DNS

Common Problems 114125

RHEL 10 – PAM faillock locks service accounts after automation retries

🟠 High   ⏱ 5–30 min  Last verified: 24 November 2025 Affected versions: RHEL 10 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 & […]

Read more
Debian 13 — unbound — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — unbound — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 23 November 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2009-3602 CVE-2009-4008 CVE-2010-0969 CVE-2011-1922 CVE-2011-4528 CVE-2011-4869 CVE-2014-8602 CVE-2017-15105  +12 more Upstream summary: Unbound before 1.3.4 does not properly verify signatures for NSEC3 records, which allows remote attackers to […]

Read more
How to Set Up a VPN Server with StrongSwan IPsec on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Set Up a VPN Server with StrongSwan IPsec on RHEL 9

IPsec VPNs provide strong, standards-based encryption and are natively supported by Windows, macOS, and iOS without additional client software. StrongSwan is a full-featured IKEv2/IPsec implementation that runs well on RHEL 9. This tutorial walks you through installing StrongSwan, generating a PKI certificate chain, and configuring an IKEv2 VPN server that accepts connections from native OS […]

Read more
Alpine Linux 3.20 — knot-resolver — multiple vulnerabilities (8 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux 3.20

Alpine Linux 3.20 — knot-resolver — multiple vulnerabilities (8 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.20 / fixed in 5.7.1-r0 📖 ~4 min read  •  Source: Alpine secdb entry — knot-resolver 5.7.1-r0 Related CVEs: CVE-2023-50387 CVE-2023-50868 CVE-2022-40188 CVE-2020-12667 CVE-2019-19331 CVE-2019-10190 CVE-2019-10191 CVE-2018-1110 Upstream summary: Alpine community repository for vv3.20 ships knot-resolver 5.7.1-r0 which addresses CVE-2023-50387. […]

Read more
How to Install Memcached on Oracle Linux 10 — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Install Memcached on Oracle Linux 10

Introduction Setting up install memcached on oracle linux 10 on a Oracle Linux 10 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Install Memcached on Oracle Linux 10, with all the commands you need, the SELinux and firewalld considerations to keep in mind, and […]

Read more
Common Problems 113951

RHEL 10 – SELinux AVC denials after package update break service startup – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 21 November 2025 Affected versions: RHEL 10 📖 ~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 & […]

Read more
Common Problems 114023

RHEL 10 – nftables rules overwritten by legacy iptables service – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 20 November 2025 Affected versions: RHEL 10 📖 ~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 & […]

Read more
How to Install Apache Cassandra on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Install Apache Cassandra on RHEL 10

Introduction This tutorial demonstrates how to Install Apache Cassandra on RHEL 10 on RHEL 10. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered RHEL 10 system with the default AppStream repositories enabled. […]

Read more
Common Problems 114029

RHEL 10 – chronyd fails to synchronize time and clock drift grows – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 18 November 2025 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 […]

Read more
Common Problems 114026

RHEL 10 Cockpit Web Console Unreachable After Hardening

🟡 Medium   ⏱ 5–30 min  Last verified: 17 November 2025 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 […]

Read more
CHAT