We are having an issue with the app store not opening on some Macbooks and iPads. It appeared to be related to Mojave, but some iPads are having issue too. It says Cannot Connect to App Store. After some troubleshooting, it appears that the app store is using Akamai servers for the content. I did a packet capture and there was traffic trying to get to the some IP addresses in the 23.x.x.x range. Although our filter says the traffic was allowed, the firewall packet capture shows it getting denied. As a test I created a firewall rule to allow any traffic going to 23.0.0.0/8 (Where Akamai Resides) and it fixed the issue. Now I don’t want to allow that whole CIDR block. Any thoughts on what changed? The strange part is that it is not happening to all devices, just a few.
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