EPM Automate - copySnapshotFromInstance - Firewall Issue

Summary

Getting Error - EPMAT-1:Login to source instance - Invalid Credentials.

Content

All, 

I am attempting to use copySnapshotFromInstance command but the command is failing with an error

EPMAT-1:Login to source instance https://fccs-aXXXXX.epm.us2.oraclecloud.com/epmcloud failed. Invalid credentials

Oracle support says its a firewall issue, but couldn't help much with the IPs to be whitelisted. 

As you can see the target pod is in US6 datacenter, and the source pod is US2. So I whitelisted the source and target datacenter CIDRs in the respective PODs ( source IPs in target  pod and vice versa) .

Source CIDR - 160.34.15.48/29