Shell Script - snmp.sh

This script is another one that will ATTEMPT to identify machines running SNMP on a network. I wrote this so I could guarantee that the machine is running SNMP. It will acutally pull data from a 'snmpwalk' and then grep out 'SNMP' from the first line. This is because the first line shows what version snmp is running. The script assumes the service is version 1. There is also input so you can add your own text for the community. Enjoy!

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snmp.sh

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#! /bin/bash

clear
echo "------------------------------------------------------------"
echo "This Will ATTEMPT To Identify Nodes Running SNMP"
echo "Just FYI... You Probably Need To Run This As ROOT"
echo "------------------------------------------------------------"
sleep 5
clear

echo "--------------------------------------------"
echo "Output Will Go To 'snmp.sh.txt' & The Screen"
echo "--------------------------------------------"
sleep 3
clear

echo "-----------------------------"
echo "Enter First 3 Octets (x.x.x):"
read ipthree
echo "-----------------------------"
echo "Enter 4th Octet FIRST IP:"
read ipfirst
echo "-----------------------------"
echo "Enter 4th Octet ENDING IP:"
read iplast
echo "-----------------------------"
sleep 1
clear

echo "-----------------------------------------------------"
echo "Enter The Community String For Making The Connection:"
echo "(most default strings are: public)"
read string
echo "-----------------------------------------------------"
sleep 1
clear

echo "Results Start From : `date`" > snmp.sh.txt
echo "-------------------------------------------------------" >> snmp.sh.txt
echo "IP Range: $ipthree.$ipfirst-$iplast" >> snmp.sh.txt
echo "-------------------------------------------------------" >> snmp.sh.txt
echo "Community: $string" >> snmp.sh.txt
echo "-------------------------------------------------------" >> snmp.sh.txt

for (( i = $ipfirst ; i <= $iplast ; i++ ))
do
result=`snmpwalk -v 1 -c $string $ipthree.$i | head -n1 | cut -c1-4`

if [ $result = SNMP ]
then
echo "Y:$ipthree.$i" >> snmp.sh.txt
clear
cat snmp.sh.txt
else
clear
cat snmp.sh.txt
fi

done

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