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firewall-cmd --zone=public --add-port=2888/tcp --permanent
firewall-cmd --permanent --zone=public --add-service=http 
firewall-cmd --reload
yum install -y --enablerepo=epel byobu

sudo ufw allow 139
sudo ufw allow 445
sudo ufw allow 137
sudo ufw allow 138

add before ``

iptables -L -n
systemctl restart iptables

change dns + nameserver

First, stop networkmanager from updating resolv.conf $ vi /etc/sysconfig/network-scripts/ifcfg-eth0

echo "DNS1=192.168.1.x" >> /etc/sysconfig/network-scripts/ifcfg-eth0
echo "DNS3=8.8.8.8" >> /etc/sysconfig/network-scripts/ifcfg-eth0
echo "DNS4=8.8.4.4" >> /etc/sysconfig/network-scripts/ifcfg-eth0

PEERDNS="no"
DNS1="192.168.1.x"
DNS2="8.8.8.8"
DNS3="8.8.4.4"