<div dir="ltr">try setting the suid for this script</div><div class="gmail_extra"> <div class="gmail_quote">On Tue, May 14, 2013 at 2:59 PM, Deborah Martin <<a href="mailto:Deborah.Martin@kognitio.com" target="_blank">Deborah.Martin@kognitio.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <div lang="EN-GB" link="blue" vlink="purple"> <div> Ok – if I look at your output, manually, when the plugin is run as the “root” user it produces the correct result. But, you haven’t said what the nrpe user is that is running on the remote node and whether the same manual run of the check produces the same output. For example, I run remote plugins through nrpe as the “nagios” user so if I want to manually test a plugin on the remote node, I would first login as the nagios user to ensure I’ve got the same environment that would be used when running via nrpe. It might be that the variables you have set in the script only work as the root user. It’s never a good idea to test as the root user but only as the same user as that used by nagios or nrpe. Regards, Deborah <div> <div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0cm 0cm 0cm"> From: Thilakraj.Shanmugam [mailto:<a href="mailto:Thilakraj.Shanmugam@canberra.edu.au" target="_blank">Thilakraj.Shanmugam@canberra.edu.au</a>] Sent: 14 May 2013 09:58<div><div class="h5"> To: Nagios Users List Subject: Re: [Nagios-users] Nagios Plugin for IPTABLES Monitoring</div></div> </div> </div><div><div class="h5"> Hi Deborah, Thanks for the response.. please find the details below. [root@abc libexec]# pwd /usr/local/nagios/libexec [root@abc libexec]# ./check_iptables.sh <----- Executing manually script + IPT=/sbin/iptables + GREP=/bin/grep + AWK=/bin/awk + EXPR=/usr/bin/expr + WC=/usr/bin/wc + A=/usr/bin/sudo + E_SUCCESS=0 + E_CRITICAL=2 + E_UNKNOWN=3 ++ /usr/bin/sudo /sbin/iptables -nvL ++ /bin/grep Chain ++ /bin/awk '{ print $2 }' ++ /bin/grep Cid ++ /usr/bin/wc -l + CHAINS=5 + '[' 5 -ne 0 ']' + echo 'Firewall is running!' Firewall is running! + exit 0 <------ it shows firewall running ( correct output ) [root@abc libexec]# Client - NRPE config file [root@abc libexec]# cat /usr/local/nagios/etc/nrpe.cfg |grep -i iptable command[check_iptables]=/usr/local/nagios/libexec/check_iptables.sh [root@abc libexec]# [root@abc libexec]# ./check_nrpe -H localhost -c check_iptables Firewall is not running <----- executing via check_nrpe ( wrong output ) [root@abc libexec]# NRPE Logs ------------- May 14 18:52:28 abc nrpe[31158]: Added command[check_Partion_db]=/usr/local/nagios/libexec/check_disk -w 15% -c 5% -p /db May 14 18:52:28 abc nrpe[31158]: Added command[check_Partion_app]=/usr/local/nagios/libexec/check_disk -w 15% -c 5% -p /app May 14 18:52:28 abc nrpe[31158]: Added command[check_iptables]=/usr/local/nagios/libexec/check_iptables.sh May 14 18:52:28 abc nrpe[31158]: INFO: SSL/TLS initialized. All network traffic will be encrypted. May 14 18:52:28 abc nrpe[31158]: Handling the connection... May 14 18:52:28 abc nrpe[31158]: Host is asking for command 'check_iptables' to be run... May 14 18:52:28 abc nrpe[31158]: Running command: /usr/local/nagios/libexec/check_iptables.sh May 14 18:52:28 abc nrpe[31158]: Command completed with return code 2 and output: Firewall is not running May 14 18:52:28 abc nrpe[31158]: Return Code: 2, Output: Firewall is not running Kind Regards, Thilak <div> <div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0cm 0cm 0cm"> From: Deborah Martin [<a href="mailto:Deborah.Martin@kognitio.com" target="_blank">mailto:Deborah.Martin@kognitio.com</a>] Sent: Tuesday, 14 May 2013 6:44 PM To: Nagios Users List Subject: Re: [Nagios-users] Nagios Plugin for IPTABLES Monitoring </div> </div> Hi, What is the wrong output being returned ? This might give us all a clue as to the cause of the problem. When you run the check manually, are you doing this as the same user that check_nrpe will use ? Regards, Deborah <div> <div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0cm 0cm 0cm"> From: Thilakraj.Shanmugam [<a href="mailto:Thilakraj.Shanmugam@canberra.edu.au" target="_blank">mailto:Thilakraj.Shanmugam@canberra.edu.au</a>] Sent: 14 May 2013 08:43 To: <a href="mailto:nagios-users@lists.sourceforge.net" target="_blank">nagios-users@lists.sourceforge.net</a> Subject: [Nagios-users] Nagios Plugin for IPTABLES Monitoring </div> </div> Greetings! Could someone send me nagios plugin which is tested and works well for monitoring IPTABLES in Linux. I have tested below script but it is not returning correct output to nagios server. If I execute script manually, it shows correct output… But if I execute via ./check_nrpe – H localhost –c check_iptables, it shows wrong output. Below is my plugin ------------------------------ #!/bin/bash set -x IPT='/sbin/iptables' GREP='/bin/grep' AWK='/bin/awk' EXPR='/usr/bin/expr' WC='/usr/bin/wc' A='/usr/bin/sudo' E_SUCCESS="0" E_CRITICAL="2" E_UNKNOWN="3" CHAINS=`$A $IPT -nvL | $GREP 'Chain' | $AWK '{ print $2 }'| $GREP Cid | $WC -l` if [ $CHAINS -ne 0 ] ; then echo "Firewall is running!" exit ${E_SUCCESS} elif [ $CHAINS -eq 0 ] ; then echo "Firewall is not running" exit ${E_CRITICAL} fi This e-mail and any files transmitted with it are strictly confidential and intended solely for the use of the individual or entity to whom they are addressed. If you are not the intended recipient, please delete this e-mail immediately. Any unauthorised distribution or copying is strictly prohibited. Whilst Kognitio endeavours to prevent the transmission of viruses via e-mail, we cannot guarantee that any e-mail or attachment is free from computer viruses and you are strongly advised to undertake your own anti-virus precautions. 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