Question

Denial of service (DoS) attacks can cripple an organization that relies heavily on its web application servers, such as online retailers. What are some of the most widely publicized DoS attacks that have occurred recently? Who was the target? How many DoS attacks occur on a regular basis? What are some ways in which DoS attacks can be prevented?

Answer 1

some of widely publicized DoS attacks are :

1) MAFIA BOY Feb 7 2000 impact : Disrupted access to Amazon.com,CNN,Dell Inc,Ebay,Yahoo

2) ROOT DNS SERVER Oct 21 2002 impact : All 13 of domain name systems root name servers sustained a DoS attack.

3) ESTONIA CYBER ATTACK April 2007 impact : Estonia's financial,government and media online services were knocked offline.

4) PROJECT CHANOLOGY January 2008 impact : Hacktivism gets real when anonymous attacks the science of Churchology.

5) OPERATION ABABIL Dec 2012-Jan 2013 impact : Nation state cyber attacks takes front stage as 26 U.S banks were hit with DDoS attacks.

6)MIRAI IoT BOTNET Oct 2016 impact : Nation-State cyber attacks takes front stage as 26 U.S banks were hit with DDoS attacks.

Targets of DDoS attacks :

DDoS attacks happen to online systems across the spectrum: from commercial entities to government institutions. These are often random attacks without a specific target, which aim to disable as many online services as possible, but even targeted attacks are not so unique, while these attacks may also occur on the basis of a third party order.

An attack against any target can be ordered by practically anyone through a number of anonymous online services. It might be a competitor, a disgruntled client or a hired employee. The lightest attack, lasting several tens of minutes, can take in just under 5 euros. The amount a client pays for a day-long attack starts from 50 euros. In many cases, the victim is exposed to several different attacks simultaneously, for several days or weeks.

Academic Research reports 30000 dos attacks per day.

an average of 3% of the Web sites in .com, .net, and .org were involved with attacks, daily.

6 common ways to prevent your website from ddos attacks :

1) buy more bandwidth

2) build redundancy to your infrastructure.

3) Configure your network h/w against ddos attacks.

4)deploy anti ddos h/w and s/w modules.

5) deploy a ddos protection appliance.

6) protect your dns servers.