imp
1
Hi there.
I’d love solve this issue.
There is a AccessPoint built on Ubiquiti Rocket M5 which uses backed Radius server.
Please see settings on attached image .
Other Ubiquiti clients are able to connect.
Please see their settings on attached image.
But my Mikrotik is unable to connect because I don’t know how to setup security profile 
Any ideas?
APs log is full of these
Sep 30 17:39:07 hostapd: ath0: STA d4:ca:6d:5b:2f:41 IEEE 802.11: disassociated
Sep 30 17:39:21 wireless: ath0 MLME-AUTH.indication(addr=d4:ca:6d:5b:2f:41)
Sep 30 17:39:21 wireless: ath0 Expired node:D4:CA:6D:5B:2F:41
Sep 30 17:39:21 hostapd: ath0: STA d4:ca:6d:5b:2f:41 IEEE 802.11: disassociated
Sep 30 17:39:35 wireless: ath0 MLME-AUTH.indication(addr=d4:ca:6d:5b:2f:41)
Sep 30 17:39:35 wireless: ath0 Expired node:D4:CA:6D:5B:2F:41
Hi,
You can create a new security profile under Wireless → Security Profiles
The you will need to select the new security profile by Going to Interfaces and double clicking the wireless interface.
Then change the security profile from default to the new one you created.
Hope it helps you.
imp
3
Thank you, I hnow how to create security profile 
But I dont know how to setup created security to fulfill authentication against radius server.
pe1chl
4
This used to be impossible but now it works with MikroTik RouterOS version 6.39