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Does DCS Support Cross-VPC Access?

Cross-VPC means the client and the instance are not in the same VPC.

The following assumes that public access is disabled for a DCS instance. Generally, VPCs are isolated from each other and an ECS cannot access a DCS instance that belongs to a different VPC from the ECS.

However, by establishing VPC peering connections between VPCs, an ECS can access a DCS instance across VPCs.

When using VPC peering connections to access DCS instances across VPCs, adhere to the following rules:

  • If CIDR Blocks 172.16.0.0/12 to 172.16.0.0/24 are used during DCS instance creation, the client cannot be in any of the following CIDR Blocks: 192.168.1.0/24, 192.168.2.0/24, and 192.168.3.0/24.
  • If CIDR Blocks 192.168.0.0/16 to 192.168.0.0/24 are used during DCS instance creation, the client cannot be in any of the following CIDR Blocks: 172.31.1.0/24, 172.31.2.0/24, and 172.31.3.0/24.
  • If CIDR Blocks 10.0.0.0/8 to 10.0.0.0/24 are used during DCS instance creation, the client cannot be in any of the following CIDR Blocks: 172.31.1.0/24, 172.31.2.0/24, and 172.31.3.0/24.

For more information on how to create and use VPC peering connections, see VPC Peering Connection.