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Network Design: Network Edge Design Part 2
Network Edge Design post, includes Active/Active, circuit, BGP, and other design considerations
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Sep 1325 min read
PSA: Traceroute - Safe and Effective to use
Public Service Announcement about the Traceroute tool used by network engineers.
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Jan 38 min read
Identify, Isolate, Repair - Network Troubleshooting Tales and Tips
Discussing network troubleshooting tips, stories, and insights including 2 troubleshooting scenarios
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Dec 31, 202325 min read
3 Firewall Protection Techniques to Enhance Network Defenses
Three solid protection techniques you can implement on your firewall to enhance network security.
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Apr 16, 202314 min read
Network Design: Dual ISP, DMZ, and the Network Edge
Detailed post about the network edge. Contains high and low level designs, considerations for Dual ISPs, and BGP guidance.
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Oct 31, 202227 min read
Enterprise Wireless Design - ENWLSD Cisco Certification Study Material
An overview of the material used to study and pass the Designing Cisco Enterprise Wireless Networks ENWLSD (300-425) Network Certification
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Jun 18, 20225 min read
Troubleshooting with Wireshark: The Case of the Gratuitous ARP
The story of a strange troubleshooting scenario where devices stop communicating inexplicably. Wireshark packet capture used for resolution.
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Jan 16, 202211 min read
The Biggest Single Point of Failure in Human History - a Cloud
Opinion: Could we be setting ourselves up for problems with cloud dependency? Analysis and opinion of IT architecture trends
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Oct 14, 202014 min read
Network Design Scenario #3: Remote Access VPN Design
Network Design covering Remote Access Client based VPNs aka SSL VPN
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Apr 26, 202016 min read
Troubleshooting with Wireshark: The Case of the TCP Challenge ACK
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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Nov 26, 201910 min read
Cisco IT Blog Award Finalist in "Best Analysis"
Network Defense Blog has become a finalist in the Cisco IT Blog Awards! Vote now!
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Nov 22, 20192 min read
5 Easy Router Protection Techniques - includes Attack and Packet Analysis
Executing attacks against a router using Kali Linux with Wireshark and the 5 easy steps to protect against them.
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Sep 24, 201914 min read
Network Design Scenario #2: DMZ Design
This scenario covers the network Demilitarized zone or DMZ. Network segmentation is key for network defense. This post will discuss various
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Mar 19, 20197 min read
Challenge Labs #2: Switching & Layer 2
These challenge labs cover layer 2 switching technology and protections Below I will showcase labs focused on switching which should...
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Jan 31, 20196 min read
Network Defense Against Perception - Updated
In this non-cyber network defense post we will discuss creating a network assessment document We've all heard it a million times - "The...
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Dec 18, 20184 min read
Network Design Scenario #1: Redundant OSPF Point-to-MultiPoint WAN
Network design Scenario 1 will cover an OSPF Point-to-Multipoint WAN. Includes multi-area OSPF stub area design and pros and cons.
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Oct 22, 20185 min read
Challenge Labs #1: CCNA/CCNP Labs
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...
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Sep 4, 20183 min read
How to Disable Password Recovery on Cisco Devices
This article covers how to disable password recovery for certain cisco routers and switches.
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Sep 2, 20183 min read
Knowledge is power - lots of links
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...
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Aug 31, 20183 min read
Hello World: Internet Plumbing & Data Conservation
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...
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Aug 29, 20183 min read
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