Raspberry Pi – Getting ready to capture with Wireshark and SharkTap

As a part of my Raspberry Pi series, I have been looking for an easy way to start showing packet captures as a part of some of what I have been doing in my other posts in the series. In doing some search for an option for an affordable easy to use tap best suited for the Raspberry Pi. I found a device by the name of SharkTap from midBit Technologies, LLC. For $70, it is ideally suited for learning how to do capture captures and an ethernet tap at the same time.
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Raspberry Pi – Radius (Part 1)

Version used – 2013-09-25-wheezy-raspbian

Having a test radius server is handy when you are trying to troubleshoot an existing radius implementation or you want to get experience with it while studying for a certification exam.

The process get started with these two commands -

sudo apt-get update
sudo apt-get install freeradius

The first thing that you will want to do is create a user to authenticate with. You will do this using this command – sudo nano /etc/freeradius/users.

Here is the username that I created to start with – cisco Cleartext-Password := “cisco123″.
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2 Factor Authentication – Google Authenticator

I had used 2 factor authentication on my eBay and PayPal accounts for several years. I had even moved to using a soft token when I got my first iPhone. With the recent rash of system attacks I had been hearing about finally got me to do the same to several other accounts.

Over a year ago, I had moved my email domain over to Google Apps. Really glad I did – both from a cost and reliability standpoint. Moving to Google Authenticator seemed a logical next choice. I downloaded the app to my iPhone and began the process of setting up 2 Factor on my email. The process was very straight forward.
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VMware – Command line backup of ESXi config

Not being sure how I was going to use my lab while studying for the VCP5-DCV exam, I wanted to have a way to backup the configuration, so that if I exceeded the 60 day eval period, I would have a way of getting the configuration back without having to reconfigure everything. This is also something that is good to have to use with production vSphere server in the real world. This requires vCLI part to be installed on a client workstation. This was done using VMware-vSphere-CLI-5.5.0-1292267.exe. I went to this version of vCLI because I had problems with the 5.1 version running on my Windows 7 32 bit desktop.
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VMware – Adding a NAS for your ESXi Lab

Early on my research for building my VCP lab, I knew that I would need to incorporate a NAS that would need to be capable of serving up both iSCSI and NFS. After doing some testing of both FreeNAS and OpenFiler, I decided to go with FreeNAS. At the time I was looking at a NAS to my lab, 8.3.1 was the current version available. With 9.x still in development/beta at the time, I decided to go with 8.3.1 since there was sufficient information to help streamline the process of getting it up and running a little bit easier.
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VMware VCP – Selecting a Training Provider

With one of the requirements to get VCP5-DCV certification being that you had to go to class, my next step was to find a class that I could attend at a reasonable price given that I would have to factor in the cost of travel, hotel, meals, etc. Since I was going to have to foot the bill for this myself, I wanted to get the best package I could find. VMUG came to the rescue again – since I had purchased VMUG Advantage, this now helped me out with a 20% discount on the training that I was now in search of.
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VMware VCP – Getting the Study Material Together

Since I had made the decision to go to class, I wanted to be as ready as possible to get the most out of class. I started looking for sources of study material that would get me up to speed as quickly as possible and fill in the gaps in knowledge that I had on ESXi and vCenter before class started. After looking for several weeks, I found the first study guide option that ended up being the best resource that I found in several weeks of searching. By a slight change in keywords used in searching on Google, I found ESXLAB.com. Continue reading

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VMware VCP – Building a Lab for Studying

Sorry for the long delay between posts. After the last post I spent all my time studying in advance to be as prepared for the class when the time came (more on that later). After spent several weeks of reading the posts on VMware and other sites, I went with a slightly different approach. I started out with a new Mac Mini (late 2012 model) and upgraded the memory to 16 GB. I then installed a copy of VMware Fusion and installed ESXi under that. Continue reading

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VMware VCP – Getting ready to start a new certification journey

I recently got the opportunity to really learn ESXi. For several years, off and on, i had worked with VMware Workstation, Player, Fusion and Sun’s Virtualbox virtualization options. After having the opportunity to attend a week long class on Cisco’s UCS (Unified Computing System Platform), I was hooked. Even though we didnt get that far into ESXi other than do to a basic install of ESXi, I saw the initial foundation of what could be a very powerful platform while reducing the number of physical servers.

One of the first things I did was to look for how to learn more. I ran across a website for VMUG (VMware Users Group). This started to put me in touch with my local users group as well as see the option for getting benefits that would help lessen the cost of studying for the exam and attending class. A couple of weeks after I joined VMUG, Continue reading

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Raspberry Pi – Tshark Rules AKA Filtering out the Noise

Running Tshark without any Filters or Rules will generate a lot of information to look at, some or most of which you would have any interesting in looking at. I have found that a device generating a lot of ARP requests can either mean a device that is having a problem and needs to be looked at

sudo tshark -R “arp” will show you just the ARP packets that Tshark is seeing on the network.
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