What is a DDoS attack?

Published: 2019-01-30

1. What is a DDoS attack?

DDoS is the common name for Distributed Denial of Service. DDoS originally uses reasonable requests to forge resource overload, causing service unavailability.

A Distributed Denial of Service (DDoS) attack refers to using client/server technology to unite multiple computers as an attack platform and launch DDoS attacks on one or more targets, thereby multiplying the power of denial-of-service attacks. Here it mainly refers to "bandwidth-consuming" DDoS attacks.

2. Why is a server suspended by the data center when it suffers a DDoS attack?

A DDoS attack not only affects the user's network, but also causes a serious impact on the entire data center network. If the network of the attacked server is not blocked, it may cause network interruptions for cloud servers of other users in the same data center, bringing huge losses;

3. Why does it not show in the client-side bandwidth monitoring after suffering a DDoS attack?

A DDoS attack will generate a large amount of traffic flooding toward the data center in a short time, just like a sudden mountain flood bursting and pouring in. Before the traffic reaches the user side, it has already caused network congestion, so the user-side bandwidth monitoring cannot show it. Only the data center's firewall side can see the traffic.

4. What kind of sites are prone to DDoS attacks?

Based on past experience and summary/analysis of the types of attacked websites, sites with content such as "specialty hospitals," "beauty hospitals," and "online games" are generally prone to DDoS attacks. Second, malicious competition among peers may also lead to malicious attacks.

5. Can the source IP of a DDoS attack be found?

It is very difficult to trace the attacker's real IP in a DDoS attack. Attackers generally use a large number of "zombie machines" to launch attacks. The attack source IPs recorded in the firewall are the IPs of a large number of "zombie machines"; the attacker's IP cannot be obtained.

6. How can DDoS attacks be avoided?

Because DDoS attacks are covert, no very good solution to DDoS attacks has been found so far; the only option is to increase protection.

You can consider purchasing a cloud server from our company's high-defense data center https://www.west.cn/cloudhost/gaofang.asp or a dedicated high-defense service https://www.west.cn/cloudhost/ddos.asp . High-defense service (high-defense data center) adds a hardware firewall at the entrance, which filters and intercepts request packets and has stronger protection capabilities.

Or consider using third-party protection services such as cloudflare, 百度云加速, etc.