???????iptables??Unix???в??????????????????????????iptablesд??chkconfig????????????????/etc/init.d/??rc.d/init.d???￡?????iptables????????service????????????????
????Usage: /etc/init.d/iptables {start|stop|reload|restart|condrestart|status|panic|save}
????????????5?????????
????start???????????????????????
????stop????????????
????restart???????????????????????????
????save?????棨?????浽????????У?
????status????????????????????
????????3?????￡?
????reload???????Ч????restart?????????μ????????????
????condrestart??????????iptables???????飬??restart?е???????????????????е??????????????????????????????????????У?condrestart?????????????????panic??????????????б??????????DROP??????????????????????????????????????????????????