No, I cannot do DNS resolve for every incoming IP (and definitely not in time of DDoS

). Please use domain/dyndns or static IP. Subnets are not yet supported.
If I manage to log into the web interface once during a DDOS then that IP is whitelisted, right?
My IP changes "only" once a day, so if I can get it to log in once, I should be good for that day.