Ghost ip detection
We are using DHCP server from our XG firewall. IP leasing setting is 12 hrs. I am looking for some tools from which i can find the ghost IP ( IP which is not active) and clear it up from the DHCP pool in order to assign to new connection.
Secondly I want to know that how can i make a rule that if a device is not authorized to access internet should not get the IP from the DHCP server.