I'm running Webmin 1.750 with isc-dhcp-server on my Debian 7 x86 server. Latest updates are applied.
I've configured DHCP range on ISC-DHCPD from 10.84.0.128 to 10.84.1.159, netmask 255.255.254.0.
Based on my calculation, the total of IP addresses is 288.
But when I view DHCP Leases, it shows only 64 addresses: 64 IP addresses available, 22 allocated (34 %)
Is 10.84.0.128 to 10.84.1.159 your subnet address, or the range inside the subnet? Because it is the ranges that Webmin looks at.
Our network is 10.84.0.0/23, the addresses range inside subnet. Please see the configuration below:
Last edit: Ta Xuan Truong 2015-05-29
Ok, I see the bug that causes this - it will be fixed in the next Webmin release.