Security Group

Security Group acts as a firewall to help you control traffic going in and out of the server (VM). On the VKS system, to ensure the cluster operates safely and effectively, default Security Groups are set up to allow necessary access for the cluster's internal operations. Automatically creating a Security Group simplifies the cluster deployment process and ensures that the cluster is protected from the start. Specifically, when you initialize a Cluser, we will automatically create several Security Groups with the following parameters:

The default security group is automatically created for all Clusters

For each Cluster created in the VKS system, we will automatically create a Security Group. This security group will include:

• Inbound:

Protocol	Ether type	Port range	Source	Meaning
TCP	IPv4	30000-32767	CIDR of the VPC you use for the Cluster.	Security group rule used for TCP Node Port Services
UDP	IPv4	30000-32767	CIDR of the VPC you use for the Cluster.	Security group rule used for UDP Node Port Services
TCP	IPv4	10250	External IP of Load Balancer used for Cluster.	Security group rule used for Kubelet API control-plane
TCP	IPv4	10250	CIDR of the VPC you use for the Cluster.	Security group rule used for Kubelet API control-plane
TCP	IPv4	179	CIDR of the VPC you use for the Cluster.	Security group rule used for Kubelet API control-plane
4	IPv4	1-65535	CIDR of the VPC you use for the Cluster.	Security group rule used for Calico IP-in-IP
TCP	IPv4	5473	CIDR of the VPC you use for the Cluster.	Security group rule used for Calico Typha

• Outbound

Protocol	Ether type	Port range	Destination	Meaning
ANY	IPv4	0-65535	0.0.0.0/0	Default rule of all Security groups
ANY	IPv6	0-65535	::/0	Default rule of all Security groups

Security group is automatically created by VNGCLOUD LoadBalancer Controller

When you use GreenNode LoadBalancer Controller to integrate Network Load Balancer with Cluster on VKS system, we will automatically create a Security Group. This security group will include:

• Inbound:

Protocol	Ether type	Port range	Source
TCP, UDP or ICMP	IPv4	Port of Service	Subnet Mask of the Subnet you use for the Cluster.

• Outbound:

Protocol	Ether type	Port range	Destination	Meaning
ANY	IPv4	0-65535	0.0.0.0/0	Default rule of all Security groups
ANY	IPv6	0-65535	::/0	Default rule of all Security groups

Security group is automatically created by VNGCLOUD LoadBalancer Controller

When you use GreenNode LoadBalancer Controller to integrate Application Load Balancer with Cluster on VKS system, we will automatically create a Security Group. This security group will include:

• Inbound:

Protocol	Ether type	Port range	Source
TCP	IPv4	Port of Service	Subnet Mask of the Subnet you use for the Cluster.

• Outbound:

Protocol	Ether type	Port range	Destination	Meaning
ANY	IPv4	0-65535	0.0.0.0/0	Default rule of all Security groups
ANY	IPv6	0-65535	::/0	Default rule of all Security groups

Attention:

• Default Security Groups are set up to meet the basic security needs of the cluster. If you edit or delete the Security Groups created for the cluster, it may result in connectivity and access issues between nodes in the cluster or the cluster may not function correctly or may not even start. To ensure the stability and security of the cluster, the system will automatically reset Security Groups to default settings after every fixed period of time.