Router(config)#access-list 110 deny tcp any host 172.16.30.5 eq 23
Router(config)#access-list 110 permit ip any any
记住默认隐含的deny all.应用到E1接口,注意方向为out,如下:
Router(config)#int e1
Router(config-if)#ip access-group 110 out
Named Access Lists
命名访问列表是创建标准和扩展访问列表的另外1种方法.它允许你使用命名的方法来创建和应用标准或者扩展访问列表.使用ip access-list命令来创建,如下:
Router(config)#ip access-list ?
extended Extended Acc
logging Control access list logging
standard Standard Access List
Router(config)#ip access-list standard ?
<1-99> Standard IP access-list number
WORD Access-list name
Router(config)#ip access-list standard BlockSales
Router(config-std-nacl)#?
Standard Access List configuration commands:
default Set a command to its defaults
deny Specify packets to reject
exit Exit from access-list configuration mode
no Negate a command or set its default
permit Specify packets to forward
Router(config-std-nacl)#deny 172.16.40.0 0.0.0.255
Router(config-std-nacl)#permit any
Router(config-std-nacl)#exit
Router(config)#^Z
Router#sh run
!
ip access-list standard BlockSales