Bean Network Tester v0.5: A Deep Dive into This Open-Source Windows Network Simulation Tool

In software development and quality assurance (QA), simulating various network conditions is an essential testing requirement. Whether you're validating how an app performs on a poor connection or troubleshooting connectivity issues on specific ports, a solid network condition simulator can dramatically boost testing efficiency. The open-source project Bean Network Tester has just released v0.5, bringing a range of practical improvements to Windows developers.

What Is Bean Network Tester: An Open-Source Network Condition Simulator

Bean Network Tester is an open-source network condition simulator for the Windows platform. Its core value lies in helping developers and testers actively create various network scenarios — such as throttling bandwidth, blocking specific connections, and simulating poor network environments — so they can verify application robustness under controlled conditions.

Unlike many commercial network testing tools, Bean Network Tester is fully open source. Anyone can review the source code, contribute to the project, or customize it for their own needs. As of this release, the project has accumulated over 400 downloads and is gradually gaining traction in the community. The author is also actively encouraging users to star the GitHub repository to increase the tool's visibility.

v0.5 Core Updates: Comprehensive Upgrades Across Features, Usability, and Code Quality

This v0.5 release includes 58 commits, with improvements spanning features, usability, and underlying code quality.

Enhanced Network Control Features

The new version delivers a noticeable boost in network control capabilities. A newly added "Internet only" checkbox lets users block LAN traffic with a single click while keeping public internet connections active — particularly useful for testing how an app behaves in a pure internet-only environment.

The connections table also gains new action options such as "Block IP address" and "Leave the process alone", giving users more granular control over network access for individual connections or processes. The app will also display a clear warning when users enable options that would cut off all internet connections, helping prevent accidental misconfigurations.

Improved Search and Interaction Usability

Usability is a major focus of this update. Where users previously had to scroll through numerous controls to find what they needed, a newly added search box makes locating features much easier. The search capabilities of the connections table have also been significantly enhanced:

• Supports structured search by fields such as port, IP, and PID
• Allows filtering by specific port ranges — for example, viewing only connections on ports 430–550
• Moves beyond the previous limitation of raw text-only matching

Users can now also hide columns in the connections table (the author openly acknowledges there were too many columns before), and can copy "session/live" values from the statistics tab. Traffic display has been upgraded from raw byte counts (e.g., 319083219B) to human-readable KB, MB, and GB formats, making the data far more legible.

Engineering Improvements: CI Automation, Security Scanning, and Real-Device Testing

Beyond user-facing features, the engineering quality investments in v0.5 are particularly noteworthy — this is the part of the update that best reflects the project's growing maturity.

Semgrep Security Scanning and Automated CI/CD

The author has implemented multiple CI/CD workflows on GitHub, incorporating Semgrep security scanning, Ruff linting, and other quality and security tools. This means every code change is automatically subjected to static analysis, helping catch potential vulnerabilities and code issues early.

A Testing Framework Built on Real Network Conditions

Perhaps even more impressive is the fact that the author has set up dedicated test machines to run the full test suite before each new release. The entire process takes approximately 1–2 hours and is specifically designed to verify the program's behavior under real network connections. For a personally maintained open-source tool, this level of commitment to stability is genuinely commendable, and it lays a solid foundation for the tool's reliability.

Windows Code Signing and Package Manager Distribution

This build includes Windows code signing, which helps reduce system security warnings and builds user trust. The author has also adjusted the app data save path to align with mainstream package manager distribution conventions. The application has been submitted to both Chocolatey and Winget — the two major Windows package manager platforms — and is currently awaiting manual review. Once approved, users will be able to install the tool via the command line in a single step, further lowering the barrier to entry.

Roadmap and Future Plans

Looking ahead, the author plans to continue expanding more network simulation options and already has some preliminary ideas in mind, while welcoming feature suggestions from the community. The author is also working on a second QA-focused tool called Testing Files Generator, though that project is currently less stable than Bean Network Tester.

Conclusion

The Bean Network Tester v0.5 update is a textbook example of an open-source tool evolving from "functional" to "polished": it combines user-facing feature and experience improvements with engineering-quality foundations like CI automation, security scanning, and real-device testing. For developers and QA engineers who need to simulate network conditions on Windows, this is an open-source alternative well worth keeping an eye on. With the addition of Chocolatey and Winget distribution channels, its accessibility and adoption are poised to grow further.