Category Archive: Real World

Apps for a Network Engineer Part II: Windows

Windows for Network Engineers Part two in my series of apps for network engineers across the three major platforms. I previously did the post for Mac when I first refreshed my laptop and purchased my first new Mac in 8 years. Issued by work, my daily laptop is a Windows machine which is fine with …

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Permanent link to this article: http://www.packetpilot.com/apps-for-a-network-engineer-part-ii-windows/

Linux to Cisco Openswan IPSec Configuration

[notice]For this example I use the following IP scheme    192.168.0.12|–O–42.42.42.42—–[INTERNET]——12.12.12.12–O–|10.42.42.42[/notice] I was approached a few weeks back to assist in creating a VPN Tunnel between two end points. Of course in my naivety I readily assumed it was between to Cisco devices but that turned out not to be the case. The tunnel was …

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Permanent link to this article: http://www.packetpilot.com/linux-to-cisco-openswan-ipsec-configuration/

Trouble shoot with TDR

This article is another example of trouble shooting by putting multiple pieces together. While it relies upon existing knowledge of the environment in which the article is based it should prove to be a good example of a trouble shooting process that will hopefully be able to spark some creative thinking the next time you …

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Permanent link to this article: http://www.packetpilot.com/trouble-shoot-with-tdr/

It’s not defeat unless you quit.

Too often when talking to individuals studying for certifications tests, or just entering their field, I find them to quick to throw their hands up and say “I don’t know, it’s to far beyond me” and that is where their interest stops. They keyword I am saying their is stops. While yes, I am going …

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Permanent link to this article: http://www.packetpilot.com/its-not-defeat-unless-you-quit/

Apps for a Network Engineer Part 1: MAC

MAC for Network Engineers I am not going to play bias in anyway towards any particular apps. I’m surely not going to get into the debate between Windows or Apple as a primary computer. In fact, I’ve spent the last 4 years using Windows exclusively for work due to work issued laptops and the lack …

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Permanent link to this article: http://www.packetpilot.com/apps-for-a-network-engineer-part-1-mac/

SRT: Offline type 7 decrypt

I was recently working on deploying a new device into our network infrastructure. I was working off a configuration template that had a standard arguments for AAA leveraging TACACS+. I was offsite and had asked a fellow colleague to enter the new device into our ACS deployment to allow authentication and command authorization. The long …

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Permanent link to this article: http://www.packetpilot.com/srt-offline-type-7-decrypt/

Tracked Static Default Route

As common place in today’s networks redundancy is key. Applications are the key components to business obtaining revenue. More and more applications are becoming SaaS and ecommerce is here to stay. With that being said, many companies are moving to redundant connections to the internet. These connections could be through two different ISPs, or both …

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Permanent link to this article: http://www.packetpilot.com/tracked-static-default-route/

Overlapped IP Range in a Merger

The Scenario is this…Company A has purchased Company B. One is an enterprise of thousands of users, the other a mid size company in the multiple hundres. However, as would happen to be the case, both companies utilize an overlapping subnet. To further complicate the issue it has been decided that both companies need to …

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Permanent link to this article: http://www.packetpilot.com/overlapped-ip-range-in-a-merger/

Router on a Stick

The scenario looks like this. You’ve got a branch office with a single router connecting to your corporate office over the WAN. In your branch office you have a single layer 2 switch and a desire to separate traffic into multiple broadcast domains. Maybe you want an easy way to allow only HR computers to …

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Permanent link to this article: http://www.packetpilot.com/router-on-a-stick/

Cisco DHCP Configuration

Cisco routers are capable of doing many more things than simply routing packets. In fact, it can operate as a small DHCP server when needed. By no means is it a replacement for your enterprise, centrally managed DHCP server but it does have its applicable scenarios. Lets say you have a branch office that has …

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Permanent link to this article: http://www.packetpilot.com/cisco-dhcp-configuration/

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