DNS

Common Problems 114609

FIPS Mode Enablement Causes Boot Or Crypto Failures

🟡 Medium   ⏱ 5–30 min  Last verified: 4 April 2024 📖 ~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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NetBSD 10.0 — bind-9.2.0* — vulnerability — patch and remediation guide — diagnosis and fix on NetBSD 10.0

NetBSD 10.0 — bind — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: NetBSD 10.0 📖 ~4 min read  •  Source: pkgsrc audit-packages entry Upstream summary: pkgsrc audit-packages flagged bind for vulnerability class 'denial-of-service'. Reference: http://www.cert.org/advisories/CA-2002-15.html Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary […]

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Common Problems 114454

firewalld Blocks Required Application Port

🟡 Medium   ⏱ 5–30 min  Last verified: 31 March 2024 📖 ~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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Debian 12 — dnsjava — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — dnsjava — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 31 March 2024 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2023-50387 CVE-2023-50868 CVE-2024-25638 Upstream summary: Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial […]

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How to Use Docker Volumes and Bind Mounts on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Use Docker Volumes and Bind Mounts on RHEL 9

Docker containers are ephemeral by default — all data written inside a container is lost when the container is removed. Docker provides two mechanisms for persisting data and sharing files between containers and the host: volumes (managed by Docker, stored in /var/lib/docker/volumes/) and bind mounts (map a host directory directly into a container). Volumes are […]

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Oracle Linux 9 — bind — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — bind — vulnerability — patch and remediation guide (ELSA-2023-4099)

🟠 High   ⏱ 15–60 min  Last verified: 23 March 2024 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-4099 Related CVEs: CVE-2023-2828 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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How to Install and Use Podman with systemd Socket Activation on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Install and Use Podman with systemd Socket Activation on RHEL 9

Podman is RHEL 9’s default container engine and, unlike Docker, runs entirely rootless and integrates natively with systemd. Socket activation is a systemd feature that lets the kernel hold a listening socket open while the service is stopped; the moment the first connection arrives, systemd starts the corresponding service and hands the socket over. This […]

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AlmaLinux 9 — aardvark-dns — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 9

AlmaLinux 9 — aardvark-dns — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 9 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2025:7094 Related CVEs: CVE-2024-8418 Upstream summary: Authoritative DNS server for A/AAAA container records Forwards other request to configured resolvers. Read more about configuration in `src/backend/mod.rs`. Security Fix(es): * containers/aardvark-dns: TCP Query Handling […]

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Common Problems 114602

SELinux Boolean Not Persisting Across Reboot

🟡 Medium   ⏱ 5–30 min  Last verified: 19 March 2024 📖 ~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 122562

freebsd-update Install Leaves Kernel and World Mismatch

🔴 Critical   ⏱ 5–30 min  Last verified: 16 March 2024 Affected versions: FreeBSD 14 📖 ~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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