Setting up NTOP on Centos

yum install gcc gcc-c++ make libpcap libpcap-devel gdbm-devel libpng-devel libtool libtool-libs rrdtool rrdtool-devel
yum install cairo-devel libxml2-devel pango-devel pango libpng-devel -y
yum install freetype freetype-devel libart_lgpl-devel wget gcc make -y
yum install perl-ExtUtils-MakeMaker -y
yum install graphviz -y
yum install subversion openssl-devel -y
cd /opt
tar -zxvf rrdtool-1.4.5.tar.gz
cd rrdtool-1.4.5
./configure –prefix=/usr/local/rrdtool
make && make install

yum install libpcap libpcap-devel gdbm gdbm-devel -y
yum install libevent libevent-devel -y
cd /opt
tar -zxvf GeoIP-1.4.8.tar.gz
cd GeoIP-1.4.8
make && make install

yum install libtool automake autoconf -y
cd /opt
tar zxvf ntop-4.1.0.tar.gz
cd ntop-4.1.0
./ -prefix=/usr/local/ntop
make && make install
make install-selinux-policy
add “/usr/local/ntop/share/man” to “/etc/man.config”
useradd -M -s /sbin/nologin -r ntop
chown ntop:root /usr/local/ntop
chown ntop:ntop /usr/local/ntop/share/ntop

cd /usr/local/ntop/bin/
./ntop -u ntop -P /usr/local/ntop -A

vi /etc/sysconfig/iptables

Append the following rules before the final INPUT – REJECT line:
(note we’re running the webpage on port 3000 and receiving netflow traffic on port 9996)

-A INPUT -m state –state NEW -m tcp -p tcp –dport 3000 -j ACCEPT
-A INPUT -m state –state NEW -m udp -p udp –dport 9996 -j ACCEPT

Then restart iptables

service iptables restart

cd /usr/local/ntop/bin
./usr/local/ntop/bin/ntop -P /usr/local/ntop -u ntop -d -w 3000 -i eth0
test via webpage:3000

vi /etc/rc.local
add in
/usr/local/ntop/bin/ntop -P /usr/local/ntop -u ntop -d -w 3000 -i eth0

Setting web options:
The first time you open the ntop web interface you’ll need to do the following:
1. head to plugins -> netflow -> activate
This will activate netflow, don’t click the “yes” option as this will toggle it off again.
2. head to plugins -> netflow -> view/configure
3. Create a new collector named “eth#-collector” where # is the eth interface number you’re sending data to.
4. Edit this collector and ensure the following settings are in place:
– local collector udp port: 9996
– flow aggregation: none
– enable session handling: no
– assume ftp: no
– debug: off
5. Head to Admin -> Configure -> Preferences
6. change dot.path value to “/usr/bin/dot” (hit set when done)
7. head to and get a google maps API key (turn on Google maps API v2 and create a new browser-referrer key)
8. head back to Admin -> Configure -> Preferences
9. change google_maps.key value to your copied key (hit set when done)
10. stop ntop (killall ntop)
11. reboot server and confirm ntop starts upon boot.