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What is the Best Practice to block iCloud relay?

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What is the Best Practice to block iCloud relay?

phampx
L0 Member

‎10-10-2025 08:10 AM - edited ‎10-10-2025 08:10 AM

What is the best practice method to block iCloud relay without impacting iOS users too much? Apple says to NXDOMAIN the following below. 

mask.icloud.com
mask-h2.icloud.com

Prepare your network or web server for iCloud Private Relay - iCloud - Apple Developer


For the PA though,... should we... create a policy to block, deny or use a URL custom block object rule?

These are some other domains/FQDN I have found:

 

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