Data Loss Prevention Review Workflow
Identify sensitive data egress paths, monitor and block their misuse, review findings, and tune rules with the data owners to reduce false positives.
Objective
Detect and limit sensitive data leaving approved systems through email, uploads, or code.
Environment
- A DLP tool or egress monitoring
- Sensitive data classifiers and owners
Steps
1. Map the paths where sensitive data
Map the paths where sensitive data can leave approved systems.
Expected state: Egress paths are known.
2. Enable monitoring before blocking to understand
Enable monitoring before blocking to understand real traffic.
Expected state: You see actual behavior first.
3. Review findings with data owners
Review findings with data owners to separate incidents from noise.
Expected state: Alerts are triaged with context.
4. Tune rules and block high-risk paths
Tune rules and block high-risk paths.
Expected state: Protection targets real risk.
Decision points
Block or monitor first?
- Monitor then block
- Block immediately
Monitor first to map legitimate flows; immediate blocking creates false outages and fatigue.
Encrypt or block egress?
- Block high-risk
- Encrypt everything
Block high-risk unapproved paths; encrypting everything is expensive and bypassed by screenshots.
Expected outcome
Sensitive data egress paths monitored and selectively blocked, with findings reviewed and rules tuned by owners.
Verification
Confirm a known test egress of sensitive data is detected and, on high-risk paths, blocked, while normal traffic is unaffected.
Cleanup
Record the findings, tuning decisions, and any confirmed incident handling.
Overview
Detect and limit sensitive data leaving approved systems through email, uploads, or code. Confirm a known test egress of sensitive data is detected and, on high-risk paths, blocked, while normal traffic is unaffected.
Steps
- Map the paths where sensitive data can leave approved systems. Expected state: Egress paths are known.
- Enable monitoring before blocking to understand real traffic. Expected state: You see actual behavior first.
- Review findings with data owners to separate incidents from noise. Expected state: Alerts are triaged with context.
- Tune rules and block high-risk paths. Expected state: Protection targets real risk.
# test egress attempt should be flagged/blocked
rg -i "BEGIN PRIVATE KEY" /tmp/export.txt && echo "sensitive pattern present"Verification
- Sensitive data egress paths monitored and selectively blocked, with findings reviewed and rules tuned by owners.
Decision points
- Block or monitor first? Options: Monitor then block; Block immediately. Recommended: Monitor first to map legitimate flows; immediate blocking creates false outages and fatigue.
- Encrypt or block egress? Options: Block high-risk; Encrypt everything. Recommended: Block high-risk unapproved paths; encrypting everything is expensive and bypassed by screenshots.