In order to get the clover mini device working, I had to allow more destinations than were listed:
216.58.219.104
216.58.219.72
107.155.123.25
216.58.192.104
216.58.219.136
216.58.219.168
216.58.192.72
69.164.214.230
107.155.123.243
Can someone confirm that these destinations are needed for the clover mini to work?