Ubuntu 14.04 LTS – UFW rules disappear after reboot – Fix & Prevention

📖 ~1 min read

Table of contents

1. Symptom & Impact
2. Environment & Reproduction
3. Root Cause Analysis
4. Quick Triage
5. Step-by-Step Diagnosis
6. Solution – Primary Fix
7. Solution – Alternative Approaches
8. Verification & Acceptance Criteria
9. Rollback Plan
10. Prevention & Hardening
11. Related Errors & Cross-Refs
12. References & Further Reading

Symptom & Impact

Expected firewall protections are absent after host restart.

Environment & Reproduction

Seen after manual iptables edits or conflicting startup scripts.

Root Cause Analysis

UFW rule state is overridden or not loaded during boot.

Quick Triage

Compare active rules to baseline and inspect firewall service state.

Step-by-Step Diagnosis

Review UFW configs, boot logs, and competing firewall automation.

Solution – Primary Fix

Rebuild UFW policy, enable persistence, and remove conflicting startup rules.

Solution – Alternative Approaches

Manage firewall centrally via configuration management for consistency.

Verification & Acceptance Criteria

Rule set persists identically across multiple reboot cycles.

Rollback Plan

Reapply previously exported rule set if policy causes access loss.

Prevention & Hardening

Track firewall drift and enforce boot-time policy validation.

Related Errors & Cross-Refs

Can coincide with SSH access interruptions and service exposure events.

Related tutorial: View the step-by-step tutorial for Ubuntu 14.04 LTS.

View all Ubuntu 14.04 LTS tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

UFW persistence and iptables integration references.