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至顶网网络频道路由交换 acl-nat 实验配置

acl-nat 实验配置

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acl-nat 实验配置

来源:chinaitlab 2011年4月16日

关键字: 路由交换 路由协议

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  实验拓扑图如上

  用NAT让内外网通讯

  一、配置IP地址

  inside:lo0=172.16.1.1/24

  lo1=172.16.2.1/24

  s1/0=12.1.1.1/24

  Border:s1/0=12.1.1.2/24

  f0/0=23.1.1.1/24

  ISP:f0/0=23.1.1.2/24

  lo0=100.100.100.100/24

  配置inside

  inside>en

  inside#conf t

  Enter configuration commands, one per line. End with CNTL/Z.

  inside(config)#no ip domain-lookup

  inside(config)#line console 0

  inside(config-line)#exec-timeout 0 0

  inside(config-line)#logg syn

  inside(config-line)#exit

  inside(config)#exit

  inside#conf t

  Enter configuration commands, one per line. End with CNTL/Z.

  inside(config)#int l 0

  inside(config-if)#ip add

  *Mar 1 00:32:49.143: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback0, changed state to up

  inside(config-if)#ip add 172.16.1.1 255.255.255.0

  inside(config-if)#int l 1

  inside(config-if)#ip add

  *Mar 1 00:33:01.391: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback1, changed state to up

  inside(config-if)#ip add 172.16.2.1 255.255.255.0

  inside(config-if)#int s1/0

  inside(config-if)#no sh

  inside(config-if)#ip add 12.1.1.

  *Mar 1 00:33:26.919: %LINK-3-UPDOWN: Interface Serial1/0, changed state to up

  inside(config-if)#ip add 12.1.1.1 25

  *Mar 1 00:33:27.927: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to up

  inside(config-if)#ip add 12.1.1.1 255.255.255.0

  配置border

  border>en

  border#conf t

  Enter configuration commands, one per line. End with CNTL/Z.

  border(config)#no ip domain-lookup

  border(config)#line console 0

  border(config-line)#exec-timeout 0 0

  border(config-line)#logg syn

  border(config-line)#exit

  border(config)#exit

  border#conf t

  Enter configuration commands, one per line. End with CNTL/Z.

  border(config)#int s1/0

  border(config-if)#no sh

  border(config-if)#ip add

  *Mar 1 00:34:53.755: %LINK-3-UPDOWN: Interface Serial1/0, changed state to up

  border(config-if)#ip add 12

  *Mar 1 00:34:54.763: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to up

  border(config-if)#ip add 12.1.1.2 255.255.255.0

  配置isp

  isp>en

  isp#conf t

  Enter configuration commands, one per line. End with CNTL/Z.

  isp(config)#no ip domain-lookup

  isp(config)#line console 0

  isp(config-line)#exec-timeout 0 0

  isp(config-line)#logg syn

  isp(config-line)#exit

  isp(config)#exit

  isp#conf

  Configuring from terminal, memory, or network [terminal]? t

  Enter configuration commands, one per line. End with CNTL/Z.

  isp(config)#int f0/0

  isp(config-if)#no sh

  isp(config-if)#ip add

  *Mar 1 00:36:23.871: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up

  *Mar 1 00:36:24.871: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up

  isp(config-if)#ip add 23.1.1.2 255.255.255.0

  isp(config-if)#int l 0

  isp(config-if)#no sh

  isp(config-if)#

  *Mar 1 00:36:37.931: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback0, changed state to up

  isp(config-if)#ip add 100.100.100.100 255.255.255.0二、配置routing通信

  二、配置routing通信

  1.Border

  1)配置缺省路由指向ISP

  测试能否ping通ISP的环回口

  2)配置汇总路由指向Inside

  border(config)#ip route 172.16.0.0 255.255.0.0 12.1.1.1

  border(config)#ip route 0.0.0.0 0.0.0.0 23.1.1.2

  border#ping 100.100.100.100

  Type escape sequence to abort.

  Sending 5, 100-byte ICMP Echos to 100.100.100.100, timeout is 2 seconds:

  .!!!!

  Success rate is 80 percent (4/5), round-trip min/avg/max = 8/33/56 ms

  2.Inside

  1)配置缺省路由指向Borde

  2)配置汇总路由指向Null0端口(防环路)

  测试Borde能否与内网通信

  inside(config)#ip route 0.0.0.0 0.0.0.0 12.1.1.2

  inside(config)#ip route 172.16.0.0 255.255.0.0 null 0

  border#ping 172.16.1.1

  Type escape sequence to abort.

  Sending 5, 100-byte ICMP Echos to 172.16.1.1, timeout is 2 seconds:

  !!!!!

  Success rate is 100 percent (5/5), round-trip min/avg/max = 8/40/72 ms

  三、配置动态NAT

  Router(config)#access-list 1 per 192.168.21.1

  border(config)#access-list 1 per 172.16.1.1 0.0.0.255

  border(config)#access-list 1 per 172.16.2.1 0.0.0.255

  Router(config)#$ cisco 10.10.10.10 10.10.10.10 netmask 255.255.255.0

  border(config)#ip nat inside source list 1 pool cisco overload

  border(config)#int s1/0

  border(config-if)#ip nat ins

  border(config-if)#ip nat inside

  border(config-if)#int f0/0

  border(config-if)#ip nat out

  border(config-if)#ip nat outside

  Router#

  *Mar 1 00:12:04.707: NAT*: s=192.168.21.1->10.10.10.10, d=100.100.100.100 [10]

  Router#

  *Mar 1 00:12:06.675: NAT*: s=192.168.21.1->10.10.10.10, d=100.100.100.100 [11]

  Router#

  *Mar 1 00:12:08.659: NAT*: s=192.168.21.1->10.10.10.10, d=100.100.100.100 [12]

  Router#

  *Mar 1 00:12:10.643: NAT*: s=192.168.21.1->10.10.10.10, d=100.100.100.100 [13]

  Router#

  *Mar 1 00:12:12.659: NAT*: s=192.168.21.1->10.10.10.10, d=100.100.100.100 [14]

  Router#

  *Mar 1 00:13:12.903: NAT: expiring 10.10.10.10 (192.168.21.1) icmp 2 (2)

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