RustScan

Overview

RustScan focuses on identifying open ports rather than replacing a broader network-analysis workflow. The project says it can scan all 65,000 ports in three seconds, a speed claim that makes it appealing when quick initial discovery matters. Discovered ports can then pass automatically to Nmap for further analysis, giving users a way to extend the scan without treating RustScan as a complete analysis suite.

The tool is a free, GPL-3.0-licensed CLI with network scan scope. Its service and OS detection, plus greppable-text export, provide useful results for command-line workflows. Users who need a graphical interface should look elsewhere.

Key features

• Port discovery: RustScan is built to find open ports quickly, and the project cites a three-second scan of all 65,000 ports. That is a compelling stated target for rapid discovery, though real-world scan times can depend on the environment.
• Nmap handoff: Automatically piping discovered ports into Nmap connects fast discovery with further analysis. This is a practical fit for users who already include Nmap in their workflow.
• Flexible scan inputs: IPv6, CIDR, and file input support accommodate different address ranges and input workflows.
• Scripting: Python, Lua, and Shell support let users build scripting into their use of the scanner. That flexibility favors technical users over people seeking a point-and-click tool.
• Adaptive learning: RustScan says its adaptive features use information about the scan environment and usage to improve over time. The project also checks in continuous integration for significant slowdowns against the previous version and says its testing aims to ensure accessibility.

Pricing

RustScan is free: its RustScan plan costs 0.00 USD per free and describes an open-source port scanner. There are no paid tiers to weigh against feature limits. The project is GPL-3.0 licensed, so readers evaluating it for redistribution should consider that license.

Platforms

RustScan is listed for Android, Linux, macOS, self-hosted use, and Windows, but installation guidance makes Linux the more confident choice: the maintainer says RustScan has been tested only on Linux and warns macOS or Windows may have issues. Cargo is the only officially supported installation method; releases and package-manager options are also provided. The guide recommends Docker and says its image works on all systems, including Windows, which is not officially supported.

macOS users face an additional practical concern: a low open-file limit can significantly affect scans. If installation or operation runs into trouble, the guide directs users to open a GitHub issue.

Who it's for

RustScan suits technically capable users who want quick port discovery, use a command line, and value a direct route from discovered ports into Nmap. Its scan inputs and scripting support add room for varied workflows. It is a weaker fit for users who need a polished graphical experience, dependable support across operating systems, or a scanner that handles broader analysis without a separate tool.

Pros and cons

• Pro: The project’s stated 65,000-port, three-second scan target makes speed a clear reason to consider it for initial discovery.
• Pro: Automatic Nmap handoff joins port discovery with a route to further analysis.
• Pro: IPv6, CIDR, file input, and Python, Lua, and Shell scripting support a range of command-line workflows.
• Con: Cargo is the only officially supported installation route, which may be less convenient for users who prefer other setup methods.
• Con: The maintainer’s testing has been limited to Linux, and macOS and Windows may have issues; macOS’s low open-file limit can also affect scans significantly.

Alternatives

Compare port scanner software if you want to consider a broader set of tools. Choose Naabu instead for another free port-scanning option, available on Linux, macOS, Windows, API, and self-hosted platforms. Angry IP Scanner is another free, open-source option for Linux, macOS, or Windows. Choose Nmap if you want a free scanner in its own right rather than RustScan’s Nmap handoff. ScanSearch offers a freemium Internet Scanner plan priced at 0.30 USD per month, billed per kpps/month, with 100–10,000 kpps, unlimited results per scan, full CSV/JSON export, and a queue of up to 10 scans. Unicornscan is a free GPL option with downloadable packages and source. Pentest-Tools Port Scanner has a free tier for open-port and service discovery, with free-tier limits unspecified. NetsCLI is MIT-licensed and offers a library and MCP server on crates.io for Rust projects. Nmap Online Scan is a web-based freemium alternative.

Verdict

RustScan is a strong choice for CLI users who want quick port discovery and an automatic path into Nmap. Its free, focused toolset is attractive, but choose another option if cross-platform confidence, a graphical interface, or broader analysis in one tool matters more than speed and handoff.