RailwayNetworkingTelecomIoTRailway Communication Networks — OFC, GSM-R, LTE-R & IP-MPLS for Indian RailwaysHow Indian Railways builds its communication backbone: Optical Fibre Cable (OFC), GSM-R, LTE-R, IP-MPLS, and VSAT networks. Architecture, deployment status, and migration to 5G.March 28, 20269 min read
NetworkingSubnettingInfrastructureIP Subnetting Explained — CIDR, VLSM, and IP Addressing Complete GuideMaster IP subnetting step by step — learn IPv4 addressing, subnet masks, CIDR notation, VLSM, and how to calculate network addresses, broadcast addresses, and usable hosts. Includes cheat sheet and worked examples.March 18, 202619 min read
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
GitAutomationDevOpsNetworkingHow to Download All Repositories from a Bitbucket Workspace at OnceNeed to clone every repo from your Bitbucket workspace? Here are 4 methods — from a simple Bash one-liner to Python scripts and GUI tools — to bulk clone all Bitbucket repositories in minutes.March 6, 20266 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
SNMPNetwork MonitoringNetworkingAutomationSNMP vs Network Observability: The Hybrid Monitoring Model Every Network Needs in 2026SNMP isn't dead, but it's not enough. Learn when to use SNMP polling, when to switch to streaming telemetry, and how to build a hybrid monitoring architecture that gives you complete network visibility.March 3, 20268 min read