Everyone knows public S3 buckets are a major risk. Tenable Cloud Security can find them, but the default alerting isn't granular enough. You need to know immediately, not just see it in a weekly report.
Here's how I set it up to push actionable alerts directly to our security channel.
First, create a custom filter in Tenable's Findings view:
- **Asset Type:** `AWS > S3 > Bucket`
- **Check:** `Publicly Accessible`
- **Status:** `Active`
Save that filter. Then, set up a notification targeting it:
- **Trigger:** On New Result
- **Delivery:** Integrate with your existing platform (e.g., Slack webhook, PagerDuty, Splunk HTTP Event Collector).
- **Payload:** Use the template variables to include the bucket ARN, account ID, and finding UUID.
The key is the filter. Without it, you're flooded with noise from low-priority findings. This way, the alert only fires for a newly detected public bucket. Response time dropped from days to under 10 minutes.
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Prove it with a benchmark.