In this lesson, we will talk about those and those attacks, so don't stand for denial of service attack
and those stands for distributed denial of service attack.
Now, what is those attack dogs means creating a fake traffic, a huge amount of fake traffic on your
target so that your target will unable to handle that much of traffic and will crash.
So to make resources unavailable.
Is the main aim of those attack right?
Now, your target could be anything, a normal computer, a server or a Web site, so let's understand
both doors and the doors one by one.
So here is the scenario of DOS attack or denial of service attack.
So this is the attacker machine.
And in this type of attack and attacker can directly use his own machine to perform DOS attack on the
target.
But he will also hack a new computer and a non PC and will use that PC as an attacker machine to perform
the DOS attack on the target so that whenever investigation is conducted, the security experts will
assume that this is the attacker machine and this one is the real criminal.
So to protect ourselves, the attackers would do these kind of attacks, right?
They will hack on another machine and then use that machine to perform attack on the target.
Right.
But to protect ourselves from these kind of attacks, security experts will use more than one server.
Right.
Suppose your target is in Web site.
So experts will look close to that website on more than one server so that whenever traffic increases,
they will divide the traffic on all of their servers.
Right.
They are using load balancers to help protect from those attacks.
Right now, those attack is used normally to take down small targets.
OK, but if your target is big, like your target is Wikipedia, then those attacks will not work on
that Web site.
OK, so you have to go for distributed denial of service attack.
Right.
Which is dos in this did not attack.
A group of hackers will come together to take down a big target.
Right.
So suppose this is hacker A, this is hacker B and this is hacker C, so a single hacker would hack
some other machines.
Right, like this.
And then they all come together and will use all of these machines, OK, to take down a big target,
right?
So this is the minimum scenario because in real world, a single hacker would hack 10, 20 or even more
machines.
So a single hacker may use 20 machines, then a group of hackers, let's say 50 or 100, OK, then multiply
them by 20 so that much of machines come together or used together to take down a big target.
Now, recently, if you heard the news in September 2019, Wikipedia has faced DOS attack and is unavailable
in some of the countries.
Right.
So did us attack once it started?
Cannot be stopped easily.
Right.
You can't stop the attack by using your balancers or by blocking the IP address.
OK, but you can use these kind of security in DOS attack, right?
So they don't attack is a very harmful attack.
And both those and those attacks are illegal in approximately all of the countries.
So be aware before using these kind of attacks on real target until and unless you have the full permission
to do so.
Right.