Vpc peering

Basics

• VPC Peering creates a direct encrypted network link between two and only two VPCs
• Peering connections can be created between VPCs in same region or different regions or even different accounts
• While creating the Peering, one can configure public hostnames to be resolved to private IP address
• VPCs that are in same region then they can reference peer Security Groups.
• VPC peering does not support transitive peering
• VPC peering essentially creates logical gateway objects inside both the VPCs
• Routing is needed to be configured for SGs & NACLs
• Peered VPCs can not have overlapping CIDRs