Currently the quiz subnet specification does not allow you to specify a subset of IP addresses, for example, from
188.8.131.52 through 184.108.40.206. This functionality is necessary in order to specify all of the computers in a specific classroom, since other classrooms often contain addresses that are a continuation of the range in the previous classroom.
I have modified the code for the function in moodlelib.php that handles the IP subnet verification
function address_in_subnet($addr, $subnetstr)
so that ranges can be handled by specifying the string as:
The code, based on 1.5.4+ is in the attachment, subnet.txt