NetworkingDNSInfrastructureHow DNS Works — Complete Guide to Domain Name SystemLearn how DNS works step by step — from typing a URL to loading a website. Covers DNS records, resolution process, caching, DNS security, and troubleshooting. Beginner-friendly guide.March 17, 202616 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
CybersecurityNetworkingCiscoVulnerabilityCisco SD-WAN Manager CVE-2026-20128 & CVE-2026-20122 Under Active Exploitation — Patch ImmediatelyCisco confirms active exploitation of two more Catalyst SD-WAN Manager vulnerabilities. CVE-2026-20122 allows arbitrary file overwrite via API, CVE-2026-20128 leaks DCA credentials. Here's the full breakdown, exploit chain, and remediation steps.March 6, 20268 min read
CloudAWSCybersecurityNetworkingAWS UAE Data Center Hit by Objects, Fire Knocks Cloud Services Offline — What It Means for Cloud InfrastructureOn March 1, 2026, unidentified objects struck AWS's UAE data center causing fire and a major outage. The first time a major cloud provider has been knocked offline by military action. Here's the full timeline, impact, and lessons for cloud architects.March 3, 20265 min read
CybersecurityIoTSCADANetworkingICS/OT Vulnerabilities Hit Record in 2025: 2,155 Flaws Across PLCs, SCADA & Industrial SystemsThe Dragos OT Cybersecurity Report reveals 508 advisories covering 2,155 vulnerabilities in industrial control systems — the highest ever recorded. Three new threat groups now target critical infrastructure globally.March 3, 20267 min read
CybersecurityNetworkingCiscoComplianceCISA Emergency Directive: Federal Agencies Must Patch Cisco SD-WAN by Feb 27 — Full Compliance GuideCISA has ordered all federal agencies to patch Cisco SD-WAN systems by February 27, 2026. Here's the complete compliance checklist, detection steps, and what private sector organizations should do immediately.February 28, 20265 min read
SNMPCybersecurityNetwork MonitoringNetworkingThe SNMP Security Gap Nobody Wants to Admit: Why SNMPv3 Migration Can't Wait in 2026Most networks still run SNMPv1/v2c with community strings in plaintext. Learn why SNMP is the biggest unpatched security gap in 2026 and how to migrate to SNMPv3 with this practical step-by-step guide.February 28, 20267 min read
CybersecurityNetworkingCiscoVulnerabilityCVE-2026-20127: Critical Cisco SD-WAN Zero-Day Exploited Since 2023 — What You Need to Do NowCISA has issued Emergency Directive 26-03 for CVE-2026-20127, a CVSS 10.0 authentication bypass in Cisco Catalyst SD-WAN. Learn the vulnerability details, detection steps, and immediate remediation actions.February 26, 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