Networking June 20, 2026
Inside a Firewall: How It Decides What Gets In and What Gets Dropped
From simple packet filtering to stateful inspection and next-gen deep packet analysis — how firewalls decide what gets in, what gets dropped, and why.
Networking February 11, 2026
Cisco ASAv Multi-DMZ Configuration and RIP Routing Architecture
A hands-on Cisco ASAv lab: stand up two isolated DMZ segments, publish a web server safely, contain the blast radius with security levels and ACLs, and run a RIPv2 routing architecture across the inside LAN — full config plus the tests that prove it works.
Networking February 10, 2026
Allowing ICMP Traffic Through the Cisco ASA Firewall
Why ping dies at the Cisco ASA — and how to fix it. Enabling ICMP inspection across a dual-EIGRP GNS3 lab, with the config and the verification tests.
Networking May 12, 2025
Hardening Your Home Network with a Next-Gen Firewall
A practical walkthrough for turning a basic home router setup into a segmented, defensible network using pfSense or OPNsense.