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NRPE is a common easy to use option for monitoring remote machines from Nagios or Icinga. Unfortunately NRPE, with **out of the box setup,* is not what I would consider secure.*

This tutorial looks at how you can secure your NRPE traffic by using NSClient++ both as a client and server (yes it runs on Linux as well) in conjunction with SSL certificates to provide certificate based authentication.

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Stateful scripts are a simple yet powerfully way to enhance your monitoring which I think is used far to little. Using stateful script you can easily add simple predictions and change management. This is very easy to accomplished using NSClient++ as its built-in scripting modules by default provides stateful scripts (in contrast to Nagios and Icinga which tends to be stateless). This tutorial will walk you through writing a simple stateful script in Lua. If you are still confused about stateful scripts the main benefit is that they remember things. Thus you can alert when something changes as well as predict the future. A good example of this is disk growth prediction but there are a lot of other scenarios where they are useful.

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Time for yet another tutorial this time detailing how to monitoring log files both event log and regular text files. The event log parts will build a bit on the earlier posts on monitoring the event log but since the “event log cache” feature has been replaced by the generic SimpleCache in 0.4.1 as well as 0.4.1 introducing a new SimpleFileWriter module as well  I felt it was time to re-visit this topic.

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On OSMC 2012 I presented NSClient++ 0.4.1 not really presenting new features as such but more focusing on how to use the new version of NSClient++. In addition to explain various parts of the new Agent I did some demos which of course does not show very well in the slides so here I have presented the demos in a bit more details. I have also, in the slides, elaborated a bit more to at least give the commands I used. Slides can be found here.

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As always Netways arranged for the yearly Open Source Monitoring Conference in Nürenburg.  As always I was suckered into coming.

I had originally planned not to come but alas since my planned vacation was postponed I decided on going. This is a short review of the sessions I attended and my impressions of the conference as a whole.

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Take your monitoring to the next level by creating self-resetting event log checks. Sometimes it is not only faults which can be harvested from the windows event log many applications will also report a message when the state returns to normal. This tutorial show you how to configure NSClient++ 0.4.1 to setup auto resetting event log checks. In addition to using passive checks via NSCA I will also demonstrate how to use the Cache module to benefit from real time event log checks via NRPE.