Disable Firewall on OCI Linux Servers

How to disable firewall on OCI Linux Servers / regular on-premise servers?

Below commands will work for OCI Linux OS Version 7, so please check your O.S Version before execute these commands.

Check OS Version:

For Oracle Linux:
 $ cat /etc/oracle-release (OR)  just type "hostnamectl" on the command line.

For Redhat Linux:
$ cat /etc/redhat-release

1) Check if firewall is running or not.

$ firewall-cmd --state

2) Stop firewall.

$ systemctl stop firewalld.service

Note: If you simply stop the firewall, once server rebooted, your firewall be started running again.  If you don't want to enable firewall rules after reboot permanently disable the firewall.

3) Disable firewall.

$ systemctl disable firewalld.service

4) Cross check if firewall is running or not.

$ firewall-cmd --state


If your OS Version is 6, to stop firewall you need to use iptables service.  Remember all commands needs to be run from root user, if not at least you should have sudo access to run these commands.

1) Status of firewalls

$ service iptables status

2) Stop firewalls.

$ service iptables stop

3) Disable firewalls.

$ chkconfig iptables off