Troubleshooting

How to Set Up RemoteApp on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Set Up RemoteApp on Windows Server 2016

How to Configure Windows Server 2016 RemoteApp RemoteApp is a feature of Windows Server 2016 Remote Desktop Services that allows individual applications to be published and delivered to remote users as seamlessly integrated windows on their local desktops. Unlike a full Remote Desktop session where the user sees an entire remote desktop, RemoteApp presents only […]

Read more
Debian 10 — apache2 — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — apache2 — multiple vulnerabilities (6 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 9 April 2021 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-9517 CVE-2019-10092 CVE-2020-1927 CVE-2020-35452 CVE-2021-34798 CVE-2021-44224 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

Read more
Debian 10 — roundcube — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — roundcube — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 9 April 2021 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-12625 CVE-2020-13964 CVE-2020-15562 CVE-2020-16145 CVE-2020-35730 CVE-2021-44025 CVE-2021-46144 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution […]

Read more
Arch Linux — libjcat — vulnerability — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — libjcat — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-202007-6 Related CVEs: CVE-2020-10759 Upstream summary: Type: insufficient validation. Status: Fixed. Affected: 0.1.2-1. Fixed in: 0.1.3-1. Group: AVG-1185. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis […]

Read more
How to Set Up ModSecurity WAF with Apache on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Set Up ModSecurity WAF with Apache on RHEL 7

How to Set Up ModSecurity WAF with Apache on RHEL 7 ModSecurity is the most widely deployed open-source Web Application Firewall (WAF), and it integrates natively with Apache as a dynamic module. When paired with the OWASP Core Rule Set (CRS), ModSecurity can detect and block a broad range of web attacks including SQL injection, […]

Read more
Oracle Linux 8 — openssl — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — openssl — security and stability fixes — required update (ELSA-2021-4424)

🟡 Medium   ⏱ 10–30 min  Last verified: 8 April 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-4424 Related CVEs: CVE-2021-23840 CVE-2021-23841 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

Read more
Common Problems 118521

Ubuntu 16.04 LTS – SSH login fails with Permission denied (publickey) – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 8 April 2021 Affected versions: Ubuntu 16.04 LTS 📖 ~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
AlmaLinux 8 — openslp — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — openslp — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2021:4295 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

Read more
Common Problems 115085

RHEL 8 rsyslog Forwarding Stops on TLS Handshake Errors

🟡 Medium   ⏱ 5–30 min  Last verified: 8 April 2021 📖 ~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 […]

Read more
AlmaLinux 8 — systemtap — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — systemtap — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2022:1890 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

Read more
CHAT