A security group is an instance-level firewall provided by Tencent Cloud for controlling inbound traffic of TencentDB. You can associate a security group with a cluster when purchasing it or later in the console.
TDSQL-C for MySQL allows you to configure different security groups for the read-write and read-only addresses respectively, which don't affect each other.
- A TDSQL-C for MySQL instance can be associated with up to five security groups.
- You can configure different access addresses with different security groups, which will control only sources that access the current address.
You have created security groups for TencentDB instances in the security group console. For more information, see Configuring Security Group.