====== Installation ======
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<note important>Dont't install NFSEN on the server with DPI platform: report generation is CPU resource intensive, so it may result in worsening of DPI platform performance</note>

  - Install the exact time service<code>yum install ntp -y
ntpdate pool.ntp.org
service ntpd start
chkconfig ntpd on</code>
  - Add the vasexperts repository <code>rpm --import http://vasexperts.ru/centos/RPM-GPG-KEY-vasexperts.ru
rpm -Uvh http://vasexperts.ru/centos/6/x86_64/vasexperts-repo-2-1.noarch.rpm</code>
  - Install NFSEN (Apache WEB server is installed along with NFSEN): <code>yum install nfsen</code>
  - Check that the service can be started: <code>service httpd start
service nfsen start</code>
  - Configure the service to start automatically on power on: <code>chkconfig httpd on
chkconfig nfsen on</code>
  - Open firewall ports to access Apache and to get netflow: <code>vi /etc/sysconfig/iptables
-A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
-A INPUT -m state --state NEW -m udp -p udp --dport 9997 -j ACCEPT
-A INPUT -m state --state NEW -m udp -p udp --dport 9998 -j ACCEPT</code>
  - Switch off selinux ((Temporary solution))<code>setenforce 0
vi /etc/selinux/config
SELINUX=disabled</code>
  - Open the page <nowiki>http://hostname/nfsen/nfsen.php</nowiki> in your browser. Here hostname - is the name or address of nfsen server. Check that everything works fine.