To disable the firewall on each host in your cluster, perform the following steps on each host.
iptables
sudo yum install iptables
sudo zypper install iptables
sudo apt-get install iptables
sudo iptables-save > ~/firewall.rules
sudo systemctl disable firewalld sudo systemctl stop firewalld
sudo chkconfig SuSEfirewall2_setup off sudo chkconfig SuSEfirewall2_init off sudo rcSuSEfirewall2 stop
sudo service ufw stop