Hi I received my MAG250 today but get the authentication error all the time.
I got a working IKS66 route (worked on KODI).

Here's what I did:

Updated to new Firmware first (0.2.18-r14-250)
Settings - Server - Portals: http://66.iptv66.tv (Portal 1 name: IKS)
Settings - Server - General: NTPserver: pool.ntp.org

Device info: MAC Adress: starts with 00:1A:79:xx xx xx
> on route checker with IKS, I entered the MAC as 00:1A:78: xx xx xx

Then reboot the device >> Loading > Authentication:
enter my route Nr (without typos) as Username an Password and click OK > Error

Unplug device, go to IKS an reset IPTV.
Plug device in, booting up: Authentication fields: enter route again as user and pass, press OK > Error.

What can I do to get it running?
Is the device MAC starting with 00:1A:79: the problem ?
Do I need to enter the 00:1A:79:xxxxxx on IKS or (as I did) 00:1A:78:xx xx xx

All I get is a blue screen with the "Authentication" prompt.
Any help is appreciated!
Thanks !