What is a Denial Of Service Attack?
- A denial of service attack (DOS) is an attack through which a person can render a system unusable or significantly slow down the system for legitimate users by overloading the resources, so that no one can access it.
- If an attacker is unable to gain access to a machine, the attacker most probably will just crash the machine to accomplish a denial of service attack.
Types of denial of service attacks
There are several general categories of DoS attacks.Popularly, the attacks are divided into three classes:
- bandwidth attacks,
- protocol attacks, and
- logic attacks
What is Distributed Denial of Service Attack?
- An attacker launches the attack using several machines. In this case, an attacker breaks into several machines, or coordinates with several zombies to launch an attack against a target or network at the same time.
- This makes it difficult to detect because attacks originate from several IP addresses.
- If a single IP address is attacking a company, it can block that address at its firewall. If it is 30000 this is extremely difficult.
Readers Who Read This Page, Also Read:
2 comments:
Yeah, recently DDOS attack is getting too famous. And they are using a technique called REFLECTIVE AMPLIFICATION. Do you know anything bout this technique?
@ blaster
Recursive amplification
This type of attack uses IP address spoofing, a type of impersonation technique, where
the attacker transmits packets with a forged source IP address rather than its own. The
attack also exploits DNS servers that allow open recursion. Recursion is a method of
processing a DNS query in which a name server pursues the query for a client at
(typically) the authoritative name server for the name. When recursion is performed for
any client as opposed to a trusted set of clients, a name server is said to be an open
recursive server. Finally, the attack uses amplification, where the attacker sends a small
request with the expectation of invoking a much larger response.
Post a Comment