CentOS 7でのiptablesの使用

1、firewallを閉じる:

systemctl stop firewalld.service #  firewall

systemctl disable firewalld.service #  firewall    

2、iptablesファイアウォールの取り付け

#  
yum install iptables-services 

ファイアウォールプロファイルの編集

vi /etc/sysconfig/iptables

# sample configuration for iptables service
# you can edit this manually or use system-config-firewall
# please do not ask us to add additional ports/services to this default configuration
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT

-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 21 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 20 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 80  -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT       

:wq! #    

systemctl restart iptables.service #            

systemctl enable iptables.service #         

3、SELINUXを閉じる

vi /etc/selinux/config

#SELINUX=enforcing #   
#SELINUXTYPE=targeted #   
SELINUX=disabled #  

:wq! #     

setenforce 0 #