20
Jan 12

What is cloud?

Recently I was asked by my non-IT friend (imagine that!) to explain what the cloud is. I thought for a moment, and here is what came to my mind…

Imagine if all chairs in your house would miraculously appear when you want to sit down. They would just materialize under your butt, at any moment, at any table or corner where and when you need it. When you don’t need it, it disappears, and is possibly used by somebody else across the block for the same purpose. There is always enough chairs for everyone, but not enough for everyone at the same time or at the same place. When cloud malfunctions you fall. That happens very rarely, so if you have a critical dinner, or somebody who needs to be seated more often, you may want to allocate a “dedicated” chair.

The explanation was accepted. My friend now tells me that whenever she needs to sit down, she first checks if the chair is actually there…

By the same, nobody calls rent-a-car a “car cloud”, but that what it actually is! Compare owning a car to renting a car, or “zipping” a car, and many of the buzzwords about the cloud would become totally applicable.

Anyone can get access to the car
You pay for it while you use it
Give it back and you quit paying
Available on demand

Buying/leasing a car with drive off fees, registration, maintenance etc. as a comparison .

What is it? Cloud computing is essentially the outsourcing of computing resources such as data storage and software. Instead of buying servers and paying a phalanx of IT specialists to maintain them, small businesses can rent space on an off-site server and connect to their data remotely, from anywhere in the world.

What’s in it for you? Think of it this way: In the long run, renting an apartment is more expensive than buying a house, but not when you consider that houses need to be maintained. In the same way, servers require frequent upgrades and sometimes must be entirely rebuilt. By renting space in the cloud, companies off-load many of the costs associated with maintenance.

Is your data safe? Most cloud servers are protected by some of the most sophisticated security software in the world. Indeed, one of the major reasons Google reacted so swiftly to allegations of Chinese cyber-spying earlier this year related to concerns over perceptions that the company’s servers weren’t secure. Nonetheless, many CEOs remain wary of hosting sensitive data on rented computers.

So what’s the catch? For some forms of data, Canadian law requires that the material be stored on computers located inside the country. As such, some services available to small businesses south of the border aren’t available in Canada. To remedy this, U.S. cloud providers are increasingly partnering with local firms; others are pressuring Canadian politicians to amend the rules. If all goes according to plan, in less than a decade, the individual small business server may be little more than a quaint memory.

One of the best article I have found for setting up a private cloud is http://www.akashsharma.me/private-cloud-setup-using-eucalyptus-and-xen/


08
Jan 12

Introduction to IPv6

Here are some resources about IPv6 that I think are interesting. Let’s start with a short but good video introduction from Defcom 2010 by Sam Bowne

Microsoft has extensive data on IPv6 from primers to advance: Introduction to IPv6 and IPv6

Of course CISCO also has an outstanding library:
This article will show you a comparison between IPv4 and v6 Headers: IPv6 Internals

IPv6 problem from a basic technical level and business perspective. Basic technical information may be limited to address space concerns and high-level differences from IPv4. ARIN.net has some pre-packaged presentations that could help here: IPv6 Executive Briefing

Deeper technical discussing concerns with DHCP, DNS, Addressing, Headers, ICMP, Broadcast/Multicast, etc. Your TCPDump information may come in handy here. What you need may already be available here: Wireshark sample captures


30
Dec 11

Gratinerad hummer

Här är recepten vi tänker bjuda våra vänner på Nyårsmiddag.

Till 4 personer:
2 kokta humrar
2 schalottenlökar
1 vitlöksklyfta
100 g färska champinjoner
2 tomater, skalade och urkärnade
1 msk smör
1 dl vitt vin
1 tsk dijonsenap
1 msk vetemjöl
2 dl vispgrädde
½ tsk salt
½ krm cayennepeppar
2 msk finhackad persilja
1 dl nyriven parmesanost

Gör så här:
Sätt ugnen på 275 grader.
Klyv humrarna på längden. Ta ur köttet och skär det i grova bitar. Låt klorna sitta kvar.
Koka upp vatten och lägg i tomaterna. Lyft upp när skinnet börjat lossna. Tra av skinnet och kärna ur tomaterna.
Finhacka schalottenlöken. Tärna champinjonerna och tomaterna fint. Pressa vitlöken.
Sätt en låg, vid kastrull på medelvärme och fräs löken, vitlöken och champinjonerna i smör så att de får lite färg. Slå på vinet och låt det koka in.

Tillsätt senap och vetemjöl och blanda väl. Slå i grädde och rör till en slät stuvning. Låt koka i 3-5 minuter.
Vänd ner tomater och hummerkött.
Rör försiktigt och dra kastrullen från värmen. Hummern får inte koka, då blir den lätt seg.
Smaksätt med salt och cayennepeppar. Blanda ner persiljan.
Lägg de tomma hummerskalen i en ugnssäker form. Fördela stuvningen i skalen. Strö över riven ost och gratinera högt upp i ugnen i 5 minuter.

Njut av måltiden med vänner och ha ett

Gott Nytt År


28
Dec 11

Cryptography Tutorial Video

FREE Webinar on Cryptography By Rahul Kokcha (Author of this Video)


15
Dec 11

For Your Inspiration, Beautiful Examples Of Digital Portraits

Portrait photography the most commonly used in the world of photography also known as portraiture. Portraits photography is the photographic phrase of the likeness of a person or a small group of people (a group portrait), in which the face and appearance is prime. The aim is to display the similarity, persona, and even the mood of the subject. Portraits can be more outstanding and eye-catching with digital retouching. Luca Pierro shows some of his hard work by screening the portraits is digital mode. Let’s have a look below
DIGITAL SELF PORTRAITS 6 For Your Inspiration, Beautiful Examples Of Digital Portraits
DIGITAL SELF PORTRAITS 5 For Your Inspiration, Beautiful Examples Of Digital Portraits
DIGITAL SELF PORTRAITS 1 For Your Inspiration, Beautiful Examples Of Digital Portraits
a143bba7cb51238a37821dad9786be48 For Your Inspiration, Beautiful Examples Of Digital Portraits
48002c4e6fd2e6baf1d6ae2f97b481ce For Your Inspiration, Beautiful Examples Of Digital Portraits
ea60856556056da113fa50cbcd62f787 For Your Inspiration, Beautiful Examples Of Digital Portraits
DIGITAL SELF PORTRAITS 22 For Your Inspiration, Beautiful Examples Of Digital Portraits
DIGITAL SELF PORTRAITS 21 For Your Inspiration, Beautiful Examples Of Digital Portraits
DIGITAL SELF PORTRAITS 20 For Your Inspiration, Beautiful Examples Of Digital Portraits
DIGITAL SELF PORTRAITS 19 For Your Inspiration, Beautiful Examples Of Digital Portraits
DIGITAL SELF PORTRAITS 18 For Your Inspiration, Beautiful Examples Of Digital Portraits
DIGITAL SELF PORTRAITS 17 For Your Inspiration, Beautiful Examples Of Digital Portraits
DIGITAL SELF PORTRAITS 16 For Your Inspiration, Beautiful Examples Of Digital Portraits
DIGITAL SELF PORTRAITS 15 For Your Inspiration, Beautiful Examples Of Digital Portraits
DIGITAL SELF PORTRAITS 14 For Your Inspiration, Beautiful Examples Of Digital Portraits
DIGITAL SELF PORTRAITS 13 For Your Inspiration, Beautiful Examples Of Digital Portraits
DIGITAL SELF PORTRAITS 12 For Your Inspiration, Beautiful Examples Of Digital Portraits
DIGITAL SELF PORTRAITS 11 For Your Inspiration, Beautiful Examples Of Digital Portraits
DIGITAL SELF PORTRAITS 10 For Your Inspiration, Beautiful Examples Of Digital Portraits
DIGITAL SELF PORTRAITS 9 For Your Inspiration, Beautiful Examples Of Digital Portraits
DIGITAL SELF PORTRAITS 8 For Your Inspiration, Beautiful Examples Of Digital Portraits
DIGITAL SELF PORTRAITS 7 For Your Inspiration, Beautiful Examples Of Digital Portraits