Hi Grant, This is probably a configuration issue with your nagios services.cfg file. Where you define your service check for SMTP, make sure the 4 hosts you want to monitor are specified in the "host_name" directive, and that the fifth host is not there. This is independent of your NRPE configs. -Philip <div class="gmail_quote">On Mon, Dec 15, 2008 at 10:59 AM, Grant Lowe <<a href="mailto:glowe@sbcglobal.net">glowe@sbcglobal.net</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Hi All, I have five servers that I want to monitor basic stuff for. I have check for file system usage on /, /usr/, etc. I also check swap space. I want to check SMTP on four of the five servers. But for some reason I can't seem to stop monitoring on the fifth host. It keeps on showing up as connection refused (which it should as I don't have mail enabled on the machine). This is nrpe v 2.10, and server is nagios <a href="http://3.0.3." target="_blank">3.0.3.</a> Any and all help is appreciated! ------------------------------------------------------------------------------ SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at <a href="http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/" target="_blank">http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/</a> _______________________________________________ Nagiosplug-help mailing list <a href="mailto:Nagiosplug-help@lists.sourceforge.net">Nagiosplug-help@lists.sourceforge.net</a> <a href="https://lists.sourceforge.net/lists/listinfo/nagiosplug-help" target="_blank">https://lists.sourceforge.net/lists/listinfo/nagiosplug-help</a> ::: Please include plugins version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null </blockquote></div>