SysAdminNetworkingSecurityLinuxFree SSL with Let's Encrypt and Caddy: Complete Setup Guide for Self-Hosted AppsSet up automatic HTTPS for your self-hosted apps using Caddy and Let's Encrypt — zero manual certificate management. Covers reverse proxy, wildcard certs, internal networks, and real production configs.June 23, 202611 min read
SecurityNetworkingWebHow HTTPS & SSL/TLS Work — Complete Beginner GuideUnderstand how HTTPS, SSL, and TLS secure your internet connection. Learn the TLS handshake, certificates, encryption types, and how to check SSL status. Beginner-friendly with diagrams.March 17, 202617 min read
NetworkingInfrastructureSecurityVLAN vs Subnet — What's the Difference and When to Use EachUnderstand the key differences between VLANs and subnets. Learn how they work, when to use each, and how they work together in real network designs. Practical examples included.March 17, 202613 min read
NetworkingLinuxDevOpsSecurityHow to Set Up a Reverse Proxy with Nginx for Self-Hosted AppsStep-by-step guide to configuring Nginx as a reverse proxy for self-hosted applications like Grafana, Portainer, and Nextcloud — with SSL, load balancing, and security hardening.March 7, 20268 min read
NetworkingSecurityLinuxDevOpsSSH Tunneling & Port Forwarding: The Complete GuideMaster SSH tunneling with practical examples — local port forwarding, remote port forwarding, dynamic SOCKS proxy, and jump hosts. Access any service securely without a VPN.March 7, 20268 min read
CybersecurityLinuxSystem AdministrationSecurityLinux Server Hardening Checklist 2026: A Complete Security GuideA practical, step-by-step Linux server hardening guide covering SSH lockdown, firewall rules, kernel tuning, audit logging, automatic patching, and CIS benchmark alignment for Ubuntu and RHEL.February 26, 20267 min read
SNMPNetworkingSecurityNMSOpen SourceSNMPv3 Secure Configuration and Testing with Open-Source ToolsA complete guide to configuring SNMPv3 with authentication and encryption — on network devices, Linux servers, and testing with open-source tools like Net-SNMP, Zabbix, and LibreNMS.February 19, 20267 min read
SecurityOWASPWeb DevelopmentDevOpsOWASP Top 25 Web Security Vulnerabilities — A Visual Guide for 2026A comprehensive, visual breakdown of the most critical web application security risks. Learn what each vulnerability is, how attackers exploit it, and how to defend against it.February 18, 202610 min read
SysAdminSecurityMicrosoft 365 Admin Center — Management, Security, and Best PracticesA practical guide to managing Microsoft 365 through the Admin Center — user management, license assignment, security configuration, Exchange, and Teams administration.February 16, 20266 min read
SecurityOpen SourceSysAdminOpenVAS Vulnerability Assessment — Setup, Scanning, and ReportingHow to deploy and use OpenVAS (Greenbone Vulnerability Management) for automated vulnerability scanning — installation, scan configuration, result analysis, and remediation.February 13, 20267 min read
SecurityNetworkingOpen SourceNMAP Network Scanning — Host Discovery, Port Scanning, and Security AuditingA practical guide to using NMAP for network discovery, port scanning, service detection, and security auditing — from basic scans to advanced scripting.February 12, 20266 min read
NetworkingSecurityOpen SourceWireshark Packet Analysis — Capturing, Filtering, and Network TroubleshootingA practical guide to using Wireshark for network packet capture and analysis — from basic capturing to advanced filters, protocol analysis, and real-world troubleshooting scenarios.February 10, 20266 min read
NetworkingIoTSysAdminSecurityAccessing Remote Devices Without a Public IP — Tunneling, Reverse Proxy, and CGNAT SolutionsHow to reach IoT devices, servers, and equipment behind NAT or CGNAT without a public IP address — using reverse tunnels, VPN, and cloud relay services.February 2, 20266 min read
NetworkingSecuritySysAdminHow to Use L2 VPN — Site-to-Site Layer 2 Connectivity GuideA practical guide to Layer 2 VPN technologies — VPLS, EVPN, L2TP, and pseudowires — for extending LANs across geographically distributed sites.January 31, 20266 min read
SecurityNetworkingSysAdminIntrusion Prevention System (IPS) — Setup, Configuration, and Best PracticesA practical guide to deploying and configuring an Intrusion Prevention System for network security — from architecture to rule tuning and open-source options.January 23, 20266 min read