Public Service Announcement about the Traceroute tool used by network engineers.

Discussing network troubleshooting tips, stories, and insights including 2 troubleshooting scenarios

Three solid protection techniques you can implement on your firewall to enhance network security.

Detailed post about the network edge. Contains high and low level designs, considerations for Dual ISPs, and BGP guidance.

An overview of the material used to study and pass the Designing Cisco Enterprise Wireless Networks ENWLSD (300-425) Network Certification

The story of a strange troubleshooting scenario where devices stop communicating inexplicably. Wireshark packet capture used for resolution.

Opinion: Could we be setting ourselves up for problems with cloud dependency? Analysis and opinion of IT architecture trends

Network Design covering Remote Access Client based VPNs aka SSL VPN

Troubleshooting an issue where the server replies with an ACK only instead of SYN/ACK. Also I will show a few simple Wireshark tips.

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Executing attacks against a router using Kali Linux with Wireshark and the 5 easy steps to protect against them.

This scenario covers the network Demilitarized zone or DMZ. Network segmentation is key for network defense. This post will discuss various

These challenge labs cover layer 2 switching technology and protections Below I will showcase labs focused on switching which should give...

In this non-cyber network defense post we will discuss creating a network assessment document We've all heard it a million times - "The...

Network design Scenario 1 will cover an OSPF Point-to-Multipoint WAN. Includes multi-area OSPF stub area design and pros and cons.

This post contains some challenge labs to help with CCNA/CCNP or networking studying. Below I will showcase 2 labs I have used in the...

This article covers how to disable password recovery for certain cisco routers and switches.

Here is a large list of technology links I have bookmarked over time. "Give a man a fish, and you feed him for a day. Teach a man to...

This is a quick introduction to my new "Network Defense Blog" Welcome So I decided to start a blog. It seems so cliche when i think about...