Archive for the ‘Uncategorized’ Category

Hack Attacks – The New Way To Protest

Monday, April 18th, 2011

Every now and then a government website or server gets it. I wonder what the Italian politicians did this time. In February www.governo.it had a really hard weekend of DDoS attacks.

Apparently, the attack was a direct protest against Prime Minister Silvio Berlusconi. It seems that DDoS has become the universal tool for hacker groups to express their hurt feelings. According to ANSA (Agenzia Nazionale Stampa Associata), the group behind the assault is in fact „Anonymous”. This is believed to be the same hacker group which rendered unusable the sites of Visa and MasterCard, back in 2010. Back then the group took credit for the attack, explaining it is retaliation to the acts against Wikileaks.

One reason for the group software experts to attack is the recent sex scandal involving Berlusconi. It seems the group is after the assets of countries with political unrest. The group might also stand behind other government sites’ attacks, including Tunisia, Yemen and Egypt.

It seems like the “Hacktivist” group “Anonymous” moved away from the western front, after attacking Visa, MasterCard, PayPal and Amazon and it is now showing strong discontent with Eastern authorities. Their main weapon remains the DDoS attack. This type of attack remains one of the most effective ways to render sites and network unusable. Smaller sites are practically defenseless. It is a good thing small sites rarely witness the wrath of DDoS. Such attacks are hard to organize due to the number of network devices which need to be utilized.

It seems it is only a matter of time before the next attack takes place. After western sites and eastern governments got a taste of the dark side of the Internet it is not unlikely for Europe to be the next battlefield. There is nothing left but to wonder which country or company will be next.

Home Server on a Laptop

Friday, April 1st, 2011

I often feel guilty about my home server endeavors. My home projects usually take place in the spare bedroom, involving a lot of old hardware. Old hardware has one nasty property – it consumes a lot of energy.

This simple fact holds me back on some test and projects I would like to try. I put much effort to save energy and wasting it again with pre-2000 hardware doesn’t feel right.  Good thing ebay.com and old laptops exist. You can buy an old laptop on the cheap and do tons of things with it. You can get one with a faulty screen. You won’t need it much anyway and you will save some money.

There are several advantages to laptops. They consume a lot less energy than a desktop machine, they also run quiet, take up less space and run on batteries. With the last feature you basically get a built in UPS, and a good one too. Even if the battery doesn’t hold charge, try to drain it a couple of times. You should notice the improvement.

I’ve really enjoyed this project at earth.org.uk. It began as a transition from desktop to laptop server, but it ended up using the SheevaPlug. Along the way some great advances were made. You don’t need to do half the stuff on the journal to save power while running a web server, files server, DNS, Wi-Fi access point, mail server, etc. The author simply decided to cut back on any unwanted services and power drains. He decided to switch to solar power, and was able to take the laptop off the grid for about 50% of the day, further cutting back on overall power consumption.

One of the several things anyone can do, without further investment in solar panel and additional installation costs, is to use Linux and enable all possible energy saving features available. Adding more RAM (also cheap on eBay), should take some load off the hard drive and thus save energy. Enabling laptop-mode, while installing Linux also allows the OS to take advantage of the fact it is being used on a laptop. The author also used an SSD drive in order to lower power consumption and improve performance. There is no need for a newer laptop, but be advised that older hard drives might consume more than a newer SSD drive. Compatibility might be an issue as well. If you are low on RAM and have little room to expand, avoid installing the X window system.

If you feel adventurous, go ahead and try out this project. It might be a bit out of date, but the principle remains the same. So as a weekend project, check how long you can keep your home server online.