MRTG

MRTG HowTO (Centos 5.5 64bit)

What is MRTG ?

"The Multi Router Traffic Grapher (MRTG) is a tool to monitor the traffic load on network-links. MRTG generates HTML pages containing GIF images which provide a LIVE visual representation of this traffic."

# Required RPMs

* mrtg
* snmp
* snmp-utils

# Make sure snmp server installed

rpm -qa | grep snmp

if not then install this packages

yum install net-snmp-utils.x86_64 net-snmp.x86_64

# Determine if snmp server is running or not

ps -aux | grep snmp

# Start service & then check again

service snmpd start

# check if started on port 199

netstat -natv | grep ':199'

tcp 0 0 127.0.0.1:199 0.0.0.0:* LISTEN

or

lsof -i :199

COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME

snmpd 29793 root 8u IPv4 89533572 TCP localhost:smux (LISTEN)

# add it permanent to boot at startup

chkconfig --add snmpd

# Make sure snmp server configured properly

snmpwalk -v 1 -c public localhost IP-MIB::ipAdEntIfIndex

no output then follow steps below (if ur configuring first time then this steps are necessary)

vi /etc/snmp/snmpd.conf ( Modified as per my need please config as per your need)

com2sec local localhost public
com2sec mynetwork 10.0.0.0/16 public
group MyRWGroup v1 local
group MyRWGroup v2c local
group MyRWGroup usm local
group MyROGroup v1 mynetwork
group MyROGroup v2c mynetwork
group MyROGroup usm mynetwork
view all included .1 80
access MyROGroup "" any noauth exact all none none
access MyRWGroup "" any noauth exact all all none
#syslocation Unknown (edit /etc/snmp/snmpd.conf)
#syscontact Root (configure /etc/snmp/snmp.local.conf)

chkconfig snmpd on

/etc/init.d/snmpd restart

snmpwalk -v 1 -c public localhost IP-MIB::ipAdEntIfIndex

# Install mrtg if not installed

rpm -qa | grep mrtg

yum install mrtg

# Commands to Configure mrtg

mkdir -p /var/www/html/mymrtg/

# cfgmaker command to create mrtg configuration file

cfgmaker --global 'WorkDir: /var/www/html/mymrtg' --output /etc/mrtg/mymrtg.cfg public@localhost

OR

cfgmaker --global 'WorkDir: /var/www/html/mymrtg' --output /etc/mrtg/mymrtg1.cfg public@rh9.test.com (need FQDN & should resolve)

# Create default index page for your MRTG configuration

indexmaker --output=/var/www/html/mymrtg/index.html /etc/mrtg/mymrtg.cfg

# Copy all tiny png files to your mrtg path

cp -av /var/www/mrtg/*.png /var/www/html/openx/mymrtg/

# Run below command

env LANG=C /usr/bin/mrtg /etc/mrtg/mymrtg.cfg

mrtg /etc/mrtg/mymrtg.cfg

# Make a Shell Script of above command & add in crontab

vi /root/mrtg.sh

env LANG=C /usr/bin/mrtg /etc/mrtg/mymrtg.cfg

mrtg /etc/mrtg/mymrtg.cfg

crontab -e

*/5 * * * * sh /root/mrtg.sh

# Protect your MRTG graphs/html pages with password protected directory

Create .htaccess file

vi /var/www/html/mymrtg/.htaccess

AuthName "MRTG Graphs/Html restricted access"
AuthType Basic
AuthUserFile /var/www/html/mymrtg/.htpasswd
require user mrtgadmin

Create a user and password name (-c assumes first time you are using .htpasswd file):

htpasswd -c /var/www/html/mymrtg/.htpasswd mrtgadmin

DONE.......

Just Browse your page http://ordomainname/mymrtg

U can do change in index.html as per your need