<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <HTML> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"> <META NAME="Generator" CONTENT="MS Exchange Server version 6.5.7036.0"> <TITLE>Nagios/NRPE relationship</TITLE> </HEAD> <BODY>  Hi all, hope you do no think this is a stupid question; however I have to ask it anyway for a better understanding. I have my Nagios Server with NRPE plugins installed and I have a Linux Remote Server that I want to monitor, I know that you need NRPE on the remote Linux box but after that it goes a bit glazed, this is the bit I need to understand. Here is the standard configuration NRPE installed on my remote Linux box: command[check_users]=/usr/local/nagios/libexec/check_users -w 5 -c 10 command[check_load]=/usr/local/nagios/libexec/check_load -w 15,10,5 -c 30,25,20 command[check_disk1]=/usr/local/nagios/libexec/check_disk -w 20 -c 10 -p /dev/sda1 command[check_zombie_procs]=/usr/local/nagios/libexec/check_procs -w 5 -c 10 -s Z command[check_total_procs]=/usr/local/nagios/libexec/check_procs -w 150 -c 200 So my question is, if I need to monitor SMTP on the remote box I would have to ask the remote administrator to add the following command to their nrpe.cfg: Command[check_smtp]=/usr/local/nagios/libexec/check_smtp -H localhost Do they have to use the -H localhost directive or is there something different they can use, the localhost just does not seem right looking at the other examples above. Then on my Nagios Server, under the .cfg box I want to monitor I define the command: define service{ use generic-service host_name linux-server service_description SSH check_command check_nrpe!check_ssh } Hope its not such a stupid question that it does not warrant a reply. Rgs Martyn </BODY> </HTML>