The virtual world offers a great number of advantages to its users, and that is clear. However, threats are the order of the day, and anyone can become a victim. Today you will learn about the most frequent types of DDoS attack, so as not to fall unprepared.
What Is a DDoS Attack?
Among the many computer
threats that exist, one of the most common is the DDoS attack, which stands for denial of service. This is
carried out before a system a network.
On the other hand, when
this attack occurs, regular users of said system or network are restricted, that is, they
lose access to its functions and characteristics. This is because the
victim's bandwidth and computing resources are overloaded.
To carry out an attack
of this type, cybercriminals are dedicated to saturating the access ports with an enormous
amount of data, which exceeds the capacity of these and, consequently, is
unusable.
The frequency of DDoS
attacks have become more and more frequent in recent years, as many companies
have been victimized by hackers, only to be extorted later.
These are the main types
of DDoS attack:
1. Ping of Death
This variant of DDoS attack consists of the alteration
of an IP protocol, which occurs when a latency
measurement tool, known as ping, is sent to a system. Said shipment is
made massively and maliciously, to collapse the recipient.
2. Slowloris
The slow loris attack
occurs when the server's resources are reduced to a minimum because they have
been collapsed by a massive sending of HTTP connections. It has
become one of the most difficult types of DDoS to overcome.
3. Syn Flood
This attack is one of
the most sophisticated, since it consists of an attacker impersonating the identity or
credentials of a regular user, flooding the servers with SYN packets, causing their
total collapse. On some occasions, they manage to be detected by
firewalls.
4. Flooding
of Unserved Ports
When the ports are out
of service they are flooded, it is because they suffer a massive sending of TCP / UDP packets, affecting even
those servers that are not in use. In this sense, the system cannot find
alternatives to avoid the attack.
5. Chunk Flood
It happens when
countless fragmented packets enter
servers, circumventing any type of firewall. They are among
the most dangerous because they require highly sophisticated defenses.
6. Flooding from Anomalous Packets
In this case, the servers become unusable due to the massive
presence of failed packets, generating an unexpected overload. This type of
attack can be avoided with a properly configured firewall.
7. Flooding Due to Mixing
It is an extremely risky
attack since it consists of a combination of several types of attack, which are launched
at the same time. This causes not only the collapse of the servers but also a total reconfiguration of the system.
8. Flooding of Service Ports
There are some ports
whose purpose is to facilitate large volumes of data. In other words, they
are sensitive ports, given the information they handle and the importance they
have for their users. In this attack, these ports are completely collapsed.
Many large companies
have been victims of this variant, and the investment they have had to make to
recover and face them is enormous.
9. ICMP Flood
It consists of an attack
using which large volumes of ICMP
packets are sent. These generate a slowdown of the servers that end
up severely damaging the system and occupying the bandwidth.
Due to their
characteristics, they are usually carried out by cybercriminals who use quite
advanced tools, and who focus on victims who can extort money, in this case,
companies with high standards.
10. Zombie Flood
It is one of the most complex attacks that
exist, since authentic connections that
have been taken by cybercriminals are using. Therefore,
since they are not false packets, the network and its protection cannot
identify them.
As a consequence, the
network is completely unusable, while the bandwidth is overwhelmed. Highly
specialized mechanisms are required to overcome them.
Although this note has
mentioned the ten main DDoS attacks, it is good to clarify that there are many more and that hackers
do not rest on the development of other new techniques, as better defenses are
developed.
In any case, the best way to avoid these types of DDoS attacks is to protect servers and routers as much as possible, implementing high-end firewalls. Likewise, companies must have computer personnel who are constantly updated.
Install Protegent Free Antivirus Software on a trial basis and observe the high-end protection.
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