A DDoS attack, as we know, happens when a group of computers generates a huge amount of traffic to floods a website with traffic, overwhelming the server so that it crashes, meaning that legitimate traffic cannot reach the site. A botnet is the name for the collection of computers that have been affected by a virus or malware for this purpose. Control over these botnet computers is taken over by the person who has installed the virus or malware , known as a botnet herder. Often, the botnet herder will rent out access to their botnets to people wanting to inflict a DDoS attack on an intended victim or victims. Attacks like these can put a huge strain on networks because of the massive surge in bandwidth usage. They have even been known to take down whole networks and slow down the whole internet.
|Published (Last):||10 February 2019|
|PDF File Size:||14.67 Mb|
|ePub File Size:||20.81 Mb|
|Price:||Free* [*Free Regsitration Required]|
Starting in , there was a significant increase in the use of a specific distributed denial of service DDoS methodology known as DrDoS. The technique shows no signs of obsolescence; it continues to grow in effectiveness and popularity.
Requests to the victim host machines are redirected, or reflected, from the victim hosts to the target. Usually they also elicit an amplified amount of attack traffic. Why do attackers like DrDoS attacks? Anonymity is one advantage of the DrDoS attack method. In a DrDoS attack, the target site appears to be attacked by the victim servers, not the actual attacker. This approach is called spoofing. It involves faking the source of the request.
Amplification is another advantage of the DrDoS attack method. What Internet protocols are used in DrDoS attacks? DDoS attackers have been abusing the following protocols on Internet-exposed devices and servers to launch attacks that generate floods of traffic and cause website and network outages at enterprise targets: Character Generator Protocol CHARGEN intended for network testing and debugging.
How does a DrDoS attack work? In Figure 1, a malicious actor is shown making a DrDoS attack. The malicious actor makes it appear to a victim host server that the primary target is contacting them with a request. The victim host servers therefore respond back to the target, which they mistakenly think made the initial request a spoof.
The reflected denial of service attack is called distributed because of the involvement of multiple victim host servers. The attacker may be a single actor or multiple actors. What is a malicious actor? The originating source of spoofed requests that generate the DrDoS attack traffic. The bad guy. What is a victim in a DrDoS attack? The victim is not the ultimate target, but just a resource for the attacker to abuse. By unwittingly participating in the attack, however, the victim server or device can be overwhelmed, reducing its ability to respond to legitimate communications from other users.
What is the target in a DrDoS attack? The final destination of the attack traffic is the target. What is spoofing?
什么是 DDoS 攻击？
Starting in , there was a significant increase in the use of a specific distributed denial of service DDoS methodology known as DrDoS. The technique shows no signs of obsolescence; it continues to grow in effectiveness and popularity. Requests to the victim host machines are redirected, or reflected, from the victim hosts to the target. Usually they also elicit an amplified amount of attack traffic. Why do attackers like DrDoS attacks?
DDoS Attack Definitions - DDoSPedia
The result is the same, but because of the variety of resources, the attack is a bit more complex to block. Applicative DDoS and DoS attacks, however, usually target a website one of whose pages takes a long time to load for example, the one dealing with the indexation of a product catalogue, a Webservice method requiring a lot of resources or, simply, a highly charged functionally checkout page. By calling this page several times per minute, it becomes quite easily possible, without a lot of machines, to block the targeted website. Where do D DoS come from?