From holger at zedat.fu-berlin.de Sat Apr 1 12:58:13 2017 From: holger at zedat.fu-berlin.de (Holger =?iso-8859-1?Q?Wei=DF?=) Date: Sat, 1 Apr 2017 12:58:13 +0200 Subject: check_icmp with reverse error codes? In-Reply-To: References: Message-ID: <20170401105813.GF101825@zedat.fu-berlin.de> [Such questions should go to the help@ list instead.] * Chris Hicks [2017-03-07 23:46]: > Are you aware of any check_icmp type plugins that return the opposite error > codes, so that it returns an OK is there is no reply, and an error if there > is a reply? I want to monitor my unused static IP addresses so I am alerted > if somebody fires up a machine, which would be good for locking down the > address space for better documentation and security. You could use the negate plugin for this: https://www.monitoring-plugins.org/doc/man/negate.html Holger