Logging Monitoring

How to Install and Configure Fail2ban on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Install and Configure Fail2ban on Debian 10

Introduction Debian 10 Buster is built around the ethos of stability and free software. Setting up install and configure fail2ban on debian 10 on Buster leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Buster freeze. Follow each step carefully and […]

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Arch Linux — mruby — vulnerability — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — mruby — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-202107-10 Related CVEs: CVE-2020-36401 Upstream summary: Type: arbitrary code execution. Status: Fixed. Affected: 2.1.2-1. Fixed in: 3.0.0-1. Group: AVG-2116. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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Ubuntu 14.04 — patch — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 14.04

Ubuntu 14.04 — patch — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 11 April 2020 Affected versions: Ubuntu 14.04 (trusty) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4071-2 Related CVEs: CVE-2019-13636 CVE-2019-13638 CVE-2016-10713 CVE-2018-1000156 CVE-2018-6951 CVE-2010-4651 CVE-2014-9637 CVE-2015-1196  +2 more Upstream summary: USN-4071-1 fixed several vulnerabilities in Patch. This update provides the corresponding update for Ubuntu 14.04 […]

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Ubuntu 16.04 — cron — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — cron — multiple vulnerabilities (6 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 11 April 2020 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5259-3 Related CVEs: https://ubuntu.com/security/notices/USN-5259-2 https://launchpad.net/bugs/1971895 CVE-2017-9525 CVE-2019-9704 CVE-2019-9705 CVE-2019-9706 Upstream summary: USN-5259-1 and USN-5259-2 fixed vulnerabilities in Cron. Unfortunately that update was incomplete and could introduce a regression. This update […]

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Oracle Linux 8 — sqlite — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — sqlite — vulnerability — patch and remediation guide (ELSA-2021-1581)

🟡 Medium   ⏱ 10–30 min  Last verified: 11 April 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-1581 Related CVEs: CVE-2020-13434 CVE-2020-15358 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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How to Configure Remote Access VPN with SSTP on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Configure Remote Access VPN with SSTP on Windows Server 2012 R2

How to Configure Remote Access VPN with SSTP on Windows Server 2012 R2 Secure Socket Tunneling Protocol (SSTP) is a VPN tunneling protocol developed by Microsoft that encapsulates Point-to-Point Protocol (PPP) traffic over HTTPS (SSL/TLS on port 443). Because SSTP uses port 443, it traverses most firewalls and web proxies without requiring special port forwarding […]

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Oracle Linux 8 — GraalVM — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — GraalVM — vulnerability — patch and remediation guide (ELSA-2023-12676)

🟠 High   ⏱ 15–60 min  Last verified: 11 April 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-12676 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 […]

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Debian 10 — libreoffice — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — libreoffice — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 11 April 2020 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-9848 CVE-2019-9850 CVE-2019-9854 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification […]

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Common Problems 115131

firewalld Blocking Required Application Port – RHEL 8 Post 029

🟡 Medium   ⏱ 5–30 min  Last verified: 10 April 2020 📖 ~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 Tumbleweed — mipv6d — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — mipv6d — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory SUSE-SR:2010:019 (see also SUSE bugzilla) Related CVEs: CVE-2010-2522 CVE-2010-2523 Upstream summary: The mipv6 daemon in UMIP 0.4 does not verify that netlink messages originated in the kernel, which allows local users to […]

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