朱杰兵blog

Linux下在防火墻中開啟80端口、3306端口的方法

vi /etc/sysconfig/iptables

-A INPUT -m state –state NEW -m tcp -p tcp –dport 80 -j ACCEPT（允許80端口通過防火墻）
-A INPUT -m state –state NEW -m tcp -p tcp –dport 3306 -j ACCEPT（允許3306端口通過防火墻）
特別提示：很多網(wǎng)友把這兩條規(guī)則添加到防火墻配置的最后一行，導(dǎo)致防火墻啟動(dòng)失敗，正確的應(yīng)該是添加到默認(rèn)的22端口這條規(guī)則的下面

添加好之后防火墻規(guī)則如下所示：

代碼如下:
# 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 -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

然后重啟一下防火墻

service iptables restart

搞定!

centos7不太一樣