Tracing a Layer 2 Path on Cisco Nexus Switches

Ever been stuck trying to figure out the exact switching path that packets take through your network? Me too. Here's how I … [Read more...]

Yes, We Really Need Dynamic ARP Inspection

Ettercap Host Scan

This is the second follow-up post to my my previous, "Do we really need Layer 2 Security?" article.  If you haven't read … [Read more...]

Yes, We Really Need Port-Security

This is a follow-up to my previous article "Do we really need Layer 2 Security?".  If you haven't read that one, probably … [Read more...]