Debian / Ubuntu using System V init scripts:

• cp /opt/enswitch/current/etc/init.d/debian/iptables /etc/init.d/iptables
• # Edit /etc/init.d/iptables and add a line allowing traffic from all other machines in the cluster.
• update-rc.d iptables start 95 2 3 4 5 .
• service iptables start

Debian / Ubuntu using Systemd:

• cp /opt/enswitch/current/etc/init.d/debian/iptables /etc/init.d/iptables
• # Edit /etc/init.d/iptables and add a line allowing traffic from all other machines in the cluster.
• update-rc.d iptables remove
• cp /opt/enswitch/current/etc/systemd/debian/iptables.service /etc/systemd/system/iptables.service
• systemctl daemon-reload
• systemctl enable iptables.service
• systemctl start iptables.service

Devuan:

• cp /opt/enswitch/current/etc/init.d/devuan/iptables /etc/init.d/iptables
• # Edit /etc/init.d/iptables and add a line allowing traffic from all other machines in the cluster.
• update-rc.d iptables defaults
• service iptables start

CentOS 7:

• systemctl stop firewalld
• systemctl mask firewalld
• yum install -y iptables-services
• cp /opt/enswitch/current/install/etc/sysconfig/iptables /etc/sysconfig/iptables
• # Edit /etc/sysconfig/iptables and add a line allowing traffic from all other machines in the cluster.
• systemctl enable iptables.service
• systemctl start iptables.service

CentOS 8 and later or Rocky Linux:

• systemctl stop firewalld
• systemctl mask firewalld
• dnf install -y iptables-services
• cp /opt/enswitch/current/install/etc/sysconfig/iptables /etc/sysconfig/iptables
• # Edit /etc/sysconfig/iptables and add a line allowing traffic from all other machines in the cluster.
• systemctl enable iptables.service
• systemctl start iptables.service

Others:

• cp /opt/enswitch/current/install/etc/sysconfig/iptables /etc/sysconfig/iptables
• # Edit /etc/sysconfig/iptables and add a line allowing traffic from all other machines in the cluster.
• chkconfig iptables on
• service iptables restart