Enes Guven
High Availability (HA) in Core & VAS Networks
Field notes on configuring active-active firewall clusters and minimizing failover times for zero-downtime ISP core networks.
Read Log →Technical Logs
Field notes, architecture designs, and network defense strategies.
Logs: 11
Core Routing Diagnostics: BGP & OSPF in Enterprise Networks
Understanding internal routing with OSPF and external routing with BGP, including adjacency troubleshooting and redundant paths configuration.
Read Log →Enterprise Hybrid Cloud Architecture (Part 3): Resilience, Posture, SIEM & FinOps
Shifting focus from prevention to resilience. Exploring Azure Site Recovery, Defender Secure Score, Threat Hunting with Sentinel, and FinOps cost strategies.
Read Log →Enterprise Hybrid Cloud Architecture (Part 2): Identity, Zero Trust & Micro-segmentation
Bridging On-Premises AD with Entra ID, enforcing Principle of Least Privilege via Azure PIM, and building Hub-Spoke network isolation using NSG/ASG.
Read Log →Enterprise Hybrid Cloud Architecture (Part 1): Secure Transport & Edge Security
Designing resilient BGP transport highways with ExpressRoute & IPsec, optimizing MTU fragmentation, and fortifying the edge with Azure Front Door and WAF.
Read Log →Financial Sector Cybersecurity Architecture
Field notes on configuring active-active firewall clusters and minimizing failover times for zero-downtime financial core and VAS networks.
Read Log →Multi-Vendor SD-WAN Architecture: Challenges & Solutions
Lessons learned while designing, managing and troubleshooting multi-vendor SD-WAN architectures for distributed enterprise branch networks.
Read Log →Site-to-Site IPsec VPN: Troubleshooting Practices
Technical analysis of IKEv1/IKEv2 phases and troubleshooting persistent IPsec tunnel drops using packet capture (PCAP) methodologies.
Read Log →What is a Network? Part 3: OSI and TCP/IP Models
Understanding the universal rules of communication. A technical breakdown of the 7-layer OSI model versus the 4-layer TCP/IP reference stack.
Read Log →What is a Network? Part 2: IP, MAC, and Routing
Exploring how data packets find their addresses across the globe. A deep dive into Physical (MAC) vs. Logical (IP) addressing and basic routing.
Read Log →What is a Network? Part 1: Fundamentals and Classification
An introduction to network engineering fundamentals: Active vs. Passive infrastructure components, Ethernet standards, and LAN/WAN topology types.
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