2 Network Guidelines
Since this agent is from a networking perspective connected to both your on-premise Gaming PTS and OPERA Cloud, the machine on which this agent is deployed must have internet outbound connectivity and connectivity to your Gaming PTS. There is no need for internet inbound connection as all interactions between this agent and OPERA Cloud are always from the agent to Oracle's cloud. Never the other way around.
In regards to the on-premise Gaming PTS system, there must be network connectivity between this agent and the PTS system. This does not mean both must reside on the same subnet, but only requires network connectivity between the two.
This connectivity agent should not be deployed on your DMZ.
Depending on your Gaming PTS vendor, the agent either uses port 80 or port 443 and all traffic is done using HTTPS protocol. Contact your Oracle team for further information.