# How Do I Harden the VPC Security Group Rules for CCE Cluster Nodes?

CCE is a universal container platform. Its default security group rules apply to common scenarios. Based on security requirements, you can harden the security group rules set for CCE clusters on the Security Groups page of Network Console.

To view security groups, log in to the CCE console, choose Service List > Network > Virtual Private Cloud, and choose Access Control > Security Groups in the navigation pane.

The security group name of a master node is {Cluster name}-cce-control-{Random ID}. The security group name of a worker node is {Cluster name}-cce-node-{Random ID}.

Enable the following ports in security groups:

For {Cluster name}-cce-control-{Random ID}:

- The source IP addresses defined in the security group rules must be permitted.
- 4789: used for network access between containers.
- 5443 and 5444: ports to which kube-apiserver of the master node listens. The two ports must permit requests from VPC and container CIDR blocks and control plane CIDR blocks of the hosting mesh.
- 9443: used by canal of the node to listen to canal-api of the master node.
- 8445: used by storage_driver of the node to access csms-storagemgr of the master node.

For {Cluster name}-cce-node-{Random ID}:

- The source IP addresses defined in the security group rules must be permitted.
- 4789: used for network access between containers.
- 10250: used by the master node to proactively access kubelet of the node (for example, by running kubectl exec {pod}).
- 30000 to 32767 must permit requests from VPC, container, and ELB CIDR blocks.

Parent topic: Reference