Firewall

How to Set Up BGP Routing with BIRD on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Set Up BGP Routing with BIRD on Debian 10

Introduction This guide explains how to Set Up BGP Routing with BIRD on Debian 10 on Debian 10 Buster. Debian Buster 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 10 install […]

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How to Install Jaeger for Distributed Tracing on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install Jaeger for Distributed Tracing on RHEL 7

How to Install Jaeger for Distributed Tracing on RHEL 7 As systems evolve from monoliths to microservices, understanding the path of a single request across dozens of services becomes increasingly difficult using traditional logs and metrics alone. Jaeger is an open-source distributed tracing platform originally developed by Uber Technologies and now hosted by the Cloud […]

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How to Configure Kubernetes RBAC on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Configure Kubernetes RBAC on FreeBSD 12

Introduction How to Configure Kubernetes RBAC on FreeBSD 12 is a core administration task for any FreeBSD 12 server operator. FreeBSD 12 ships with the 15.0-RELEASE kernel, ZFS as the default root filesystem, Capsicum capability sandboxing improvements, and an updated ports tree. Unlike Linux distributions, FreeBSD uses rc(8) for service management, pf for packet filtering, […]

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How to Set Up SSH Key Authentication on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Set Up SSH Key Authentication on FreeBSD 12

Introduction This guide explains how to Set Up SSH Key Authentication on FreeBSD 12 on FreeBSD 12. FreeBSD uses the pkg(8) binary package manager, rc.conf(5) for service startup configuration, and pf(4) as its primary packet filter. There is no SELinux or AppArmor — instead, FreeBSD provides the MAC (Mandatory Access Control) framework and Capsicum for […]

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How to Configure Nginx as a TCP/UDP Load Balancer on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure Nginx as a TCP/UDP Load Balancer on Debian 9 (DEBIAN-9-2)

Introduction Debian 9 Stretch is built around the ethos of stability and free software. Setting up configure nginx as a tcp/udp load balancer on debian 9 on Stretch leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Stretch freeze. Follow each […]

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How to Set Up Windows Server 2019 SMB over QUIC — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Set Up Windows Server 2019 SMB over QUIC

How to Set Up Windows Server 2019 SMB over QUIC SMB over QUIC is a feature introduced in Windows Server 2022 that allows SMB 3 file sharing over the QUIC transport protocol (UDP port 443) instead of TCP port 445. While Windows Server 2019 itself does not support the SMB over QUIC server role, Windows […]

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Common Problems 114924

RHEL 8 firewalld Blocking Application Port Access

🟡 Medium   ⏱ 5–30 min  Last verified: 9 January 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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How to Use NIS+ on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Use NIS+ on IBM AIX 7.2

Introduction IBM AIX 7.2 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 7.2 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to use nis+ on ibm aix 7.2 on IBM AIX […]

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How to Configure Prometheus Node Exporter on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Configure Prometheus Node Exporter on FreeBSD 12

Introduction This guide explains how to Configure Prometheus Node Exporter on FreeBSD 12 on FreeBSD 12. FreeBSD uses the pkg(8) binary package manager, rc.conf(5) for service startup configuration, and pf(4) as its primary packet filter. There is no SELinux or AppArmor — instead, FreeBSD provides the MAC (Mandatory Access Control) framework and Capsicum for fine-grained […]

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How to Configure Logstash on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure Logstash on Debian 9

Introduction Deploying configure logstash on debian 9 on a Debian 9 Stretch 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. Prerequisites Ensure Debian 9 Stretch […]

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