Installation and setup

1. Install the DHCP server package:

    sudo apt install isc-dhcp-server

2. Configure the file
   After installation edit the file /etc/dhcp/dhcpd.conf and confirm the following:

    ddns-update-style none;
   
    #option domain-name "example.org";
    #option domain-name-servers ns1.example.org, ns2.example.org;
   
    # define in seconds
    default-lease-time 3600;
    max-lease-time 10800;
   
    #  Primary, single network DHCP
    authoritative;
   
    subnet 192.168.28.0 netmask 255.255.255.0 {
    range 192.168.28.100 192.168.28.254;
    option domain-name-servers 192.168.28.1;
    option routers 192.168.28.1;
    }

   And finally edit the file /etc/default /isc-dhcp-server

    # network card for use by DHCP server
    INTERFACES="enp0s8"

   Start the service:

    sudo service isc-dhcp-server start

3. Assign a fixed IP through DHCP (optional)
   Edit the file /etc/dhcp/dhcpd.conf and add the following:
   host OPcDaDiana {
   hardware ethernet 08:00:27:F4:2C:CA;
   fixed-address 192.168.28.10;
   }

Whenever configuration changes are made, the service must be restarted:

service isc-dhcp-server restart

4. See leases (optional)
   Information on IP “leases” assigned by the server can be found at:

cat /var/lib/dhcp/dhcpd.leases

For more information:
https://help.ubuntu.com/lts/serverguide/dhcp.html

Credits: https://www.carrondo.net

Review and tested by: Cristiano Costa