Debian 9 – nftables Rules Missing After Reboot – Persistent Firewall Setup
🟠 High ⏱ 5–30 min Last verified: 6 December 2021 Affected versions: Debian 9 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & […]