepage  |  formulae.brew.sh
Category: Security
Tags: portscanner networking security syn-scan reconnaissance
Install: brew install synscan
About:
Synscan is an asynchronous half-open TCP portscanner designed for high-speed network reconnaissance. It utilizes raw sockets to perform SYN scans, allowing for rapid detection of open ports without completing full TCP connections. This technique makes it faster and stealthier than traditional connection-based scanners.
Key Features:
  • Asynchronous I/O for high performance
  • SYN (half-open) scanning technique
  • Support for custom port ranges and packet rates
  • Command-line interface for scripting and automation
Use Cases:
  • Network security auditing and penetration testing
  • Identifying listening services on target systems
  • Mapping firewall rules and network topology
Alternatives:
  • nmap – Nmap is a comprehensive suite offering multiple scan types, OS detection, and scripting, whereas Synscan focuses specifically on fast, asynchronous SYN scanning.
  • masscan – Masscan is optimized for scanning the entire internet, prioritizing massive throughput; Synscan offers a more lightweight approach for targeted scans.
Version History
Detected Version Rev Change Commit
Sep 13, 2024 12:24am 1 VERSION_BUMP a9c4a3aa
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