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I've got a problem. I have a few external servers that need monitoring by Nagios, but they are in remote VPN networks. I must send monitoring data from vpn's host to Nagios who is working on public server, but I cant connect to any VPN.

My idea is sending the data form hosts to database on Nagios localhost server, and read it to monitoring services values.

My question is; how define hosts without real connection do so Nagios do not not spoke "Host is down" or something like this. For this moment I change IP value on 127.0.0.1 for each from external server - and host is UP and on nagios information website and I can add next services for each and read status from local database but is better solution for this ? I just want to add a host without an Ip address and running service in local environment - read from local database.

Katherine Villyard
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bulimaster
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2 Answers2

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You're probably looking for passive checks.

To quote from the linked page:

Passive checks are useful for monitoring services that are:

  • Asynchronous in nature and cannot be monitored effectively by polling their status on a regularly scheduled basis
  • Located behind a firewall and cannot be checked actively from the monitoring host

Passive checks basically do what you're asking: they send the information to Nagios, even behind a firewall or on a network where Nagios can't track.

Katherine Villyard
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To complete the response of Katherine :

I just want to add a host without an Ip address and running service in local environment - read from local database.

You can use check_dummy for the polling of your hosts. This command will always respond OK to Nagios. Like this, your host will be always UP.

Sorcha
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