Alibaba Cloud Anti-DDoS Premium can be used only when the origin site IP address is in Alibaba Cloud.
When applying for an SSL certificate through Alibaba Cloud's SSL Certificates Service, there is an offline review process which can take 3-5 business days or 5-7 business days depending on the type of certificate you have applied for:
Alibaba Cloud Security Center Agent is installed in ECS instances by default, no need to install it manually Users can detach Security Center Agent at any time they desire.
Alibaba Cloud Anti-DDoS Premium Service can be used to protect against DDoS attacks larger than 100 Gbps. It can be used to protect both Alibaba Cloud hosts and non-Alibaba Cloud hosts
Alibaba Cloud's CloudMonitor can not only monitor ECS instances in a secure and efficient way, but also monitor HTTP sites of clients' servers in data centers However, in the latter case, Alibaba Cloud does not provide monitor agent so users need to develop their own scripts to collect data