直接命令：service firewalld stop
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. Linux学习，http:// linux.it.net.cn
[root@rhel-centos7-tejas-barot-linux ~]# yum -y install iptables-services Linux学习，http:// linux.it.net.cn
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. Linux学习，http:// linux.it.net.cn
[root@rhel-centos7-tejas-barot-linux ~]# systemctl enable ip6tables Linux学习，http:// linux.it.net.cn
5. Now, Finally Let’s start the iptables services.
[root@rhel-centos7-tejas-barot-linux ~]# systemctl start iptables
# If you do not want ip6tables, 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.
http://linux.it.net.cn/CentOS/fast/2015/0314/13904.html
原文：http://www.cnblogs.com/softidea/p/5271726.html