To disable the firewall on each host in your cluster, perform the following steps on each host.

1. For iptables, save the existing rule set:

   • sudo iptables-save > ~/firewall.rules

2. Disable the firewall:
   • RHEL 7 compatible:

     sudo systemctl disable firewalld
     sudo systemctl stop firewalld

   • SLES:

     sudo chkconfig SuSEfirewall2_setup off
     sudo chkconfig SuSEfirewall2_init off
     sudo rcSuSEfirewall2 stop

   • Ubuntu:

     sudo service ufw stop