Seu dhcpd provavelmente precisa de acesso de gravação ao arquivo de concessões.
De link :
When dhcpd is first installed, there is no lease database. However, dhcpd requires that a lease database be present before it will start. To make the initial lease database, just create an empty file called
/var/lib/dhcp3/dhcpd.leases
. You can do this with:
touch /var/lib/dhcp3/dhcpd.leases
Isso deve resolver seu problema.