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NSClient Monitoring Agent
NSClient++ (also known as NSClient or NC_Net Client) is a monitoring agent designed primarily to extend the functionality of popular network monitoring solutions such as Nagios, OP5, and Opsview. It enables the collection, aggregation, and distribution of performance metrics, health status information, and service checks from Windows-based systems, facilitating comprehensive infrastructure monitoring..
NSClient++ operates as a lightweight daemon running on Windows systems, primarily designed to communicate seamlessly with Nagios and related network monitoring suites. It allows central monitoring servers to remotely execute checks, gather system metrics, and retrieve service statuses, making it simpler to track the health of Windows environments in a heterogeneous network.
Technically, NSClient++ supports multiple communication protocols, including NRPE, NSClient, NRDP, and HTTP API. This flexible support enables various methods for issuing queries and retrieving data, such as command checks, performance counters, log parsing, and external script execution, including Python, Lua, and .NET scripts. Such extensibility allows tailored monitoring solutions that can adapt to unique operational requirements.
The agent bridges the monitoring servers with Windows internals, enabling the collection of CPU, disk, memory, service status, event logs, and application-specific information. It simplifies complex scripting by wrapping native system commands or external scripts, standardizing the output for compatibility with monitoring dashboards.