（命令直接複製執行！）
檢視防火牆狀態：
/etc/init.d/iptables status
暫時關閉防火牆：
/etc/init.d/iptables stop
配置防火牆：
vi /etc/sysconfig/iptables
-a input -m state –state new -m tcp -p tcp –dport 8080 -j accept（允許8080埠通過防火牆）
-a input -m state –state new -m tcp -p tcp –dport 3306 -j accept（允許3306埠通過防火牆）
新增好之後防火牆配置如下所示：
# 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]
-ainput -m state –state established,related -j accept
-ainput -p icmp -j accept
-ainput -i lo -j accept
-ainput -m state –state new -m tcp -p tcp –dport 22 -j accept
-ainput -m state –state new -m tcp -p tcp –dport 8080 -j accept
-ainput -m state –state new -m tcp -p tcp –dport 3306 -j accept
-ainput -j reject –reject-with icmp-host-prohibited
-aforward -j reject –reject-with icmp-host-prohibited
commit
重啟防火牆使配置生效：
/etc/init.d/iptables restart
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