檢視防火牆狀態
# service iptables status# service iptables stop# service iptables start查詢卡機防火牆是否自啟動
[root@cactiez ~]# chkconfig --list | grep iptables
iptables 0:off 1:off 2:on 3:on 4:on 5:on 6:off
由此可見：2/3/4/5都是開機啟動，數字代表runlevel等級
[root@cactiez ~]# chkconfig iptables off
[root@cactiez ~]# chkconfig --list | grep iptables
iptables 0:off 1:off 2:off 3:off 4:off 5:off 6:off
[root@cactiez ~]# chkconfig iptables on
[root@cactiez ~]# chkconfig --list | grep iptables
iptables 0:off 1:off 2:on 3:on 4:on 5:on 6:off
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