Alibaba Cloud WAF cannot protect against large traffic DDoS attacks which can be solved by Alibaba Cloud Ant-DDoS Service.
If a user has multiple ECS instances on Alibaba Cloud but has no professional O&M team or is unwilling to put efforts in O&M, the user can activate Alibaba Cloud Security Center which provides security expert services like manual security checking, Trojan removing and hosted service monitoring.
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.