Sep 082014
 

Guest post by Sophie Davidson

Modern day criminals are no longer entering banks with ski masks and pistols. Today’s felons are moving into cyberspace to accomplish their nefarious goals.

Remember the old adage, “a criminal always returns to the scene of the crime”? It turns out this maxim holds a lot of weight with regards to DDoS cybercrime.

Double DDoS

Recent research from BT revealed that about 41% of online businesses surveyed were victims of DDoS in the last 12 months. The more notable findings of the research showed that, of those attacked, over 78 percent were subsequently hit a second time shortly thereafter.

Distributed Denial of Service attacks or DDoS encompass a large variety of cyber threats designed to overwhelm a target’s server, or jam up their network. By disrupting a target’s resources, the hackers succeed in preventing normal traffic (such as users or customers) from passing through.

The effects of these attacks are potentially devastating. After being hit by a strong attack, it takes on average at least 12 hours to offer full service back to users.

What can happen in 12 hours? This sort of disruption could mean losing hundreds of thousands of dollars in revenue. Or, perhaps worse, the trust between the user and the online business, built up over months or years, could be lost in a matter of minutes.
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May 102014
 

terminal1.jpg
Your server appearing pretty slow could be many things from wrong configs, scripts and dodgy hardware – but sometimes it could be because someone is flooding your server with traffic known as DoS ( Denial of Service ) or DDoS ( Distributed Denial of Service ).

Denial-of-service attack (DoS attack) or Distributed Denial-of-service attack (DDoS attack) is an attempt to make a machine or network resource unavailable to its intended users. This attack generally target sites or services hosted on high-profile web servers such as banks, credit card payment gateways, and even root nameservers. DoS attacks are implemented by either forcing the targeted computer to reset, or consuming its resources so that it can no longer provide its services or obstructs the communication media between the users and the victim so that they can no longer communicate adequately.

In this small article you’ll see how to check if your server is under attack from the Linux Terminal with the netstat command

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