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Security

Security tutorial - IT technology blog
Posted inSecurity

OpenSCAP Guide for Linux: Automated Scanning and CIS Benchmark Remediation

Posted by By IT From Zero October 25, 2026
A comprehensive guide to using OpenSCAP for scanning, generating reports, and automatically remediating Linux configurations against CIS Benchmarks safely without service disruptions.
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Security tutorial - IT technology blog
Posted inSecurity

How to Use Bitnami Sealed Secrets on Kubernetes: Secure GitOps Secrets Management

Posted by By IT From Zero October 24, 2026
A comprehensive guide to deploying Bitnami Sealed Secrets on Kubernetes. Leverage asymmetric encryption to store secrets directly in Git safely and adhere to GitOps.
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Security tutorial - IT technology blog
Posted inSecurity

Configuring Port Knocking with Knockd on Linux: A Practical Guide to Stealth SSH

Posted by By IT From Zero October 20, 2026
Completely hide your SSH port from botnets and automated network scanners using Port Knocking. A step-by-step guide to configuring Knockd with Iptables and ~/.ssh/config on production Linux systems.
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Security tutorial - IT technology blog
Posted inSecurity

How to Install and Configure Suricata IDS/IPS on Linux: Real-Time Network Traffic Monitoring and Intrusion Prevention

Posted by By IT From Zero October 19, 2026
A detailed comparison of passive IDS and inline IPS architectures for Suricata on Linux. Learn how to configure Suricata with NFQUEUE, tune rulesets, and test real-time threat prevention.
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Security tutorial - IT technology blog
Posted inSecurity

Securing Redis Server on Linux: ACLs, TLS, and Preventing Unauthorized Access

Posted by By IT From Zero October 18, 2026
By default, Redis lacks strict security protections. This guide walks you through locking down port 6379, enforcing least-privilege access using ACLs, and configuring TLS encryption on Linux to prevent breaches and data theft.
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Security tutorial - IT technology blog
Posted inSecurity

How to Install and Configure Headscale: Self-Hosting a Tailscale Control Server for a Zero Trust VPN

Posted by By IT From Zero October 18, 2026
A comprehensive guide to self-hosting a Headscale control server to manage an independent Tailscale VPN, secure all metadata, and interconnect devices under Zero Trust.
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Security tutorial - IT technology blog
Posted inSecurity

Guide to Securing MySQL Server on Linux: TLS/SSL, Audit Plugin, and InnoDB Encryption

Posted by By IT From Zero October 16, 2026
A step-by-step guide to in-depth MySQL Server security on Linux: encrypting in-transit connections with TLS 1.3, securing data-at-rest with InnoDB Tablespace Encryption, and monitoring queries using Percona Audit Log.
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Security tutorial - IT technology blog
Posted inSecurity

How to Sign and Verify Docker Images with Sigstore Cosign: Neutralize Supply Chain Risks

Posted by By IT From Zero October 11, 2026
A practical guide to signing and verifying Docker images with Sigstore Cosign. Lock down your CI/CD pipeline and block rogue containers on production servers.
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Security tutorial - IT technology blog
Posted inSecurity

Securing MongoDB Server on Linux: Configuring RBAC, TLS, and Encryption at Rest

Posted by By IT From Zero October 9, 2026
Practical production security guide for MongoDB Server on Linux: configure RBAC with least privilege, enable TLS encryption in transit, and set up Encryption at Rest for disk security.
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Security tutorial - IT technology blog
Posted inSecurity

How to Install and Configure Fail2ban on Linux: Hands-On Defense Against SSH and Nginx Brute Force

Posted by By IT From Zero October 7, 2026
A step-by-step guide to installing and configuring Fail2ban on Linux to block SSH and Nginx brute-force attacks, with real-world unban tips and incremental ban rules for repeat offenders.
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