Install Repo
cd /etc/yum.repos.d/ wget http://packages.ntop.org/centos-stable/ntop.repo -O ntop.repo
Install Epel
rpm -ivh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
Install NTOP-NG
yum erase zeromq3 yum clean all yum update yum install pfring n2disk nprobe ntopng ntopng-data cento yum install pfring-drivers-zc-dkms
Open Firewall
firewall-cmd --zone=public --add-port=3000/tcp --permanent firewall-cmd --reload