No one is sure why older Apple devices can bypass modern network protections.
No one is sure why older Apple devices can bypass modern network protections.
I upgraded the 2012 MBP to Catalina and everything functions properly again. It seems the older operating system was somehow handling DNS in a way that bypassed the block. I'm sharing this with the corporate team so they can investigate, as it appears the guest Wi-Fi security issue stems from using an outdated Mac OS.
It’s concerning when systems depend on current OS features to enforce security. This suggests a vulnerability that anyone aiming to breach your guest Wi-Fi could exploit across any operating system, mirroring how older MacOS handled similar issues. For instance, someone might link to your network using its IP address and bypass your DNS servers entirely by routing traffic through it.