Make sure your IT department opens these URL’s and ports for streaming and playback permissions

rtmp://global-live.mux.com:5222/app
Port 5222 outgoing

*.jwpcdn.com
*.jwplayer.com
*.jwplatform.com
*.jwpsrv.com
*.jwpltx.com
jwpsrv-vh.akamaihd.net
rtmps://global-live.mux.com/app

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