Importing with Asset Discovery
Asset Discovery is available for free for Jira Service Management Data Center.
Asset Discovery is an agentless scanner (although there is an agent available to get more detailed information) that picks up network assets. You can select which of assets, and which attributes, you pull into your Insight object schemas and you can create your own scanning patterns to find more specific details. If you run it on a schedule it will pick up changes to keep data updated. With automation rules you can even trigger Jira issues, email notifications, and more based on detected changes.