security Archives

Deploying HashiCorp Vault on Kubernetes: Dynamic Secrets and Sidecar Injector Guide

October 19, 2026

Learn how to deploy HashiCorp Vault on Kubernetes using Helm. This guide walks through configuring Kubernetes authentication, issuing ephemeral PostgreSQL credentials, and injecting secrets using Vault Agent sidecars.

Linux

Mastering Linux PAM: Setting Up SSH 2FA/MFA and Server Login Policies

October 15, 2026

A practical guide to securing Linux logins with PAM. Learn how to combine SSH keys with Google Authenticator TOTP and enforce automated lockouts using pam_faillock.

Linux

Stop Linux Brute-Force Attacks with Fail2ban and Nftables

October 12, 2026

Harden your Linux servers against aggressive SSH brute-force scans. Learn how to configure Fail2ban with Nftables atomic sets for fast O(1) packet drops without CPU bottlenecks.

Build a Secure Code Sandbox for AI Agents with E2B and Python

October 10, 2026

Running AI-generated code directly on production servers is a recipe for middle-of-the-night cluster outages. Learn how to isolate execution using E2B MicroVMs and Python to keep your infrastructure safe from runaway processes.

Networking

Deploying DoH and DoT with CoreDNS on Linux: Secure Internal DNS Queries Against Eavesdropping

October 9, 2026

Secure your internal Linux network against snooping and spoofing. Learn how to deploy CoreDNS with DoH and DoT, enforce systemd capabilities, and configure upstream encryption.

Security

Deploy Authentik on Docker: Self-Hosted Identity Provider with SSO, MFA, and User Provisioning

October 9, 2026

Learn how to deploy Authentik on Docker Compose to build a robust, self-hosted Identity Provider. This guide covers step-by-step setup, OIDC and SAML app integration, dynamic MFA policies, and LDAP outpost configuration.

Linux

Mastering Linux Capabilities: Fine-Grained Process Permissions with getcap and setcap as a SUID Alternative

October 8, 2026

Linux Capabilities let you replace SUID with fine-grained privilege control — giving binaries only the specific permissions they need, nothing more. This guide covers getcap and setcap with practical examples for DevOps engineers managing production Linux servers.

Linux

Mastering Linux Security Auditing with Auditd: Rules, File Monitoring, and Log Analysis

October 3, 2026

Secure your Linux infrastructure using Auditd. This step-by-step guide explains writing persistent kernel rules, tracking file tampering, and analyzing logs with ausearch and aureport.

Security

Deploy HashiCorp Vault on Linux: Centralized Secrets and Automated Credential Rotation

October 3, 2026

Deploy HashiCorp Vault on Linux to eliminate secret sprawl. Learn how to install Vault, store encrypted secrets, and automate dynamic database credential rotation with short-lived leases.

DevOps

Deploying Trivy Operator on Kubernetes: Automated Vulnerability Scanning and CIS Compliance

October 2, 2026

CI/CD scanning cannot protect running pods when zero-day vulnerabilities emerge weeks after deployment. Learn how to install and configure Trivy Operator for continuous vulnerability scanning, configuration auditing, and automated CIS compliance.