When I upgraded my UTM to 9.165, my AP30 stopped working very shortly after the system first rebooted. The light kept blinking, indicating that it was not able to connect to the UTM, and it appeared as unavailable in the WebAdmin. DHCP log showed that the AP was still talking on the network and being given an IP address. At the same time, I was unable to access the Internet through a wired connection to the UTM, and was also unable to ping the UTM's IP address, although I was still able to access WebAdmin.
After trying a bunch of stuff, the thing that finally made the difference was turning off IPS.
Turning it back on causes the AP to fail again.
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