Question

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Case Project 5-1: 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? Write a one-page paper on your research.

Answer 1

step1# Some recently occured publicized DOS attacks are:

GitHub,Feb, 2018

• A DDOS attack occured with 1.3 Tbps of traffic which flooded all of its servers servers with 126.9 million packets of data each second. It was one of  the biggest DDoS attack recorded in that time. It occured for about 20 mins due to the mitigation services used by the Git.

Dyn,Oct, 2016)

• Hackers created a massive botnet incorporating IoT devices with a malware called mirai to launch. It had trickle-down effects, servers of the company Dyn’s went down , customers found their websites full of DNS errors .

BBC,Dec, 2015

• A group of hackers called “New World Hacking” launched a 600 Gbps attack with the use of BangStresser application tool which lead the BBC’s sites, and its iPlayer on-demand service, down for about 3 hours. BBC attack used tools to launch which actually utilized cloud computing resources from two Amazon AWS servers.

The targets are mostly the best service provider of the time like cloud computing . The target is mainly to serve to extort money or disrupt the operations of a private or govt enterprise. It may be done for some personal benefits or to harm others. The researchers have discovered that there is about 28,700 dos attacks occuring perday over the internet.

step2# Some steps to prevent Ddods attacks

Use of more bandwidth

• Make sure yyou have enough bandwidth which can handle spikes in traffic which may occur due to malicious activity.

Building redundancy in infrastructure

• Make the infrastructure as hard as possible so that it will be difficult for an attacker to lauch the attack. Spread it in different data centers with a good load balancing system to distribute traffic between them.

Configuring network hardware against DDoS attacks

• Configure the hardwares like  firewall or router for droping incoming ICMP packets or blocking DNS responses from outside your network. It can prevent DNS and ping-based volumetric attacks

Deployment of DDoS protection appliance.

• There are many security vendors like Fortinet, Check Point, Cisco which offer appliances that sit in front of network firewalls and block DDoS attacks before they can take effect.

Protecting DNS server

• Attackers can bring your server offline by Ddos attacks so it is important that your DNS servers have redundancy, and place them in different data centers behind load balancers.