Author Topic: What is a DDoS Attack...?  (Read 661 times)

sandeep2444

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What is a DDoS Attack...?
« on: December 13, 2014, 05:05:05 AM »
Hi,

A Denial of Service (DoS) attack usually either involves attackers sending messages to exploit certain
vulnerabilities leading to the abnormality or paralysis of business systems, or sending a massive amount of
regular messages quickly to a single node to run out the system resources resulting in business system failure.
So long as administrators stay on top of patching vulnerabilities and optimizing the performance of business
systems, the potential harm of a simple DoS attack is relatively minor.
A Distributed Denial of Service (DDoS) attack is a DoS attack utilizing multiple distributed attack sources.
Typically, the attackers use a large number of controlled bots (also referred to as zombies) distributed in
different locations to launch a large number of DoS attacks against a single target or multiple targets. With the
rapid development of botnets in recent years, the attack traffic scale caused by DDoS attacks has been
increasing, with the targets including not only business servers, but also Internet infrastructures such as firewalls,
routers and DNS systems as well as network bandwidth. The attack influence sphere has also become broader.

priyanka

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Re: What is a DDoS Attack...?
« Reply #1 on: December 13, 2014, 09:20:42 PM »
hi,

DDOS is a type of DOS attack where multiple compromised systems -- which are usually infected with a Trojan -- are used to target a single system causing a Denial of Service (DoS) attack. Victims of a DDoS attack consist of both the end targeted system and all systems maliciously used and controlled by the hacker in the distributed attack.

Thanks
priyanka

nidhinpereira

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Re: What is a DDoS Attack...?
« Reply #2 on: December 27, 2014, 06:28:39 AM »
hello,

A Distributed Denial of Service (DDoS) attack is an attempt to make an online service unavailable by overwhelming it with traffic from multiple sources. They target a wide variety of important resources, from banks to news websites, and present a major challenge to making sure people can publish and access important information.

Building Capacity

Attackers build networks of infected computers, known as 'botnets', by spreading malicious software through emails, websites and social media. Once infected, these machines can be controlled remotely, without their owners' knowledge, and used like an army to launch an attack against any target. Some botnets are millions of machines strong.
Launching Attacks

Botnets can generate huge floods of traffic to overwhelm a target. These floods can be generated in multiple ways, such as sending more connection requests than a server can handle, or having computers send the victim huge amounts of random data to use up the targetís bandwidth. Some attacks are so big they can max out a country's international cable capacity.
Selling Silence

Specialized online marketplaces exist to buy and sell botnets or individual DDoS attacks. Using these underground markets, anyone can pay a nominal fee to silence websites they disagree with or disrupt an organizationís online operations. A week-long DDoS attack, capable of taking a small organization offline can cost as little as $150.

santhoshidatasoft

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Re: What is a DDoS Attack...?
« Reply #3 on: March 28, 2015, 12:04:07 AM »
A Distributed Denial of Service (DDoS) attack is an attempt to make an online service unavailable by overwhelming it with traffic from multiple sources. They target a wide variety of important resources, from banks to news websites, and present a major challenge to making sure people can publish and access important information.