1. disable Firewalld Service.
[root@rhel-centos7-tejas-barot-linux ~]# systemctl mask firewalld
2. Stop Firewalld Service.
[root@rhel-centos7-tejas-barot-linux ~]# systemctl stop firewalld
3. Install iptables service related packages.
[root@rhel-centos7-tejas-barot-linux ~]# yum -y install iptables-services
4. Make sure service starts at boot:
[root@rhel-centos7-tejas-barot-linux ~]# systemctl enable iptables
# If you do not want ip6tables,You can skip following command.
[root@rhel-centos7-tejas-barot-linux ~]# systemctl enable ip6tables
5. Now,Finally Let’s start the iptables services.
[root@rhel-centos7-tejas-barot-linux ~]# systemctl start iptables
ottom: 0.75em; font-size: 16px; line-height: 28.799999237060547px; text-indent: 1em; color: #333333; font-family: 'Helvetica Neue',You can skip following command.
[root@rhel-centos7-tejas-barot-linux ~]# systemctl start ip6tables
Firewalld Service is Now disabled and stop,You can use iptables.
