Hydras

其实好象可以用，但那个红红的FAILED让人看了发慌
请问是什么原因？怎么解决？谢谢

错误提示如下：
# service iptables start
Flushing firewall rules: [ OK ]
Setting chains to policy ACCEPT: raw nat mangle filter [FAILED]
Unloading iptables modules: [ OK ]
Applying iptables firewall rules: [ OK ]