acl number 3000rule 0 deny ip source x.x.x.x 0.0.0.255(反向) destination x.x.x.x 0.0.0.255(反向)rule 1 deny ........int e0/1firewall enablefirewall 应用到接口，命令忘了，各个设备配置不一样
ACL过滤
