Install & Configure Prerequisites
CentOS 5.5
Install Net-SNMP for the perl Modules
yum install net-snmp net-snmp-utils net-snmp-devel -y
yum groupinstall 'Development Tools'
yum groupinstall 'Development Libraries'
yum install perl-Config-IniFiles-2.56-1.el5.rf.noarch
Install Apache
yum install httpd php gcc glibc glibc-common gd gd-devel
Configure Apache to start on boot
/sbin/chkconfig --levels 345 httpd on
Configure iptables to allow Apache traffic
/sbin/iptables -I INPUT -p tcp --dport 80 -j ACCEPT
/etc/init.d/iptables save
/etc/init.d/iptables restart
Install & Configure Nagios
Install Nagios & Plugins
yum install nagios nagios-plugins nagios-plugins-setuid
Create the default Nagios web access user & set a password
htpasswd -c /etc/nagios/htpasswd.users nagiosadmin
Verify default config files
nagios -v /etc/nagios/nagios.cfg
Start Nagios
/etc/init.d/nagios start
Start Apache
/etc/init.d/httpd start
Download SNMPTT
wget http://downloads.sourceforge.net/project/snmptt/snmptt/snmptt_1.3/snmptt_1.3.tgz?r=http%3A%2F%2Fsourceforge.net%2Fprojects%2Fsnmptt%2Ffiles%2Fsnmptt%2Fsnmptt_1.3%2F&ts=1299457062&use_mirror=cdnetworks-us-2
Extract SNMPTT
tar xvzf snmptt_1.3.tgz
From the files it extracts
1. Copy snmptt to /usr/sbin/ and ensure it is executable (chmod +x snmptt)
2. Copy snmptthandler to /usr/sbin/ and ensure it is executable (chmod +x snmptthandler)
3. Copy snmptt.ini to /etc/snmp/ or /etc/ and edit the options inside the file.
4. Create the log folder /var/log/snmptt/.
Create the file snmptrapd.conf in /etc/snmp
nano snmptrapd.conf and add
traphandle default /usr/sbin/snmptt
disableAuthorization yes
donotlogtraps no
5. For daemon mode:
Modify the Net-SNMP snmptrapd.conf file by adding the following line:
traphandle default /usr/sbin/snmptthandler
Create the spool folder /var/spool/snmptt/:
mkdir /var/spool/snmptt/
A startup script is included which can be used to start and stop snmptt on Mandrake, RedHat and other systems. Copy the script to the init.d directory (renaming the file during the copy):
cp snmptt.init.d /etc/rc.d/init.d/snmptt
Add the service using chkconfig:
chkconfig --add snmptt
Configure the service to start at runlevel 2345:
chkconfig --level 2345 snmptt on
Snmptt will be started at the next reboot, or can be started immediately with:
service snmptt start
or
/etc/rc.d/init.d/snmptt start
To manually start snmptt, use:
snmptt --daemon
6. A log rotation script is included which can be used to rotate the log files on Mandrake, RedHat and other systems. Copy the file to the logrotate.d directory (renaming the file during the copy):
cp snmptt.logrotate /etc/logrotate.d/snmptt
Edit the /etc/logrotate.d/snmptt and update the paths and rotate frequency as needed.
7. Start snmptrapd using the command line: snmptrapd -On.
You should be able to edit the /etc/rc.d/init.d/snmptrapd script if you have one and change
the OPTIONS to "-On".
Note: The -On is recommended. This will make snmptrapd pass OIDs in numeric form and prevent SNMPTT from having to translate the symbolic name to numerical form. If the UCD-SNMP / Net-SNMP Perl module is not installed, then you MUST use the -On switch. Depending on the version of UCD-SNMP / Net-SNMP, some symbolic names may not translate correctly. See the FAQ for more info.
As an alternative, you can edit your snmp.conf file to include the line: printNumericOids 1. This setting will take effect no matter what is used on the command line.
Install instructions
http://xavier.dusart.free.fr/joomla/index.php/en/nagios/47-traps-snmp-dans-nagios
and
http://www.snmptt.org/docs/snmptt.shtml
For Testing enable
unknown_trap_log_enable = 1
log_system_enable = 1
Place holder
Useful Websites
http://xavier.dusart.free.fr/joomla/index.php/en/nagios/47-traps-snmp-dans-nagios
http://docstore.mik.ua/orelly/networking_2ndEd/snmp/appc_03.htm
Testing traps on Centos
snmptrap -v 1 -c public localhost UCD-SNMP-MIB::ucdStart "" 6 17 "" SNMPv2-MIB::sysLocation.0 s "HelloWorld"
