Noticing that the iPhone MAC address different on router than what is displayed in Settings can be a confusing experience. When randomization is active, the Source Address field will contain the spoofed value rather than the burned-in address.
Understanding iPhone MAC Address Randomization in Router Logs
If you have configured your router to allow only specific devices based on their hardware addresses, the randomization feature will cause an iPhone to appear as an unauthorized device. This change ensures that network appliances see the true hardware address consistently.
This hardware address is typically burned into the device during manufacturing and serves as a global unicast address. This defense mechanism protects against location profiling and targeted advertising based on physical movement.
Understanding iPhone MAC Address Randomization in Router Logs
Instead of sending the actual hardware address to every network it scans, the iPhone generates a random, temporary MAC address for probe requests when searching for available Wi-Fi networks. It is a static fingerprint that does not change based on the network you join or the settings you adjust within the iOS operating system.
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