Like any system some regular maintenance will keep NMIS running smoothly, we have automated as much as we can and will continue to do so, here are a few things to check on.
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Check and Audit the configuration
Ensure that DNS or host name changes reach the relevant parties
As NMIS mostly runs periodically, out of cron, changes to your infrastructure outside of NMIS are usually picked up automatically. There is, however, one exception:
fpingd.pl runs persistently and permanently (to minimize reaction time). NMIS starts
fpingd.pl if there is none running and then leaves it to its own devices.
As a consequence, if you make changes to your DNS infrastructure or rename hosts, then it's necessary to notify
fpingd.pl of those changes: simply run
/usr/local/nmis8/bin/fpingd.pl restart=true after you've made your changes.
Please note that
fpingd.pl caches information heavily, so restarting it very frequently is counterproductive.
Log rotation is the most important factor