Monthly Archives: July 2012

The Truth About “Security by Obscurity”

Anyone who’s been in the security field for a significant time has heard the saying “Security by obscurity is no security at all”. I have heard this statement in many contexts. One regular place it is used is in the … Continue reading

Posted in Rant, Security, Technology | Tagged , | 2 Comments

VRFing 103, Using NAT Virtual Interfaces for Global Reachability

The last few technical articles I’ve written have been around the topic of VRFs. VRF, short for Virtual Routing an Forwarding, is basically a way to carve out areas of isolation in your router. The way this is accomplished is … Continue reading

Posted in Network, Technology | Tagged , , , | 12 Comments

IINS Upgrade, Examining the CCNA Security Blueprint Delta

For those preparing for their CCNA Security, there is a change coming this Fall. September 30, 2012 is the last day to take the current version of IINS (Implementing IOS Network Security). Those taking the exam after October 1st will … Continue reading

Posted in Career, CCNA Security, Certification, Security, Technology | Tagged , , | 1 Comment

VRFing 102, Providing Internet Access With Dynamic PAT

Last week I wrote an article called VRFing 101, Understanding VRF Basics. This was a short and simple introduction into a technology that provides tremendous flexibility for network designers. With flexibility, complexity always follows. This is true in the case … Continue reading

Posted in Network, Technology | Tagged , , , , | 6 Comments

Anyone Have an ACS 5 Lab? Wanna Blog?

First, I want to say thanks to those who regularly reached out to me with suggestions. About a week and a half ago I asked, “How Can PacketU Help You?” The suggestions ranged from EAP and ACS 5, AAA, advanced … Continue reading

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VRFing 101, Understing VRF Basics

When most engineers think about VRF, they think about MPLS. VRF, short for Virtual Routing and Forwarding, is one of the features that enable designers to create flexible MPLS network designs. However we are going going to completely forget about … Continue reading

Posted in Network, Technology | Tagged , , | 52 Comments

Point versus Integrated Solutions–Understanding the Cost

A couple of weeks ago, someone posted a question on the Cisco Learning Network. This question was, “What is the opposite of a ‘point’ solution”. I answered that “integrated solution” would probably be the most likely choice of words as … Continue reading

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How Can PacketU Help You?

I wanted to take the opportunity to ask PacketU readers what types of articles they enjoy the most and what types of articles they’d like to see in the future. Site statistics indicate that the site popularity has basically doubled … Continue reading

Posted in Career, Technology | Tagged | 1 Comment

Using Route Based VPNs to Make Hairpinning More Logical

Last week we looked at the challenges of combining VPN and NAT on the same device while hairpinning VPN traffic back out to the Internet. That created some interesting challenges with NAT that required some duct tape and band-aids to … Continue reading

Posted in Network, Security, Technology | Tagged , , , | 13 Comments