Vpc Peering Security Concerns
When a security group rule becomes stale it s not automatically removed from your security group you must manually remove it.
Vpc peering security concerns. You or a network administrator for the peer vpc network can delete a peering configuration. If you have overlapping or matching cidr blocks you need to ensure your routing tables are configured to avoid sending response traffic from your vpc to the incorrect vpc. A stale security group rule is a rule that references a security group in a peer vpc where the vpc peering connection has been deleted or the security group in the peer vpc has been deleted.
If the question is not clear i will be happy to explain my concerns further. When a peering configuration has been deleted the peering connection switches to inactive in the other. Once the two systems are connected through vpc peering will the two machines have unlimited access to each other implicitly or will there be some rules which will govern the privacy of machines within the vpc.
Vpcs in a peering connection must be able to communicate with each other as if they are within the same network to route traffic between them using private ip addresses. I apologize if this question is too trivial.