More and more people are using VPS hosts to build websites, but compared with virtual hosts or managed servers, personal VPS hosts are basically unmanaged. That is, the host provider is only responsible for the smooth network of the VPS host. As for technical issues You have to figure it out on your own. In the past, the VPS hosts used by Alibaba Cloud were often attacked by CC and DDOS. Basically, every time they were attacked, they would enter Alibaba Cloud's "black hole".