What does DDOS mean when we see it?

DDoS is a form of cyber attack.

DDoS is a distributed denial-of-service attack.

Distributed denial of service attacks can make many computers suffer attacks at the same time, so that the target of the attack can not be used normally, distributed denial of service attacks have appeared many times, resulting in a lot of large-scale ** can not be operated, which will not only affect the normal use of users, but also cause economic losses are very huge.

The distributed denial-of-service attack method can forge the source IP address when the attack is carried out, so that the attack is very concealed when it occurs, and it is also very difficult to detect the attack, so this attack method has become a very difficult attack to prevent.

Related information

Knowing the target of an attack is about having a comprehensive and accurate understanding of what you are going to attack, so that you know what to do in the future. The main concerns include the number of hosts and the address of the target. The configuration of the target host, the performance, the bandwidth of the target, and so on.

For a DDoS attacker, attacking a site on the Internet.

One important thing is to determine exactly how many hosts are supporting the site, and a large ** may have many hosts that utilize load balancing technology to provide services. All of these attack target information are related to the implementation goals and strategies of the next two stages, if you blindly launch a DDoS attack, you cannot guarantee the completion of the attack purpose, and it may also expose the identity of the attacker prematurely, so understanding the attack target is a necessary step for an experienced attacker.

What does DDoS attack mean? Do you know?

DDoS is a distributed denial-of-service attack.

Distributed denial-of-service attacks (DDoS) are a common and difficult attack vector used by hackers to prevent them. There are many ways to attack DOS, and the most basic DOS attack is to use reasonable service requests to occupy too many service resources, so that legitimate users cannot get a response from the service.

DDoS attacks are a type of attack based on traditional DoS attacks. A single DoS attack is generally a one-to-one approach, and its effect is obvious when the target CPU speed is low, the memory is small, or the network bandwidth is not high.

A distributed denial-of-service attack (DBS) attack is a distributed denial-of-service attack (DDOS) attack, in which a large number of "broilers" are used to launch a large number of normal or abnormal requests to the target and exhaust the target host resources or network resources, so that the attacked host cannot provide services to legitimate users.

The nature of DDoS attacks

Famous events

In 2009, the 519 network outage incident caused all the operator servers in the six southern provinces to collapse, and the network of China Telecom in the six southern provinces was basically paralyzed.

In July 2009, South Korea was hit by three rounds of fierce DDoS attacks in three days, and South Korea announced the early establishment of a cyber command.

Protection against DDoS attacks

Shut down unnecessary services and ports; Limit the number of SYN semi-connections that can be opened at the same time; Reduce the timeout time of SYN semi-connection; Install system patches in a timely manner; Disable access to host's non-open services; Enable the firewall anti-DDoS attribute. In addition, you can also install the corresponding protection software, here it is recommended to install the security dog software. Protection is good, and it's free.