Troubleshooting

How to Configure Web Application Proxy on Windows Server 2019 — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Configure Web Application Proxy on Windows Server 2019

How to Configure Web Application Proxy on Windows Server 2019 Web Application Proxy (WAP) is a reverse proxy role service in Remote Access on Windows Server 2019 that provides secure external access to applications hosted on internal servers. It acts as a pre-authentication gateway, validating user credentials via AD FS before forwarding requests to backend […]

Read more
How to Sync Time with Chrony on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Sync Time with Chrony on RHEL 8

Accurate system time is essential for security certificates, log correlation, scheduled jobs, and Kerberos authentication. RHEL 8 ships with Chrony as its default NTP implementation, replacing the older ntpd daemon. Chrony is faster to synchronize on startup, handles intermittent network connections well, and is better suited to virtual machines. This guide covers installing and configuring […]

Read more
openSUSE Tumbleweed — groff — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — groff — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2009-5044 CVE-2009-5080 CVE-2009-5081 Upstream summary: contrib/pdfmark/pdfroff.sh in GNU troff (aka groff) before 1.21 allows local users to overwrite arbitrary files via a symlink attack on […]

Read more
Common Problems 112962

Windows Server 2016 — DHCP scope exhaustion caused by stale reservations and delayed lease reclamation — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 23 December 2019 Affected versions: Windows Server 2016 📖 ~2 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 Configure Cloud-Init on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Configure Cloud-Init on IBM AIX 7.1

Introduction IBM AIX 7.1 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.1 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to configure cloud-init on ibm aix 7.1 on IBM AIX […]

Read more
How to Set Up Datadog Agent on SLES 12 — step-by-step SUSE Linux Enterprise 12 tutorial on Progressive Robot

How to Set Up Datadog Agent on SLES 12

Introduction This tutorial covers How to Set Up Datadog Agent on SLES 12 on SLES 12. SLES 12 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Prerequisites Ensure your SLES 12 system is up to date: zypper […]

Read more
FreeBSD 12 — php55-odbc — multiple vulnerabilities (12 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — php55-odbc — multiple vulnerabilities (12 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 23 December 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: php — multiple vulnerabilities Related CVEs: CVE-2015-8879 CVE-2016-5385 CVE-2016-5399 CVE-2016-6288 CVE-2016-6289 CVE-2016-6290 CVE-2016-6291 CVE-2016-6292  +4 more Upstream summary: PHP reports: Fixed bug #69975 (PHP segfaults when accessing nvarchar(max) defined columns) […]

Read more
FreeBSD 12 — linux-ibm-jdk — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — linux-ibm-jdk — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 23 December 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: jdk — jar directory traversal vulnerability Related CVEs: CVE-2004-1029 CVE-2005-1080 Upstream summary: Pluf has discovered a vulnerability in Sun Java JDK/SDK, which potentially can be exploited by malicious people to […]

Read more
FreeBSD 12 — exim-sa-exim — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — exim-sa-exim — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 23 December 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: exim — local privilege escalation Related CVEs: CVE-2005-0021 CVE-2005-0022 CVE-2011-0017 Upstream summary: exim.org reports: CVE-2011-0017 – check return value of setuid/setgid. This is a privilege escalation vulnerability whereby the Exim […]

Read more
How to Configure Fail2ban on SLES 12 — step-by-step SUSE Linux Enterprise 12 tutorial on Progressive Robot

How to Configure Fail2ban on SLES 12

Introduction This tutorial covers How to Configure Fail2ban on SLES 12 on SLES 12. SLES 12 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Step 1 — Install Fail2ban zypper install -y fail2ban Step 2 — Enable […]

Read more
CHAT