-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：很多網友把這兩條規則添加到防火墻配置的最后一行，導致防火墻啟動失敗，正確的應該是添加到默認的22端口這條規則的下面
添加好之后防火墻規則如下所示：
復制代碼
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
