shell script not working properly as Nagios plugin

[Mike Clark]

Second that response.

From: vishesh kumar [mailto:linuxtovishesh at gmail.com]
Sent: Friday, July 20, 2012 6:42 AM
To: Nagios Users List
Subject: [Nagios-users] shell script not working properly as Nagios plugin

Hi Members,

I wrote below script to monitor ssh traffic

+++++++++++++++++++++++++++++++++++++++++++
a=$(/usr/bin/sudo /sbin/iptables -vL|/bin/grep ':ssh'|/bin/awk '{print $1}')
if [ $a -gt 3 ]; then
echo "SSH aatempt is TOO High | $a"
exit 2
else
if [ $a -gt 2 ]; then
echo "SSH aatempt is Average | $a"
exit 1
else
echo "No SSH attempts | $a"
exit 0
fi
fi
exit 3
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++

This script is working fine on shell and returning "SSH attempt is too high" . But when i run it via nagios the output returned OK and print "No SSH attempts".

What I can notice that variable a not holding any value while running via nagios , while its working fine when running via shell.

Can you please drive me in right direction ?


Thanks
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