Firewall Disable / Enable and Stop/ Start in Redhat Linux / Unix and Ubuntu

When you install Oracle database you may need disabling firewall to enable all sessions connection. Let’s review the Firewall Disable-Enable and Stop-Start in Linux.

Firewall Disable / Enable and Stop/ Start in Linux

If your application and security rules don’t need any firewall then you can disable it with below script.

Firstly stop then disable it as follows.

service iptables stop
chkconfig iptables off

service ip6tables stop
chkconfig ip6tables off

Stop or Disable Firewall in Linux

You can disable firewall in Redhat with below script.

Firstly stop then disable it as follows.

systemctl stop firewalld
systemctl disable firewalld

You can disable and check status of firewall in Ubuntu with below script.

ufw disable

ufw status

You can enable and start Firewall in Oracle Linux as follows.

Firstly start then enable it as follows.

service iptables start
chkconfig iptables on

service ip6tables start
chkconfig ip6tables on

Start or Start Firewall in Linux

You can enable firewall in Redhat with below script.

Firstly start then enable it as follows.

systemctl start firewalld
systemctl enable firewalld

service firewalld start

You can enable Firewall, then check status of firewall  in Ubuntu as follows.

ufw enable

ufw status

Do you want to learn Linux System Administration for Beginners, then read the following articles.