interface serial 0 ! 定义接口
description To The Internet ! 目的描述
ip address 161.71.73.33 255.255.255.248 ! 设置IP地址
ip access-list 101 in ! 定义入站过滤器
ip access-list 102 out ! 定义出站过滤器
access-list 101 permit tcp any any established Note 1 ! 允许所有tcp业务流入,会话始于园区网内
access-list 101 permit tcp any host 144.254.1.3 eq ftp ! 允许 ftp 到不洁网
!(dirty net )中的ftp服务器
access-lsit 101 permit tcp any host 144.254.1.3 eq ! 允许 ftp 数据到不洁网中的ftp服务器
ftp-date
access-list 101 deny ip 127.0.0.0 0.255.255.255 any ! 阻止来自Internet并以RFC
access-list 101 deny ip 10.0.0.0 0.255.255.255 any !保留地址为源的数据包入站
access-list 101 deny ip 172.16.0.0 0.240.255.255 any
access-list 101 deny ip 192.168.0.0 0.0.255.255 any
access-list 101 deny icmp any any echo-reply ! 拒绝任何应答
access-list 101 deny icmp any any host-unreachable ! 拒绝任何无法接通的主机
access-list 101 deny udp any any eq snmp ! 拒绝引入的SNMP
access-list 101 deny udp any eq 2000 ! 拒绝引入的openwindows
access-list 101 deny udp any any gt 6000 ! 拒绝引入的X-windows
access-list 101 deny tcp any any eq 2000 ! 拒绝引入的openwindows
access-list 101 deny tcp any any gt 6000 ! 拒绝引入的X-windows
access-list 101 deny udp any any eq 69 ! 拒绝引入的tftpd
access-list 101 deny udp any any eq 111 ! 拒绝引入的SunRPC
access-list 101 deny udp any any eq 2049 ! 拒绝引入的NFS
access-list 101 deny tcp any any eq 111 ! 拒绝引入的SunRPC
access-list 101 deny tcp any any eq 2049 ! 拒绝引入的 NFS
access-list 101 deny tcp any any eq 87 ! 拒绝引入的连接
access-list 101 deny tcp any any eq 512 ! 拒绝引入的 BSD UNIX “r”指令
access-list 101 deny tcp any any eq 513 ! 拒绝引入的 BSD UNIX “r”指令
access-list 101 deny tcp any any eq 514 ! 拒绝引入的 BSD UNIX “r”指令
access-list 101 deny tcp any any eq 515 ! 拒绝引入的 lpd
access-list 101 deny tcp any any eq 540 ! 拒绝引入的 uucpd
access-list 101 permit ip any any ! 其它均允许
access-list 102 permit ip 144.254.0.0 0.0.255.255 any ! 只允许有源的包
access-list 102 deny ip any any ! 园区网到Internet的地址