Why You Shouldn’t Keep Your Contactless Bank Card and Oyster Card in the Same Wallet

If you’re like me and you’ve recently had a new/replacement bank card, you will have probably noticed a slight change in the appearance of your new card.

Oyster Card and Contactless Bank Card with RFID symbol. Source: londonist.com
Oyster Card and Contactless Bank Card with RFID symbol. Source: londonist.com

The new wireless-looking symbol represents contactless payment capabilities based on radio frequency technology. This means that, in theory, you can make low transaction payments (up to £20 as of this article I believe) simply by tapping on an EPOS terminal without entering your PIN, probably saving you about half a minute every time you make such a payment.

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Profiling JavaScript Execution Times and Calls Using Firebug

If used properly, Firebug can be a very useful tool in helping diagnose performance issues or simply provide an in-depth insight in to a web application or site.

Using the Firebug profiler to get Javascript statistics on a given page is very easy and takes very little time to set-up.

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Hotmail/Outlook Refuses to Open Mail or Folders – Temporary Workaround

If you have problems loading folders or e-mails in Outlook.com/hotmail you’re not the only one.

In the last couple of weeks I noticed this problem on my personal hotmail account; I would repeatedly click e-mails and folders whilst watching that annoying ‘load bar’ scroll across the top of the page.

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Got a WPS Enabled Router? Consider Disabling it or Risk DoS

WPS stands for wi-fi protected set-up. It’s supposed to make it easier for non-tech savvy people to authenticate devices on to a wireless network by pressing a physical button on the router or entering a PIN in to a device to make it known to the network.

The problem with WPS is quite a big one. There are many fundamental flaws in the WPS model – I won’t go through these in this article but a simple Google search will expose these many vulnerabilities in WPS – one which I discovered by accident today is a relatively (scarily) easy denial of service on an end-users network.

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Backing Up an ESXi 5 Guest VM by Exporting to OVA/OVF Template

ESXi acts as a really flexible and powerful monster of an operating system which can easily divvy up your server’s physical hardware in to virtualised components. These components can then be shared among tens of virtual machines depending on how you’ve set things up.

Although flexible and powerful, I could not find any straight forward back-up guides for backing up my virtual machines.
Snapshots are in no way shape or form back-ups so that is out of the question. I did take a look at copying the VMs out of the data store either through the vSphere client or SSH but that is a bit messy. Continue reading Backing Up an ESXi 5 Guest VM by Exporting to OVA/OVF Template