開啟配置檔案

命令程式碼

[root@localhost ~]# vi /etc/sysconfig/iptables

正確的配置檔案

配置程式碼

# Firewall configuration written by system-config-firewall

# Manual customization of this file is not recommended.

*filter

:INPUT ACCEPT [0:0]

:FORWARD ACCEPT [0:0]

:OUTPUT ACCEPT [0:0]

-A INPUT -m state –state ESTABLISHED,RELATED -j ACCEPT

-A INPUT -p icmp -j ACCEPT

-A INPUT -i lo -j ACCEPT

-A INPUT -m state –state NEW -m tcp -p tcp –dport 22 -j ACCEPT

-A INPUT -m state –state NEW -m tcp -p tcp –dport 80 -j ACCEPT

-A INPUT -j REJECT –reject-with icmp-host-prohibited

-A FORWARD -j REJECT –reject-with icmp-host-prohibited

COMMIT

配置[*]通配程式碼

-A INPUT -m state –state NEW -m tcp -p tcp –dport * -j ACCEPT

注意點：新開放的埠一定要在埠22後面

重啟防火牆使配置生效

命令程式碼

[root@localhost ~]# /etc/init.d/iptables restart

其它

檢視開放埠

命令程式碼

[root@localhost ~]# /etc/init.d/iptables status

關閉防火牆

命令程式碼

[root@localhost ~]# /etc/init.d/iptables stop