Everything You Need To Know About DDoS Attacks

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What is a DDoS Attack?

Distributed Denial of Service attacks(DDoS) is a popular attack method of hackers due to the simplicity of the attack DDoS attack is something from which hackers can flood the IP addresses with thousands of messages, taking the network to the point where organic traffic(legit users) are not able to get through which results in denial of services. DDoS attacks achieve their full potential by using multiple computer systems as their source of attack traffic.

Botnet

Devices such as computers or IoT devices that are already infected by the malware allow themselves to be remotely controlled by the hackers(attackers), these individual devices are referred to as bots, a group of such bots is known as a botnet(zombie network).

There are 3 basic categories of DDoS attacks:

  • Protocol attacks
  • Volume-based attacks
  • Application attacks

Some typical targets of DDoS attacks are:

  • Any business/organization that particularly depends on providing online services
  • Online shopping websites 

How a DDoS attack is executed?

Web servers have a limited bandwidth in which they can serve some limited numbers of requests at a time, whenever this capacity is exceeded one of the components of infrastructure behaves inappropriately

  • Response to the requests would be much slower than normal.
  • Some or all of the user requests could get ignored 

DDoS attack prevents web resource’s normal functioning which results in total denial of services. The attacker may also request payment to stop the attack or it could be an attempt to discredit or damage a competitor’s business.

Do You Know All About DDoS Attack IN 2021

Some common DDoS attacks:

HTTP Flood: This appears to be legitimate GET or POST requests that are exploited by hackers. It uses less bandwidth than other types of attack but it can force the server to use maximum resources.

  • SYN Flood: SYN Flood uses weaknesses present in the TCP connection sequence. The host system gets a synchronized (syn) message to begin the “handshake” then the server acknowledges the message by sending an acknowledgment flag to the initial host, which then closes the connection. However, in syn flood spoofed messages are sent to the host which doesn’t let the connection close and results in the shutting down of services.
  • Ping of Death: it manipulates IP protocol and sends a malicious ping to the system. It was popular 20 years ago but now it is the least effective attack.
  • UDP Flood: User Datagram Protocol(UDP) is a sessionless networking protocol. It targets random ports on the system or network with UDP packets, the targeted system or network checks for applications listening to those ports but no application is found. 

How to stop a DDoS attack :

Make a Denial of services response plan 

  • System/network: One should develop a full list of assets and also need to ensure the implementation of advanced threat assessment and identification tools.
  • Response team: There should be an organized reaction as soon as the attack happens to minimize the damaging impact and save yourselves from months of recovery 

Securing your Network Infrastructure:

  • You can rate limit your router to prevent your web server from being overwhelmed if you run your web server. 
  • Your systems should be up-to-date because outdated systems only have most of the loopholes and updated systems close more doors for the attacker and that strengthens your network infrastructure.
  • you can increase your bandwidth so that you can get extra time to act before our resources get overwhelmed.
  • You can also run DDoS testing with Penetration Testing to secure our servers.

Strong Network Infrastructure:

  • One should focus on a secure network architecture(that is vital for security)
  • Businesses should have redundant network resources so that if one of the servers is under attack another server could handle the extra traffic.
  • If possible your business servers should be located in different geographical places which makes it difficult for an attacker to attack those targets 

Conclusion:

Hopefully, the above information gave you an insight into DDoS attacks, if you are trying to save money on bandwidth from spambots web applications firewalls could also be an effective solution.

Reference links:

https://en.wikipedia.org/wiki/Denial-of-service_attack

https://phoenixnap.com/blog/prevent-ddos-attacks

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