The further DHCP settings can be achieved at the
Network
menu, at the
DHCP and DNS
item,
General Settings
tab.
At the
Active DHCP Leases
part you can see the list of the devices, which given their IP addresses
from the router’s DHCP service (with the renewal
lease time).
In the
Static Leases
part you can
devices to always provide the same dedicated IP address
by the router.