If you have any Amazon Echo devices (Dot, Show, etc) and use Diversion and/or Skynet, then you will need to whitelist the following to prevent the Echo/Echo Dot devices from rebooting frequently (Echo Show displays error) because it can't connect to Amazon Server (it appears to be an NTP server used by the Echo devices).
Diversion
Whitelist the following domain, then use option to process whitelist:
	
	
	
		Code:
	
	
		device-metrics-us-2.amazon.com
	 
 
Skynet
Whitelist the following IP address, then use option to process whitelist:
	
	
	
		Code:
	
	
		158.69.35.227  << Now used as an Amazon NTP Server
	 
 
		 
Here is my highly effective and comprehensive amazon whitelist.....
aan.amazon-adsystem.com   
aan.amazon.com   
aax-eu.amazon-adsystem.com   
aax-us-east.amazon-adsystem.com   
aax-us-pdx.amazon-adsystem.com   
aax.amazon-adsystem.com   
amazon.co.uk   
amazon.com   
amazon.in   
amazonaws.com
c.amazon-adsystem.com   
cognito-identity.us-east-1.amazonaws.com   
completion.amazon.co.uk   
dcs-edge-va6-802167536.us-east-1.elb.amazonaws.com   
det-ta-g7g.amazon.com   
device-messaging-na.amazon.com   
device-metrics-us-2.amazon.com   
device-metrics-us.amazon.com   
dp-discovery-na-ext.amazon.com   
fls-eu.amazon.com
fls-eu.amazon.de   
fls-na.amazon-adsystem.com   
fls-na.amazon.com   
images-na.ssl-images-amazon.com   
ir-na.amazon-adsystem.com   
ir-uk.amazon-adsystem.com   
kinesis.us-east-1.amazonaws.com   
mads.amazon-adsystem.com   
mads.amazon.com   
mas-sdk.amazon.com
msh.amazon.com   
ocsp.rootg2.amazontrust.com   
ocsp.sca1b.amazontrust.com   
s.amazon-adsystem.com   
s3-ap-southeast-1.amazonaws.com   
s3-eu-west-1.amazonaws.com   
s3-us-west-2.amazonaws.com   
s3.amazonaws.com   
s3.ap-northeast-2.amazonaws.com   
s3.ap-south-1.amazonaws.com
smile.amazon.com   
spectrum.s3.amazonaws.com   
sqs.us-east-1.amazonaws.com   
todo-ta-g7g.amazon.com   
unagi-na.amazon.com   
unagi.amazon.com   
us-east-1.amazonaws.com   
wms-eu.amazon-adsystem.com   
wms-na.amazon-adsystem.com   
wms-na.assoc-amazon.com
ws-eu.amazon-adsystem.com   
ws-na.amazon-adsystem.com   
z-na.amazon-adsystem.com
pinpoint.us-east-1.amazonaws.com
mobileanalytics.us-east-1.amazonaws.com
aax-us-iad.amazon.com
aax-us.amazon-adsystem.com
cloudfront-labs.amazonaws.com
s3-ap-northeast-1.amazonaws.com
amazoncustomerservice.d2.sc.omtrdc.net