You can configure networks and security group rules to allow access to an Internet Small Computer System Interface (iSCSI) gateway over a classic network and across virtual private clouds (VPCs).
iSCSI gateways deployed on Alibaba Cloud
To access an iSCSI gateway deployed on Alibaba Cloud from an Elastic Compute Service (ECS) instance over a classic network, you can use the ClassicLink feature of VPC to connect the ECS instance with Cloud Storage Gateway (CSG). For more information, see Use ClassicLink to connect a classic network to a CSG instance.
To use an ECS instance deployed on a VPC to access an iSCSI gateway deployed on another VPC, use Express Connect or Cloud Enterprise Network. For more information, see Use Express Connect to connect ECS instances to a CSG instance and Use CEN to connect ECS instances to a CSG instance.