We are doing some mobile app development involving Google’s Firebase Cloud Messaging (FCM); we’ve noticed that inbound push notifications aren’t coming through and I am suspecting they are getting blocked by our Sophos XG firewall. I’ve read where ports 8253 and 5228 need to be opened up, but I don’t know much more than that. I am looking for suggestions on how best to accommodate my developers.
Thanks in advance!
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