Enable UFW on Ubuntu Server while preserving SSH access
Enable UFW on Ubuntu Server while keeping SSH accessible, with verification and rollback steps.
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ubuntuTroubleshooting TLS 1.3 0-RTT Early Data Failures in OpenSSL
A diagnostic guide for troubleshooting TLS 1.3 0-RTT failures in OpenSSL, covering version checks, server configuration, and replay attack risks.
opensslSecuring Internal Services with SSH Local Port Forwarding
Learn to use SSH local port forwarding to securely reach internal services like private databases through an encrypted tunnel, without opening firewall ports to the internet.
sshConfigure NPS for 802.1X with AD Credentials: A Practical Guide
Learn how to configure Microsoft’s Network Policy Server (NPS) as a RADIUS server for 802.1X authentication using Active Directory credentials, with a step‑by‑step guide, example commands, troubleshooting tips, and common pitfalls to avoid.
npssDesigning a Minimal Zero‑Trust Access Layer with Cloudflare Access
A step‑by‑step architecture note for deploying Cloudflare Access as a minimal zero‑trust front‑end to an internal web app, covering requirements, config, trust boundaries, checks, and failure modes.
cloudflareConfiguring Explicit FTPS in FileZilla Server for Secure Transfers
Learn how to secure FileZilla Server using Explicit FTPS. This guide covers certificate configuration, passive port ranges, and firewall settings to prevent plaintext credential leaks.
filezillaDeploying Suricata IDS/IPS on pfSense: A Practical Guide for Small‑Office Networks
Learn how to enable, configure, verify, and troubleshoot Suricata on pfSense, including interface selection, rule set management, performance tuning, and recovery steps for a secure small‑office or home network.
Using PfSense Captive Portal for Simple Guest Wi‑Fi Access
Learn how to deploy PfSense’s captive portal for guest Wi‑Fi in a small office—step‑by‑step GUI configuration, a worked example, and the trade‑offs to consider.
Managing Network Access in CentOS with Firewalld Zones
Learn how to manage network traffic in CentOS using Firewalld zones, including the critical difference between runtime and permanent rules to prevent configuration loss.
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