DHCP Server Checker

This python script checks whether it is able to acqiure an IP as a relay server.

It is written in pure python3 and has no external dependencies. It should therefore run on any system with python3 (untested).

Requirements

Python3

Needs to be run as root

Usage

usage: check_dhcp_relay [-h] -H HOST -r RELAY -n NETWORK -m MASK [-t TIMEOUT]
                        [-l LISTEN] [-c MAC] [--no-release] [--verbose]

Example:

$ check_dhcp_relay -H 192.168.1.1 -r 192.168.1.10 -n 192.168.2.0 -m 255.255.255.0
DHCP OK | responsetime=0.01ms

Nagios/Icinga 1.x config

# 'check_dhcp_relay' command definition
define command {
        command_name    check_dhcp_relay
        command_line    sudo /usr/lib/nagios/plugins/check_dhcp_relay -H '$HOSTADDRESS$' -r $ARG1$ -n $ARG2$ -m $ARG3$
}