check_nids_interfaces

check_nids_interfaces is a Nagios plugin designed to test NIDS sensor network capture interfaces for specified traffic in order to check if the interface is receiving monitored flows. The plugin's purpose is to aid with the problem of monitoring what is effectively a passive service; when network flows cease to arrive at passive monitoring devices, there is seldom a noticeable service outage. Even a partial outage may go undetected, if at least a single link is functioning and feeding traffic to the device. This plugin is designed to make passive traffic inspection a monitorable service.

This plugin is implemented using Bash.