Hi, Just for improvement purpose for perhaps in the next 1.0 release? You'll be carefull that subnet could be CIDR (and no more Class A,B,C... networks) and so mask could be very different than 255.255.x.y. For exemple we use 10.128.0.0/21 so mask is not 255.255.0.0 but 255.255.248.0 serge