Database lock monitoring in Oracle

 

Exadata Security Part 1

 

Exadata Security — 3 Pillars (what every DBA/architect must own)

1) Transparent Data Encryption (TDE) — Data at rest
Encrypt tablespaces, redo, and backups with TDE — no app changes.

Use centralized key management (HSM / Oracle KMS) and rotate keys regularly.

Verify backup encryption & test restores — encryption is only useful if you can recover.

2) Network Security — Data in motion & surface area
Segment the Exadata interconnect (RoCE/InfiniBand) and use private subnets for storage traffic.

Harden endpoints in ExaCC: private endpoints + tight routing rules → reduce blast radius.

Encrypt in transit (TLS between clients and DB; secure fabric for node-to-node comms).

3) Database-Level Integration — Policy + Visibility
Use RBAC + least-privilege roles; avoid broad ADMIN grants.

Centralize IAM & integrate with enterprise SSO where possible.

Enable comprehensive auditing + log forwarding to SIEM for anomaly detection.

💡 Quick Practical Checklist (do these this week)

1. Confirm TDE is enabled for production tablespaces & backups.

2. Validate VCN/subnet segmentation and block public access to storage networks.

3. Turn on unified auditing and push logs to your SIEM.

🔥Real insight: Exadata is engineered for performance — but the same architecture that speeds queries also widens attack surfaces if networking and key management aren’t tightly controlled. Security is an architectural discipline, not a checkbox.

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