Security Archives - ITFROMZERO - Share tobe shared!

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

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.

Ubuntu

A Practical Guide to Configuring and Managing AppArmor on Ubuntu: Application Security and Isolation

By IT From Zero October 17, 2026

Comprehensive guide to configuring AppArmor on Ubuntu. Harden Nginx and MySQL, prevent privilege escalation, and isolate services with minimal resource overhead.

Fedora

Guide to systemd-cryptenroll and YubiKey on Fedora: Unlock LUKS2 with FIDO2

By IT From Zero October 15, 2026

Configure systemd-cryptenroll with a FIDO2 YubiKey on Fedora to unlock LUKS2 with a single touch, maintain a secure fallback, and resolve Dracut boot issues.

Ubuntu

How to Install and Configure ClamAV on Ubuntu Server: Automated Database Updates and Scheduled Malware Scans

By IT From Zero October 15, 2026

Detailed guide on installing ClamAV on Ubuntu Server, troubleshooting freshclam lock errors, scheduling automated webshell quarantine cron jobs, and optimizing RAM to avoid the OOM Killer.

Python

Guide to the Python Cryptography Library: AES, RSA Encryption, and Secure Key Management

By IT From Zero October 14, 2026

A practical guide to data encryption in Python with the cryptography library: Master AES-GCM, RSA-OAEP, SHA-256 hashing, and production-grade private key storage.

Security

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

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.

Git

Setting Up Gitleaks: Prevent API Key and Password Leaks from Git Hooks to CI/CD Pipelines

By IT From Zero October 11, 2026

A hands-on guide to configuring Gitleaks: Prevent leaked tokens, passwords, and API keys with Git pre-commit hooks and GitHub Actions CI/CD pipelines.

Ubuntu

Ubuntu Server Security Auditing with Lynis: Vulnerability Scanning and Practical Hardening

By IT From Zero October 10, 2026

A hands-on guide to installing Lynis on Ubuntu Server, analyzing Hardening Index reports, fixing common security flaws, and automating audits via cron.

Git

Keyless Git Commit Signing with Gitsign and Sigstore: Modern Identity Verification

By IT From Zero October 10, 2026

Sign Git commits without GPG keys using Gitsign and Sigstore. Learn how to configure keyless signing via GitHub or Google OIDC to protect repos from identity spoofing.

Docker

How to Configure User Namespace Remapping (userns-remap) in Docker

By IT From Zero October 10, 2026

Configuring userns-remap in Docker maps root containers to unprivileged users on the host, eliminating privilege escalation risks and securing your servers.