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
IT Security Obligations for Small Businesses in Bavaria — and How Digitalbonus Bayern Covers Up to 50% of the Costs
Which IT security measures are legally required in Bavaria? Firewall, network separation, email protection, …
Enterprise WiFi Controller Architecture: Cisco and Aruba WLAN Design
Enterprise wireless controller deep dive — Cisco WLC vs DNA Center, Aruba vs Central, centralized vs …
F5 GTM & GSLB Deep Dive: Global Traffic Management and DNS Failover
F5 GTM (BIG-IP DNS) deep dive — Wide IPs, iQuery, topology routing, TTL strategy, multi-DC failover, and …
SecureCRT and SuperPutty: Terminal Tools Every Network Engineer Should Know
Field guide to SecureCRT and SuperPutty — session logging, portability, credential management, scripting, and …
Enterprise Collaboration Infrastructure: From IP Phones to the Cloud Era
Enterprise collaboration evolution — from Cisco CUCM and on-premise telephony to cloud-native Webex, Teams, …
F5 LTM Deep Dive: Virtual Servers, iRules, SSL Offloading & HA
F5 BIG-IP LTM deep dive — full-proxy architecture, virtual servers, iRules, SSL offloading, and a …