Nagios Support Forum

I added an unmodified DHCP test on my localhost and get the status "CRITICAL: No DHCPOFFERs were received." As far as I know, DHCP is actually working, or my laptops would fail to get IPs assigned when they connect to my wireless network. What can I look at to find the cause of this apparently incorrect status (or is it really correct and I need to fix my DHCP?)?

Have you modified your apache or firewall configuration to differ from default settings prior to installing nagios? Checks for the localhost should work right out of the box on a fresh linux and nagios install.