Necktools

The archive contains the following lightweight command line tools for 64-bit versions of Windows:

• Neckinfo. Provides a detailed report of a Windows system's main components (network, storage, CPU etc) which is saved into a text-file (neckinfo_report.txt)
• Neckfinder. A hash-based, multi-threaded locator of duplicate files. The output is stored into textfiles (i.e. logfile1.txt, logfile2.txt etc) in the same directory where the app is executed from. Neckfinder uses SHA-256, a strong cryptographic hash, via the Windows CryptoAPI.
• NeckSimCLI. A TCP proxy with simulated network issues.

More On NeckSimCLI

This tool sits between a client and a target server to intentionally introduce issues like latency and packet loss to the traffic passing through it. In other words NeckSimCLI is a proxy that facilitates Network Condition Simulation.

Usage: necksimcli <listen_port> <target_host> <target_port> [latency_ms] [loss_percent]

Example: necksimcli 8080 www.example.com 443 100 5.0

Also check out NeckSim Pro.

The pro version introduces a packet queue for each stream, allowing packets to be delayed for jitter/latency or queued for throttling. These and other settings are retrieved from an external configuration file.

Note: NeckSimCLI does not handle SSL/TLS termination. It does not look inside data to see if it is HTTP, or if it's encrypted using SSL/TLS (denoted by HTTPS).

Disclaimer: You can only use NeckSimCLI inside your own private network(s) or local virtual machines. Using these types of tools against a third-party server (not including www.example.com) may violate that server's Terms of Service (ToS) and could lead to you being blocked or investigated for malicious activity.

Version history

• ver 1.0 - First Release (October 2025)