3 basic points: deal with Distributed Denial of Service (DDoS) attacks

3 basic points: deal with Distributed Denial of Service (DDoS) attacks

 

Distributed Denial of Service (DDoS) attacks are prevalent around the world, such as online banking, e-commerce, and official websites ...... No matter what kind of service is facing its threat. The main reason for DDoS flooding is that the cost for implementing it is very low. Fortunately, we now have a variety of defense methods to cope with attacks.

DDoS attacks aim to prevent the target website from providing access to its users. An attacker builds a botnet composed of a large number of computers and uses it to continuously access the target website. When the traffic reaches a certain level, the target website cannot provide services for normal users, or even completely paralyzed.

This security lecture introduces three basic methods to cope with DDoS attacks.

1. Use more bandwidth

This is the easiest way to solve many small-scale DDoS attacks. If you have multiple website servers, you can use the Server Load balancer device to evenly distribute the bandwidth. In this way, traffic from small-scale DDoS attacks will be diverted and bandwidth congestion will not be caused. However, more bandwidth requires more costs, and the scale of DDoS attacks is constantly increasing, which will eventually make enterprises unable to afford it. A good solution is to negotiate with the ISP to temporarily increase bandwidth when a DDoS attack occurs. To reduce the bandwidth cost.

2. Select the DDoS buffer Service

Some ISPs provide defense against large-scale DDoS attacks and buffer networks, automated response tools, and specialized anti-DDoS technical engineers. With these resources, you can take corresponding protection actions based on different types of DDoS attacks. Another feasible solution is to use anti-DDoS products. Currently, domestic products and services are mature.

3. restrict network connections

Using a vro or firewall to restrict network connections is a good method. For example, only the maximum number of connections of an IP address is allowed. You can also use the firewall to restrict access ports. You can also restrict access by only authorized users and IP addresses with some malicious access characteristics.