In data passthrough mode, your cluster's data flows through Pixie's control cloud via a reverse proxy as encrypted traffic without any persistence. This allows users to access data without being in the same VPC/network and is the default mode for Pixie. The admin page of Pixie's Live UI, will show your cluster's mode as "Passthrough".
In data isolation mode, the browser directly proxies into Pixie's Vizier module in your cluster. To see data in the Live UI, you must be behind your cluster's firewall.
To configure your cluster to use Data Isolation Mode, use Pixie's CLI tool to
px get viziers
px config -c <YOUR_CLUSTER_ID> --update --passthrough=false
The admin page of Pixie's Live UI, now shows the cluster's mode as "Direct".