Sun, 03 Sep 2006
Open Ports Nagios Check
A machine should run a defined set of ports, if any of them are not
listening you've got a problem. If any others are open then you've
potentially got an even bigger problem. The Check Open
Ports Nagios Check accepts a list of IPv4 TCP and UDP ports and
reports if any of the expected ones go away or any others are detected
as listening.
This also partially scratches one of my own itches, I've had a couple of daemons (MySQL in particular) start after a package upgrade without my knowing it. With this script and a little cron it won't happen again. It's probably worth mentioning that while this script is built to run within Nagios it will work stand-alone.
Note: this script is more for detecting misconfigurations than for
security. Most root kits mask the ports they've opened so they won't appear
through netstat, which this command uses.
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Posted: 2006/09/03 11:56 | /tools/commandline | Permanent link to this entry | This entry and same date
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