Check host alive- distributed server

[Joe Leone]

Hi list.
 I sent a request some time ago (to the NetSaint list) regarding distributed serves and checking if the host is alive, but did not get any responses. I will ask again in the hope that some can respond.  

I have set up a distributed server to monitor hosts behind a firewall.  As such the Central NetSaint server does not have access to them.  i.e. it can not ping them. The distributed server is behind the firewall and I have setup nrpep and nsca to monitor the hosts. I want to implement a "check host alive" to reduce the number of emails.  I have looked at the nagios doco and it seems to indicate it can be done with some fiddling.  Has anyone got it working or offer suggestions?


NAGIOS documentation
Performing Host Checks 
At this point you know how to obtain service check results passivly from distributed servers. This means that the central server is not actively checking services on its own. But what about host checks? You still need to do them, so how? 
Since host checks usually compromise a small part of monitoring activity (they aren't done unless absolutely necessary), I'd recommend that you perform host checks actively from the central server. That means that you define host checks on the central server the same way that you do on the distributed servers (and the same way you would in a normal, non-distributed setup). 
There are ways to obtain host checks passively, but implementing them is beyond the scope of what I care to write about at this time. :-) 


Thanks Joe Leone
Joe.Leone at beacon.com.au





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