What is DDOS attack?

Have you ever had a situation when you are browsing your favorite web-site or watching online stream video and suddenly pages on a site or a video stop loading? You may think your internet is down, but other pages load normally!? You would think that the site owners need to get a better hosting. But the thing is that most likely site is being hit by DDOS (distributed denial-of-service) attack.

DDOS attack can come in numerous forms like amplifications attacks, nukes, teardrops, etc. But in most cases it will look the same way –  a large network of remote PCs grouped together (called botnet) will overwhelm specific site by creating a huge amount of connections or processes causing it to deny its service to the regular users.

First and the most simple type of attack is to attempt to overwhelm the system often by sending garbage stream like a massive amount of pings or sending endless fragments packages without any instruction to the system how to combine them together.

Another type of attack is to force a web-site to respond to the nonsense that is sent to it. This can be done in different ways, but the result will be the same – ICMP (Internet Control Message Protocol) destination error.

The third type of attack is considered to be the most dangerous move among all DDOS arsenal – DNS server amplification attack. This technique uses an individual PCs ability to act as its domain name server to request the same sort of junk from other techniques, then forward it to the target, amplifying severity of attack ten or even fifty times.

HitechServiceLLC has a valuable experience in managing different DDOS attacks. One of the most interesting is described under case studies category on our site. There was an email received by a client with threads to attack their services. When attacks started, they were treated properly to keep the system safe. Read more about this case here.

Also check more network security articles below:
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