Tenable.io: Concurrent Active Scan Limit

Tenable applies rate limiting and concurrency limiting to the Tenable.io API to ensure that all customers experience the same level of service. A new concurrency limit has been added for active scans. You can have a maximum of 400 active scans per Tenable.io container.

An HTTP response message with a 429 (Too Many Requests) status code is returned if you attempt to launch more than 400 scans. The response also includes a retry-after header element that specifies the number of seconds to wait before retrying. For more information, see Concurrency Limiting and Rate Limiting.

This update applies to the following endpoints:

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Tip

To get the count of active scans in your container, use the Get scan count endpoint with the query parameter active set to true.