DNS

Common Problems 120064

Debian 12 SSH Public Key Authentication Fails

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Debian 12 📖 ~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 & […]

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Common Problems 121579

Debian 9 SSH Public Key Authentication Fails

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 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 & […]

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Common Problems 115490

Time Drift Due to Stopped NTP Service

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 📖 ~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 & Cross-Refs References & Further […]

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Common Problems 119535

Debian 13 UFW Conflicts With nftables Policy

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Debian 13 📖 ~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 & […]

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Common Problems 114006

RHEL 10 systemd Service Hits Start-Limit and Stays Failed

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: RHEL 10.0 RHEL 10.1 📖 ~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 […]

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Common Problems 114496

Slow SSH Login on RHEL 9 Servers

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 📖 ~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 & Cross-Refs References & Further […]

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openSUSE Leap 15.6 — unbound — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Leap 15.6

openSUSE Leap 15.6 — unbound — multiple vulnerabilities (6 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Leap 15.6 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2024:1923-1 (see also SUSE bugzilla) Related CVEs: CVE-2022-3204 CVE-2025-11411 CVE-2024-8508 CVE-2022-30698 CVE-2022-30699 CVE-2024-43167 Upstream summary: A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in various DNS resolving software. […]

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Alpine Linux 3.19 — pdns — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux 3.19

Alpine Linux 3.19 — pdns — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.19 / fixed in 4.6.1-r0 📖 ~4 min read  •  Source: Alpine secdb entry — pdns 4.6.1-r0 Related CVEs: CVE-2022-27227 CVE-2021-36754 CVE-2020-17482 CVE-2019-3871 CVE-2018-10851 CVE-2018-14626 CVE-2019-10203 CVE-2019-10162  +2 more Upstream summary: Alpine community repository for vv3.19 ships pdns 4.6.1-r0 which […]

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Alpine Linux 3.19 — pdns-recursor — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux 3.19

Alpine Linux 3.19 — pdns-recursor — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.19 / fixed in 4.9.5-r0 📖 ~4 min read  •  Source: Alpine secdb entry — pdns-recursor 4.9.5-r0 Related CVEs: CVE-2024-25583 CVE-2023-50387 CVE-2023-50868 CVE-2023-22617 CVE-2022-37428 CVE-2022-27227 CVE-2020-25829 CVE-2020-14196  +12 more Upstream summary: Alpine community repository for vv3.19 ships pdns-recursor 4.9.5-r0 which […]

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Amazon Linux 2023 — bind — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2023

Amazon Linux 2023 — bind — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2023 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2023-2026-1533 Related CVEs: CVE-2026-1519 CVE-2025-40778 CVE-2025-40780 CVE-2025-8677 CVE-2025-40777 CVE-2024-11187 CVE-2024-12705 CVE-2024-1737  +12 more Upstream summary: If a BIND resolver is performing DNSSEC validation and encounters a maliciously crafted zone, the […]

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