So there's ip-range whitelist support, great!

I have a dynamic ip within range: a.b.c.e-a.b.f.g (witt defined constants abcdefg).
But for some reason I get "Invalid list of ip addresses".

What is the correct syntax?

Also the errormessage appears inside the inputbox, scrambled with and on top of the specified range, and will translate to the "correct" place after some clicks on the page.

EDIT:oops got all my sentences mixed up during copypaste, fixed.