Barash Helvadzhaoglu
Senior Network Security Engineer — Munich
11+ years designing and securing enterprise networks across banking, manufacturing, and critical infrastructure. I write about real-world architecture decisions, vendor tradeoffs, and lessons learned in the field.
Recent Posts
What Is SD-WAN? A Practical Guide for Network Engineers
A comprehensive technical guide to SD-WAN: how it works, key components, traffic steering, and why enterprises …
802.11 Standards Deep Dive: WiFi 4, 5, 6, 6E and What Actually Changed
802.11 standards deep dive — what n, ac, ax, and be deliver in real deployments, OFDMA, MU-MIMO, BSS Coloring, …
WiFi Design for SMB, Hotels, and Medical Practices: Field Notes
WiFi design for SMBs, hotels, and medical practices — density planning, guest segmentation, PMS integration, …
WiFi Security: WPA3, 802.1X, Rogue AP Detection, and Site Survey
Enterprise WiFi security deep dive — WPA3 vs WPA2, 802.1X authentication, rogue AP detection and containment, …
Cisco DNA Center / Catalyst Center: When It Makes Sense and When It Doesn't
Honest assessment of Cisco DNA Center — deployment costs, setup complexity, ISE integration, and when smaller …
F5 WAF Deep Dive: Application Security with ASM and Advanced WAF
F5 WAF deep dive — ASM vs Advanced WAF, positive vs negative models, OWASP Top 10, bot defense, and phased …