How does the ENI multi-IP solution handle security group configuration?

The ENI (Elastic Network Interface) multi-IP solution allows a single network interface to be assigned multiple private IP addresses, which can improve network flexibility and resource utilization. When it comes to security group configuration, each private IP address associated with the ENI can independently inherit or be assigned specific security group rules.

Security groups act as virtual firewalls to control inbound and outbound traffic. For the ENI multi-IP solution, the following applies:

1. Inherited Security Group: If no specific rules are assigned to individual IPs, all IPs on the ENI share the same security group rules.
2. Independent Rules per IP: Some cloud platforms allow assigning different security groups to each private IP on the ENI, enabling granular traffic control.

For example, in a scenario where an ENI has two private IPs (10.0.0.1 and 10.0.0.2), you can:

• Apply a single security group to both IPs if they require identical access policies.
• Assign separate security groups if one IP needs stricter restrictions (e.g., 10.0.0.1 allows SSH from a specific CIDR, while 10.0.0.2 only permits internal traffic).

On Tencent Cloud, the ENI multi-IP feature supports flexible security group binding. You can configure security groups at the ENI level or assign different security groups to individual IPs, depending on your network security requirements. This ensures precise control over traffic while maintaining high availability and scalability.