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Those are the IP address used by PlayFab API service. PlayFab Multiplayer Server instance has its own IP address which is allocated by the MPS service. You can get it with API GetMatch or RequestMultiplayerServer.
Yes, but it would be nice to not expose some of my backend services to the entire internet and instead restrict them to the CIDR block(s) allocated for the multiplayer servers, if one exists. With the PlayFab API there is the list of static IPs which I can add rules for.
Your MPS instance's info will not be exposed to others. If the instance was allocated via Matchmaking, only the players who were matched this time has access to this info. In the case of a server instance activated via the RequestMultiplayerServer API, only the requester knows this info.
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