route#config t Enter configuration commands, one per line. End with CNTL/Z. route(config)#int fa0/1 route(config-if)#ip access-group 112 in 然后，在这个组里面，写入 允许 上网 的主机地址(配置要在全局下配置)。最后加一条，不符合以上条件者，全route#config t Enter configuration commands, one per line. End with CNTL/Z.
route(config)#int fa0/1 route(config-if)#ip access-group 112 in然后，在这个组里面，写入允许上网的主机地址(配置要在全局下配置)。最后加一条，不符合以上条件者，全部过滤。
access-list 112 permit ip host 192.168.0.160 any access-list 112 permit ip host 192.168.0.161 any access-list 112 permit ip host 192.168.0.162 any access-list 112 permit ip host 192.168.0.163 any access-list 112 permit ip host 192.168.0.164 any access-list 112 permit ip host 192.168.0.165 any access-list 112 permit ip host 192.168.0.166 any access-list 112 permit ip host 192.168.0.167 any access-list 112 permit ip host 192.168.0.168 any access-list 112 permit ip host 192.168.0.169 any access-list 112 permit ip host 192.168.0.170 any access-list 112 permit ip host 192.168.0.171 any access-list 112 permit ip host 192.168.0.172 any access-list 112 permit ip host 192.168.0.173 any access-list 112 permit ip host 192.168.0.174 any access-list 112 permit ip host 192.168.0.175 any access-list 112 permit ip host 192.168.0.151 any access-list 112 permit ip host 192.168.0.5 any access-list 112 deny ip any any在这个表中，我允许了160-175可以访问公网。还有一条比较特殊，因为我们公司有WEB代理服务器。服务器地址为5。所以一定要允许代理服务器访问网关。要不公司里允许上网的人也打不开网页了!如果公司有web,ftp,mail应该把这些服务器地址，添加到访问控制列表中。以保证他们正常工 作!【责编:peter】