Advanced DLP ScenariosExceptions & Exclusions Best Practices

Exceptions & Exclusions Best Practices

25 mins

Understanding the Concept

Exceptions are inevitable: fraud teams need to handle card numbers, HR needs PII access, legal needs unrestricted communication. The key is granting exceptions safely with proper governance.

Types of exceptions include: user/group exclusions, domain whitelisting for partners, specific site exclusions, and per-rule exceptions for certain SITs.

Every exception should be documented, reviewed periodically, and have compensating controls. Use the principle of least privilege - exclude only what's necessary.

Key Points

  • Group-Based: Use security groups for manageable exclusions
  • Domain Whitelist: Trusted partner domains
  • Site/Location: Exclude specific sites or mailboxes
  • Per-Rule: Different exceptions per rule within policy
  • Compensating Controls: Additional monitoring for excluded users

Why This Matters in Real Organizations

Poorly managed exceptions undermine DLP entirely. Overly broad exceptions create security gaps. Properly governed exceptions enable business while maintaining protection where it matters.

Common Mistakes to Avoid

Excluding entire departments instead of specific roles
No review process for exceptions
Using user accounts instead of groups
Forgetting to remove exceptions when no longer needed

Interview Tips

  • Discuss the governance process for exceptions
  • Explain compensating controls concept
  • Mention periodic review requirements

Exam Tips (SC-401)

  • Know how to configure different exception types
  • Understand the inheritance/priority of exceptions
  • Know audit logging for exception usage

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