Cloud Firewall is a network security product tailored by the Alibaba Cloud Security team for cloud users. With the advantages of easy deployment and smooth scaling, it integrates functions such as access control, business isolation, and traffic identification.

Cloud Firewall mainly consists of the following two control modules:

  • North-south traffic control module: controls the access traffic from the Internet to your ECS instances. This module controls the access traffic through layer 4 to layer 7.
  • East-west traffic control module: controls the access traffic between ECS instances through security groups. This module controls the access traffic through layer4.