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Showing posts with label Network. Show all posts
Showing posts with label Network. Show all posts

Thursday, May 31, 2012

The Flame Virus:one of the most complex threats ever discovered

A frightening computer virus called Flame is on the loose in Iran and other parts of the Middle East, infecting PCs and stealing sensitive data. Now, the United Nations' International Telecommunications Union warns that other nations face the risk of attack.
But what is Flame, exactly, and is it cause for concern among ordinary PC users? Here's what you need to know about what Kaspersky calls “one of the most complex threats ever discovered.”

Flame Virus: The Basics

Kaspersky describes Flame as a backdoor and a Trojan with worm-like features. The initial point of entry for the virus is unknown -- spearphishing or infected websites are possibilities -- but after the initial infection, the virus can spread through USB sticks or local networks.
Flame is meant to gather information from infected PCs. As Kaspersky's Vitaly Kamlyuk told RT, the virus can sniff out information from input boxes, including passwords hidden by asterisks, record audio from a connected microphone and take screenshots of applications that the virus deems important, such as IM programs. It can also collect information about nearby discoverable Bluetooth devices. The virus then uploads all this information to command and control servers, of which there are about a dozen scattered around the world.
The virus is reminiscent of the Stuxnet worm that wreaked havoc on Iran in 2010, but Kaspersky says Flame is much complex, with its modules occupying more than 20 MB of code. “Consider this: it took us several months to analyze the 500K code of Stuxnet. It will probably take year to fully understand the 20MB of code of Flame,” the firm said.

What Are Flame's Origins?

The Flame Virus: Your FAQs AnsweredFlame has been in the wild since 2010, according to Kaspersky, but its creation date is unclear. The virus was discovered a month ago after Iran's oil ministry learned that several companies' servers had been attacked. That finding led to more evidence of attacks on other government ministries and industries in Iran.
Iran has claimed that the attacks also wiped the hard drives of some machines, but Kaspersky claims that the malware responsible, called Wiper, isn't necessarily related. Wiper attacks were isolated to Iran, while Flame has been found in other countries.
Flame's creator is also unknown, but a nation-state was likely behind it. The virus is not designed to steal money from bank accounts, and is much more complex than anything commonly used by “hacktivists,” so a nation-created virus is the only other possibility that makes sense.

Who is at Risk?

The United Nations' International Telecommunications Union is now warning other nations to “be on alert” for the virus, which could potentially be used to attack critical infrastructure. In a statement to Reuters, the U.S. Department of Homeland Security said it was “notified of the malware and has been working with our federal partners to determine and analyze its potential impact on the U.S.”
Security firms have not been warning of any direct risk to average Internet users. Sophos' Graham Cluley noted that Flame has only been discovered in a few hundred computers. “Certainly, it's pretty insignificant when you compare it to the 600,000 Mac computers which were infected by the Flashback malware earlier this year,” Cluley wrote in a blog post.

Read more »

Wednesday, May 30, 2012

Internet traffic to grow four-fold to 2016 - survey

AFP - The boom in the number of mobile Internet devices and tablet computers in use will help quadruple Web traffic in the coming years, a study said Wednesday.
The Cisco Visual Networking Index said global Internet traffic by 2016 will be 1.3 zettabytes. A zettabyte is one trillion gigabytes, or one sextillion bytes.
That will be four times the level of traffic generated in 2011, according to Cisco, and comes from a proliferation of tablets, smartphones and other devices that use the Internet.
"Each of us increasingly connects to the network via multiple devices in our always-on connected lifestyles," said Cisco vice president Suraj Shetty.
"Whether by video phone calls, movies on tablets, web-enabled TVs, or desktop video conferencing, the sum of our actions not only creates demand for zettabytes of bandwidth, but also dramatically changes the network requirements needed to deliver on the expectations of this ?new normal.'"
By 2016, the forecast projects there will be nearly 18.9 billion network connections, or nearly 2.5 connections for each person on earth, compared with 10.3 billion in 2011.
It also cited United Nations estimates that there will be 3.4 billion Internet users by 2016, or about 45 percent of the world's projected population.
The average fixed broadband speed is expected to increase nearly fourfold, from nine megabits per second (Mbps) in 2011 to 34 Mbps in 2016.
Cisco also said that by 2016, over half of the world's Internet traffic is expected to come from Wi-Fi connections.

Tuesday, May 22, 2012

Problems Web surfing

DNS is one of the most essential services on any Windows network. Active Directory can’t function without DNS, and it’s is also used by any number of other network functions. So it’s critical to troubleshoot DNS problems as fast as possible. Thankfully, the process is usually fairly easy.
If you're having problems Web surfing, you may have a DNS problem. Here are quick ways to fix it.
Using Google DNS enables you to access those websites (not all) that are blocked by your ISP :

You can try other free DNS servers too :
1. Google DNS
8.8.8.8
8.8.4.4

2. OpenDNS
208.67.222.222
208.67.220.220

3. ScrubIt
67.138.54.100
207.225.209.66

4. Level 3 Communications
4.2.2.1
4.2.2.2
4.2.2.3
4.2.2.4
4.2.2.5
4.2.2.6

5. DNSadvantage
156.154.70.1
156.154.71.1

6. Servermatrix
216.185.111.10
69.56.222.10
67.19.0.10
67.19.1.10
70.84.160.11

7. Public Name server IP address
209.244.0.3
209.244.0.4

8. Norton Public DNS
198.153.192.1
198.153.194.1

 

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