To monitor DHCP services, the plugin
check_dhcp is available. It sends a
DHCPDISCOVER via UDP broadcast to the target port 67 and waits for an offer from a DHCP server in the form of a
DHCPOFFER, which offers an IP address and further configuration information.
check_dhcp does not send a
DHCPREQUEST after this, the server does not need to reserve the sources and to confirm this reservation with
DHCPACK, nor does it need to reject the request with
There is a further restriction to the
check_dhcp: it requires full access to the network interface and must therefore run with
In order for the user
nagios to be able to ...