Best Practice for Network Restricted Access Environments
If you configure a set of IP addresses in the network perimeter in IAM, only those IP addresses are allowed to connect to all the environments in that domain. Use this method to set up IP allowlist to limit connections to all the environments managed by an identity domain to a specific set of IP addresses. See Manage Oracle Identity Cloud Service Network Perimeters in Administering Oracle Identity Cloud Service for detailed information on configuring and managing network perimeters.
This condition holds true for navigation flow connections between environments as well. In this case, you have to use the outbound IP address of the source environment in the network perimeter.