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February
27
Other evidence for the SoftBox

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una stelladue stelletre stellequattro stellecinque stelle (Rate this article!)
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Continue the implementation of SoftBox. I finally added the rings and connected to multionda all

The end result is very good aesthetically and structurally speaking, but unfortunately the use is not satisfactory because multionda is still too opaque

I tried to use a reflective plate but not the same satisfactory.

However I think the 25W lamp, which should shed light on how a 130W is not enough and I think then turn back to the classics halogen spotlights, more powerful, but because they produce much more heat will be to understand how the SoftBox Hangers around.

Time will tell.

27
Waiting for the "green screen"

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una stelladue stelletre stellequattro stellecinque stelle (Rate this article!)
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softbox.gif

Waiting for the "green screen" what better time to build a SoftBox?

The SoftBox is essentially a tool photographic or video production to achieve the soft lights. E 'is usually formed by a point light source enclosed within a box covered with reflective material while at an opening of considerable size, there is an opaque material but that lets the light source inside.

I said, what is the best time, if not this, and especially after seeing this very nice hacking.

So armed with holy courage, let's spend a little money in the usual Obi.

Here below the material taken today.

Start with the small panel frontal white and let's polionda four holes at the top. The idea was to use those rings used to make holes in the fences. So 'to have them at home as well as the forceps. The clamp I found at once, the rings, no trace.

They are then passed to thread the threaded metal rods inside the round box and, once fixed inside

I tied the sides so that they match the holes in the multionda.

Let stand for 24 hours.

February
25
Proud to be the Abruzzi, but with a b-only.

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una stelladue stelletre stellequattro stellecinque stelle (Rate this article!)
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I understand when a mistake the name of my region is a "foreign". But when mistakes are my own countrymen, then we step on.

Within the pharmacy and I fell to the eye, on the counter, a stack of brochures illustrating the opening of a new pizzeria. I close a blind eye to that c *** we're doing an ad for a pizzeria in pharmacy, but the thing I come to my attention is the terrible misspelling.

abbruzzesi.jpg

I just hope that the leaflet if they are made by themselves and who have not paid even a chart to do it.

February
24
Experiments with RFID

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una stelladue stelletre stellequattro stellecinque stelle (1 votes, average: 5.00)
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I'm experimenting with the tag is an RFID reader, especially with the kit
PhidgetRFID Kit and PhidgetTextLCD with the idea of using RFID tags to control the access gates to the premises. The devices were supplied to me by my colleague Normando Marcolongo who acquired them on Phidgets and thank you for allowing me to play with this new technology.

The kit contains a bit PhidgetRFID 'RFID tags of different sizes (card, key rings and circles) in addition to satellite receiver. The circuitry of the antenna, in addition to an LED on-board can also add an additional LEDs and a digital output.

The PhidgetTextLCD instead is a 20 × 2 LCD display with a card attached to read the data with 8 analog inputs, 8 digital inputs and 8 digital outputs drive.

Both devices interface to the computer via USB without additional drivers.

I have just a moment a video full of posters RECENZIONI product and more information.

The first impact was still really good. All of these devices is programmable through various interfaces for most common languages, from Visual Basic to C for use even in non-Windows environment. NET, Java,
LabView, Delphi and so on.

What I did in a couple of hours of labor has added a red LED to the RFID reader, and piloted in Visual Basic so that when the program will light the LED on-board and in the presence of a tag is external LED light the red.

Then connect the LCD, I programmed so as to show, the passage of a TAG on the antenna, the tag code and the owner's name on the display

Then I lost most of the time to plan the timing of the display backlight off after 10 seconds of inactivity.

The result is quickly summarized in this video

Ah, in the video, the value of TAG is disguised and distorted. Never know grin.gif

February
23
The afternoon has the video in mouth

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una stelladue stelletre stellequattro stellecinque stelle (1 votes, average: 5.00)
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Here's how to spend a nice afternoon in the company of Adobe Premiere.

It was a long time that I wanted to make a filmatino be used as an intro for my videos related to research and development of the holy grail but I never had the time and willpower to slam his head against Premiere.

Today, in an afternoon, I pulled out this video.

Are absolutely required in addition to welcome comments and improvements of every kind.

In short, the first video with this intro.

February
20
Completed skeleton dell'EmiGreenScreen

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una stelladue stelletre stellequattro stellecinque stelle (2 votes, average: 5.00)
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I was left with the doubt of how to attack the third section to the other two so that the whole is ripegasse inward so they do not then have pieces of cloth to the outside.

Fortunately the idea was given me by our graphic Pierluigi. Attach two strips on one another and use two hinges to make the strip thickness is needed to allow to fold the third section on the other two.

As you can see the idea had by Pierluigi was really clever and it worked perfectly.

That's because the skeleton of GreenScreen in extension

and here it folded.

Now I just have to find the GreenScreen.

February
19
But using an instant messaging better?

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una stelladue stelletre stellequattro stellecinque stelle (Rate this article!)
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From a shell session on a server:

xxx:/home/root# who
root     pts/0        2008-02-19 12:22 (???.???.???.???)
root     pts/1        2008-02-19 12:34
xxx:/home/root# who
root     pts/0        2008-02-19 12:22 (???.???.???.???)
root     pts/1        2008-02-19 12:34 (???.???.???.???)
xxx:/home/root# echo "Ciao Marco, sono Emiliano" > /dev/pts/0
mi leggi?
xxx:/home/root# echo "SI MARCO" > /dev/pts/0
hai letto la mia email?
xxx:/home/root# echo "SI e ti ho risposto" > /dev/pts/0
sto comprimendo la posta, dopo leggo la tua email
xxx:/home/root# echo "ma usare un instant messaging migliore? :-D " > /dev/pts/0
non ho nulla (
xxx:/home/root2# echo "minchia 8=========D" > /dev/pts/0
(???.???.???.???)
xxx:/home/root# echo "Ciao Marco, sono Emiliano" > /dev/pts/0
mi leggi?
xxx:/home/root# echo "SI MARCO" > /dev/pts/0
hai letto la mia email?
xxx:/home/root# echo "SI e ti ho risposto" > /dev/pts/0
sto comprimendo la posta, dopo leggo la tua email
xxx:/home/root# echo "ma usare un instant messaging migliore? :-D " > /dev/pts/0
non ho nulla (
xxx:/home/root2# echo "minchia 8=========D" > /dev/pts/0

19
EmiGreenScreen - How to build a GreenScreen

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una stelladue stelletre stellequattro stellecinque stelle (2 votes, average: 5.00)
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Ok, as I mentioned obliquely in a high post, I want a green screen and saw that on e-bay Italy I could not find and spend 50 euros shipment from the United States did not take me, I'll build.

First is a GreenScreen.

The GreenScreen is in itself a technique of video production. Pre or post production, you delete a color, instead of that color you put something else.

You know the guy that the weather moves across the map with expectations. He is actually confronted with a background in color, usually green or blue, but before sending the images in the ether, the tools of video production remove that color and replace it with the image of the map.

The effect is precisely what the presenter in front of the map


I think that finding a green cloth is not a big problem. Just a moment free I'm going to one of the many markets in the area to see if my optimism about it has paid off.

But what interests me now is the structure on which to mount the green screen. Not having the possibility of placing the cloth permanently to some wall, I have to build something mobile and folding on request.

I thought to organize wood. Let's see what I did before. Here's the equipment purchased today by Obi

I took strips of wood 17 × 17mm square and two meters high, in addition to metal plates and hinges to fold the structure.

Since the 2 × 2 square feet seems excessive to me, I cut in half some boards to build sections one meter by two.

Finally, the construction of this facility has allowed me to use one of those tools bought and never used. The manufacturer of the frame.

Once costruitene two, I joined with hinges purchased. Here below the result standing.

Now remains for me to understand how to add an additional section is also folded structure created so far and find the blessed green screen.

Beware of other photos on Picasa

See you later.

February
18
Your network is under attack? Always on Saturday morning.

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una stelladue stelletre stellequattro stellecinque stelle (6 votes, average: 5.00)
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un_tranquillo_weekend_di_paura.jpg E 'morning, but very late. You get up and you know that today is a special day. And 'Saturday and then have a nice day of relaxation before and Cazzeggio.

You walk to the coffee machine but a glance will fall on your mobile. Turn on or turn it on. This is the dilemma. Of course I turn it on, it's Saturday and everything is perfect.

Beep, Beep. ... Beep, Beep ... .7 unanswered calls. CEO of MICS, connects 1, link 2, link 3, client 1, client 2, client 3.

Ok, the coffee is back on Saturday to relax and cazzeggiando is delayed. I'm going to have a deja-vu. Something bad has happened in Micso.

Time to connect and to call his holiness, the CEO of the firm where I work. From background noise immediately sensed that lies in the server farm and then the situation is tragic, it's worse!

In essence it seems that the firewall that manages and protects the nosta network is blocked.

Well, it starts. Aim of the game: to understand where is the problem and restart the network. The enemies are: time, network complexity and the fact that currently there is remote and therefore unable to gain access to any machine, firewall complete.

Let's see how to proceed.

Step 1 - Shutdown and reboot

Like any good computer, I know the basic rule of any game. If a computer does not work you probably crashed some service or the kernel. It turns off and on again, hoping that the problem will magically resolve itself.

I therefore give the reboot from our CEO to the firewall and look at your fingers crossed.

The response is that the machine is broken down, but got to the loading of firewall rules seems as if it is loading a rule at a time with extreme slowness.

From where the car crashed to start it soon becomes clear that the problem is not software but is on the network. Undoubtedly, somewhere, they're getting a abnormal amount of data, so enormous that the firewall can not make it to manage and then collapse.

The next step is obvious.

Step 2 - Disconnect all

I disconnect all network cables from the firewall that immediately catch your breath. Ok. They begin to hang up the network cables. Very slowly smile.gif

Before the power of our personal cars to work. Everything ok. The firewall still works. Then the cable to the Internet. Still all ok. Now I can finally fall in the firewall.

Finally the cable to the server farm. Buummmm, crashhh, whishhhhhh. Not rifunziona nothing. Ok, the problem was, as anticipated in the server farm.

Undoubtedly there is some machine that is doing casino inside out. This was easy to guess why the attack came from outside if there would be enough bandwidth to saturate and kill the firewall, and then because the firewall would have crashed immediately just hung up the cable to the Internet. But it crashed now.

Given the impossibility of working on the firewall with the network cable connected to the server farm, to understand who and what's slowing down everything, you have to go step by step.

Step 3 - Identify the service under attack

First, let's see if there is a particular service use in acute.

Iptraf active on the firewall, I start listening on to the server farm for ten seconds and I attach the network cable disconnect immediately after making to regain control of the firewall.

The result is obvious.

attacco_micso_2008_02_16_iptraf.png

Someone is doing the naughty on port 53 that is doing a flood of requests on DNS. Let's see who.

Step 4 - Identify the attackers

Doing that is now very simple. We run a tcpdump on the firewall to listen on the network interface of the server farm that scans all incoming packets to and from port 53 and we write everything on a file.

tcpdump -i eth1 -w tcpdump_attacco.dump port 53

Attack the network cable to the server farm for ten seconds and remove to regain control of the firewall. Download the file to your PC at home and got analizziamolo with Wireshark.

attacco_micso_2008_02_16_wireshark.png

Oh, we finally have an IP and then the culprit.

You should have heard, by phone, screaming to the administrator: "Unplug the network cable from that machine, turn it off, burn !!!!!!".

Now that the entire network is back to 100% active, to see if our Saturday or we start to relax only one-tenth of the work you have to understand if the car is ours or is a housing for a client.

If the car is ours, are painful, as we must understand why the car is doing all of this mess, and given that the explanation is one, someone who has succeeded in making some inroads in some vulnerability of the car, took control and now has transformed it into a "monster", we must understand how it came, what other damage was done and how to fix the problem. Then figure out who is responsible for leaving our car with a vulnerability open. A hollow weekend track

Luckily the car is not ours but of our client. Them off and then stays off. Someone will receive a phone call on Monday not so happy by myself grin.gif

Told so it seems as if the thing has been resolved in ten minutes. Actually from the first moment of panic-mode, the second time like "I do not remember this network interface where it goes" and the third time when you go to "ignore-mode = on" it took nearly hour to deal with them.

Oh well, the important thing is that now the 'real' may start Saturday.

February
15
Respect and honor these professionals in the digital video

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una stelladue stelletre stellequattro stellecinque stelle (4 votes, average: 5.00)
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You know the scene of the movie "Saving Private Ryan"? One of the most successful representations of the Normandy landings I have ever seen. Thrill.

To achieve all that Spielberg seems to use more one thousand extras, of course, computer graphics.

But what if you are not Spielberg, unless you have your budget, it was only three and you must still make a landing in Normandy for a BBC documentary.

A video "from fear" shows how three people, a car, shooting photos of scenarios in museums, a digital camera and a PC can create a landing in Normandy worthy of the best Spielberg.

Compared then to the creators of this video "making of". Bellissima inter alia, the choice of the soundtrack of trust which, for those who do not recognize is the song "Two Tribes" of "Frankie Goes To Hollywood."

Three considerations:

  1. God, how many memories on that ground
  2. God how I envy them
  3. I want the GREENSCEEN
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