Made a backup of my 7.402 configuration and restored it in 7.5 beta. During restore the webinterface froze and I had to reconnect to browser. It could have been the password, but since I use the same password it shouldn't be.
After restore ALL computer are denied access to internet. Have tried two times but same error. Restore to 7.402 version works perfect...
EDIT: Forgot I had to upgrade to 7.403 and then backup, since it's not possible to restore from 7.402 to 7.5 beta.