web server

How to Configure Nginx as a TCP/UDP Load Balancer on Debian 10 (ON-DEBIAN-10)

• April 16, 2020
• Linux
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Introduction Deploying configure nginx as a tcp/udp load balancer on debian 10 on a Debian 10 Buster machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. […]

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Ubuntu 14.04 LTS Apache returns 503 due to PHP-FPM issues

• April 13, 2020
• Linux
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🟠 High   ⏱ 5–30 min  Last verified: 13 April 2020 Affected versions: 14.04 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 & […]

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How to Configure Docker Networking on RHEL 8

• April 13, 2020
• Linux
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Docker networking determines how containers communicate with each other, with the host, and with external networks. RHEL 8 adds a layer of complexity because Docker writes its own iptables rules at startup, which can interact unexpectedly with firewalld — the default firewall manager on RHEL 8. Understanding Docker’s network drivers and how they map to […]

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How to Enable HTTP/2 in Nginx on FreeBSD 12

• April 12, 2020
• FreeBSD
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Introduction Deploying enable http/2 in nginx on freebsd 12 on a FreeBSD 12 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the standard […]

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Debian 10: Nginx cannot bind to port 80

• April 9, 2020
• Linux
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🟠 High   ⏱ 5–30 min  Last verified: 9 April 2020 Affected versions: Debian 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 & […]

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How to Secure Nginx with Let’s Encrypt on SLES 12

• April 7, 2020
• SUSE Linux Enterprise
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Introduction This tutorial covers How to Secure Nginx with Let’s Encrypt 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: […]

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How to Enable OCSP Stapling on Nginx on Debian 9

• April 7, 2020
• Linux
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Introduction This guide explains how to Enable OCSP Stapling on Nginx on Debian 9 on Debian 9 Stretch. Debian Stretch uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 9 install with […]

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How to Use Event Viewer on Windows Server 2012 R2

• April 6, 2020
• Tutorials
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How to Use Event Viewer on Windows Server 2012 R2 Event Viewer is the central log management console on Windows Server 2012 R2, providing access to the Windows event log system that records security events, system activities, application errors, and audit trail information. Every significant action on a Windows Server — user logins, service starts […]

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How to Install PHP on RHEL 7

• April 6, 2020
• Linux
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How to Install PHP on RHEL 7 PHP is the most widely used server-side scripting language for web development, powering applications ranging from simple contact forms to enterprise content management systems. Red Hat Enterprise Linux 7 ships with an older version of PHP in its base repositories, so for modern frameworks and security patches you […]

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How to Install Java and Configure JAVA_HOME on RHEL 7

• April 4, 2020
• Linux
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How to Install Java and Configure JAVA_HOME on RHEL 7 Java remains one of the most widely deployed application runtimes in enterprise environments, and RHEL 7 provides excellent support for running OpenJDK through its official repositories. Whether you are deploying a Spring Boot application, running Apache Tomcat, building microservices, or working with big data frameworks […]

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