Smurf Attack: A Comprehensive Guide For 2021


The Smurf Attack is one of the most seasoned, easiest and compelling cyber-attacks, one that can draw down numerous disagreeable ramifications for any focused-on organization. Smurf attacks begin from the attacker’s PC. To start with, they focus on a switch that interfaces with a high number of devices.

Before attempting to comprehend what is a Smurf Attack, we should initially grasp the idea of Smurf DDoS Attack and Smurf DoS Attack.

  • Distributed Denial-of-Service: Distributed Denial-of-Service attack is performed by a few traded-off machines that all objective a similar casualty. It overwhelms the network with data packets.
  • Denial of-Service: Denial-of-Service attack is performed by a solitary host.

Distributed Denial-of-Service or Denial-of-Service attacks by and large attempt to make a network’s resources inaccessible for legitimate users. This generally occurs by sending attacks to it from different places of the network. Distributed Denial-of-Service attacks can be delegated as follows: 

  • Authentication Server attacks
  • CGI Request attacks
  • TCP SYN attacks
  • Flood attacks
  • Coremelt attacks
  • Amplification attacks

In this article let us look at:

  1. What is a Smurf Attack?
  2. Smurf Attack Example
  3. Attack Description
  4. How the Smurf Attack works
  5. Smurf Attack Prevention
  6. Mitigation Methods
  7. DoS Attack Tools

1. What is a Smurf attack?

The Smurf attack is a DDoS attack in which enormous numbers of ICMP or Internet Control Message Protocol packets with the proposed casualty’s spoofed source internet protocol are broadcast to a PC network utilizing an internet protocol broadcast address.

As a matter of course, most devices on a network will react to this by sending an answer to the source internet protocol address. If the number of machines on the network that get and react to these packets is exceptionally huge, the casualty’s PC will be overflowed with traffic. This can hinder the victim’s PC to where it gets difficult to chip away at.

A Smurf attack is a type of Distributed Denial-of-Service attack that causes packet flood on the casualty by abusing/exploiting Internet Control Message Protocol. At the point when sent, enormous bundles are made utilizing a procedure called spoofing. The fake source address currently connected to these packets turns into the person in question, as their internet protocol is overwhelmed with traffic. The expected outcome is to hinder the objective’s framework because it is vulnerable and inoperable.

2. Smurf Attack Example

A Smurf attack is only one illustration of an Internet Control Message Protocol Echo attack. Smurf attack misuses Internet Control Message Protocol by sending a ridiculed ping packet routed to the network broadcast address and has the source address recorded as the person in question. On a multi-access network, numerous frameworks may answer.

3. Attack Description

In a standard situation, the host sends an Internet Control Message Protocol Echo (ping)  solicitation to another host, setting off a programmed reaction. The time it takes for a reaction to show up is utilized as a proportion of the virtual distance between the two hosts.

In an internet protocol broadcast network, a ping demand is shipped off each host, inciting a reaction from every one of the beneficiaries. With Smurf attacks, culprits exploit this function to intensify their attack traffic. 

4. How the Smurf Attack works

  • In the first place, the Smurf malware assembles a spoofed packet with its source address set to the genuine internet protocol address of the focused on the victim.
  • The packet is then shipped off an internet protocol broadcast address of a firewall or router, thus sending solicitations to each host device address inside the broadcasting network.
  • Every device inside the network gets the solicitation from the broadcaster and afterwards reacts to the objective’s spoofed address with an Internet Control Message Protocol Echo-Reply packet.
  • The target victim at that point gets a downpour of Internet Control Message Protocol Echo-Reply packets, conceivably getting overpowered and bringing about DoS to legitimate traffic.

5. Smurf Attack prevention

  • Disable internet protocol -coordinated transmissions on your router.
  • Reconfigure your OS to deny Internet Control Message Protocol reactions to internet protocol broadcast demands.
  • Reconfigure the perimeter firewall to prohibit pings beginning from outside your network.

6. Mitigation methods

Smurf attack moderation depends on a mix of CO or Capacity Overprovisioning and the presence of separating administrations to distinguish and impede unlawful Internet Control Message Protocol reactions. 

Infrastructure Protection, one of Imperva Distributed Denial-of-Service relief arrangements, utilizes Border Gateway Protocol routing to coordinate all approaching traffic through an overall network of scouring focuses. 

After an exhaustive review of approaching traffic, all unlawful packets, including spontaneous Internet Control Message Protocol reactions, are distinguished and obstructed outside your network.

7. DoS attack tools

  • Botnets
  • Panther
  • Blast
  • Land and LaTierra
  • Nemesy


Smurf is an old procedure because of the prominence of sending and essential pre-emptive avoidance strategies. Neither money misfortune nor data penetrate nor notoriety harm is something you would need for your organization. Just like in the case of any cybersecurity risk that is out there, counteraction and prevention is the best procedure. Thus, you must know what it means and how can you curb it.

So, have you made up your mind to make a career in Cyber Security? Visit our Master Certificate in Cyber Security (Red Team) for further help. It is the first program in offensive technologies in India and allows learners to practice in a real-time simulated ecosystem, that will give them an edge in this competitive world.



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