20.2 Installing and Configuring the Additional Services
In contrast to the WMI approach, the additional services NSClient, NS-Client++, OpMon Agent, and NC_Net must be installed on every single Windows server.
20.2.1 NSClient
NSClient, as the oldest package, has been widely tested and is in widespread use, but it is no longer being actively developed. The last current version is from October 2003; the package can be downloaded from the Nagios Exchange.[231]. It also runs in Windows NT, Windows 2000 and Windows XP.
For Windows 2003, in particular Windows 2003 R2, the original package is no longer suitable, because numerous error messages in the form
PDH.dll Collect CPU - ERROR:...
land in the event log, which lengthens the execution time considerably. ...
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