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配置NAT，PAT

本文轉載自   查看原文   2018-01-10 11:28   1162 

配置靜態NAT

1.1 問題

隨着接入Internet的計算機數量的不斷猛增，IP地址資源也就愈加顯得捉襟見肘。事實上，除了中國教育和科研計算機網 （CERNET）外，一般用戶幾乎申請不到整段的C類IP地址。在其他ISP那里，即使是擁有幾百台計算機的大型局域網用戶，當他們申請IP地址時，所分 配的地址也不過只有幾個或十幾個IP地址。顯然，這樣少的IP地址根本無法滿足網絡用戶的需求。

  • 在R1上配置靜態NAT使192.168.1.1轉換為61.159.62.131，192.168.1.2轉換為61.159.62.132，實現外部網絡訪問。

1.2 方案

借助於NAT，私有（保留）地址的"內部"網絡通過路由器發送數據包時，私有地址被轉換成合法的IP地址，一個局域網只需使用少量IP地址（甚至是1個）即可實現私有地址網絡內所有計算機與Internet的通信需求。

這種通過使用少量的公有IP 地址代表較多的私有IP 地址的方式，將有助於減緩可用IP地址空間的枯竭。而且還能夠有效地避免來自網絡外部的攻擊，隱藏並保護網絡內部的計算機。

網絡拓撲如圖－1所示：

圖－1

1.3 步驟

實現此案例需要按照如下步驟進行。

步驟一：通用配置

1）配置R1端口IP地址，以及默認路由

  1. tarena-R1(config)#interface f0/0
  2. tarena-R1(config-if)#ip address 192.168.1.254 255.255.255.0
  3. tarena-R1(config-if)#no shutdown
  4. tarena-R1(config-if)#interface f0/1
  5. tarena-R1(config-if)#ip address 61.159.62.129 255.255.255.248
  6. tarena-R1(config-if)#no shutdown
  7. tarena-R1(config-if)#exit
  8. tarena-R1(config)#ip route 0.0.0.0 0.0.0.0 f0/1

2）配置R2端口IP地址

不需要在R2上配置到企業內網的靜態路由，因為NAT的存在，企業內部的地址都將被轉換、隱藏。

  1. tarena-R2(config)#interface f0/0
  2. tarena-R2(config-if)#ip address 61.159.62.130 255.255.255.248
  3. tarena-R2(config-if)#no shutdown
  4. tarena-R2(config-if)#interface f0/1
  5. tarena-R2(config-if)#ip address 192.168.2.254 255.255.255.0
  6. tarena-R2(config-if)#no shutdown

步驟二：靜態NAT配置

1）在R1上將192.168.1.1映射到61.159.62.131，將192.168.1.2映射到61.159.62.132

靜態映射有唯一對應的關系。

通過靜態NAT，可以把內網服務器發布到外網。

  1. tarena-R1(config)#ip nat inside source static 192.168.1.1 61.159.62.131
  2. tarena-R1(config)#ip nat inside source static 192.168.1.2 61.159.62.132

2）在R1上配置NAT內、外端口

  1. tarena-R1(config)#interface f0/0
  2. tarena-R1(config-if)#ip nat inside
  3. tarena-R1(config-if)#interface f0/1
  4. tarena-R1(config-if)#ip nat outside

3）分別在兩台PC機上測試到外網主機的通信

PC1測試如下所示：

  1. PC>ipconfig
  2. FastEthernet0 Connection:(default port)
  3. Link-local IPv6 Address.........: FE80::2D0:FFFF:FE45:CACC
  4. IP Address......................: 192.168.1.1
  5. Subnet Mask.....................: 255.255.255.0
  6. Default Gateway.................: 192.168.1.254
  7. PC>ping 192.168.2.1
  8. Pinging 192.168.2.1 with 32 bytes of data:
  9. Reply from 192.168.2.1: bytes=32 time=1ms TTL=126
  10. Reply from 192.168.2.1: bytes=32 time=0ms TTL=126
  11. Reply from 192.168.2.1: bytes=32 time=0ms TTL=126
  12. Reply from 192.168.2.1: bytes=32 time=0ms TTL=126
  13. Ping statistics for 192.168.2.1:
  14. Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
  15. Approximate round trip times in milli-seconds:
  16. Minimum = 0ms, Maximum = 1ms, Average = 0ms
  17. PC>

PC2的測試如下所示：

  1. PC>ipconfig
  2. FastEthernet0 Connection:(default port)
  3. Link-local IPv6 Address.........: FE80::200:CFF:FEEA:DE30
  4. IP Address......................: 192.168.1.2
  5. Subnet Mask.....................: 255.255.255.0
  6. Default Gateway.................: 192.168.1.254
  7. PC>ping 192.168.2.1
  8. Pinging 192.168.2.1 with 32 bytes of data:
  9. Request timed out.
  10. Reply from 192.168.2.1: bytes=32 time=0ms TTL=126
  11. Reply from 192.168.2.1: bytes=32 time=0ms TTL=126
  12. Reply from 192.168.2.1: bytes=32 time=0ms TTL=126
  13. Ping statistics for 192.168.2.1:
  14. Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),
  15. Approximate round trip times in milli-seconds:
  16. Minimum = 0ms, Maximum = 0ms, Average = 0ms
  17. PC>

4）在R1上查看NAT轉換表

  1. tarena-R1#show ip nat translations
  2. Pro Inside global Inside local Outside local Outside global
  3. icmp 61.159.62.131:10 192.168.1.1:10 192.168.2.1:10 192.168.2.1:10
  4. icmp 61.159.62.131:11 192.168.1.1:11 192.168.2.1:11 192.168.2.1:11
  5. icmp 61.159.62.131:12 192.168.1.1:12 192.168.2.1:12 192.168.2.1:12
  6. icmp 61.159.62.131:9 192.168.1.1:9 192.168.2.1:9 192.168.2.1:9
  7. icmp 61.159.62.132:27 192.168.1.2:27 192.168.2.1:27 192.168.2.1:27
  8. icmp 61.159.62.132:28 192.168.1.2:28 192.168.2.1:28 192.168.2.1:28
  9. icmp 61.159.62.132:29 192.168.1.2:29 192.168.2.1:29 192.168.2.1:29
  10. icmp 61.159.62.132:30 192.168.1.2:30 192.168.2.1:30 192.168.2.1:30

2 案例2：配置端口映射

2.1 問題

通過端口映射技術將內部服務器發布向Internet。

2.2 方案

在R1上配置端口映射將192.168.1.3的80端口映射為61.159.62.133的80端口，將web服務器發布到Internet。網絡拓撲如圖－2所示：

圖－2

2.3 步驟

實現此案例需要按照如下步驟進行。

步驟一：通用配置

1）在案例一基礎上取消靜態轉換條目，在192.168.1.0網絡新增一台web服務器IP為192.168.1.3。將192.168.1.3的80端口映射為61.159.62.133的80端口

  1. tarena-R1(config)#no ip nat inside source static 192.168.1.1 61.159.62.131
  2. tarena-R1(config)#no ip nat inside source static 192.168.1.2 61.159.62.132
  3. tarena-R1 (config)#ip nat inside source static tcp 192.168.1.3 80 61.159.62.133 80

步驟二：PC3上訪問web服務器進行驗證

1）外部主機PC4上訪問61.159.62.133進行驗證，如圖-3所示

圖-3

3 案例3：配置動態NAT

3.1 問題

  • 在R1通過動態NAT實現企業內網192.168.1.0/24轉換為公網地址61.159.62.131-61.159.62.134，訪問192.168.2.1

3.2 方案

網絡拓撲如圖－4所示：

圖－4

3.3 步驟

實現此案例需要按照如下步驟進行。

步驟一：動態NAT配置

1）刪除案例2中的端口映射

  1. tarena-R1 (config)#no ip nat inside source static tcp 192.168.1.3 80 61.159.62.133 80

2）在R1上配置ACL

  1. tarena-R1(config)#access-list 1 permit 192.168.1.0 0.0.0.255

3）在R1上配置可轉換的公網IP地址池

地址池是向ISP（Internet服務提供商，如電信、聯通）申請得到的，內網主機（上一步ACL中所包含的IP地址）到外網的訪問，內網地址將被動態的、隨機的轉換為這些合法地址。

  1. tarena-R1(config)#ip nat pool natpool 61.159.62.131 61.159.62.134 netmask 255.255.255.248

4）關聯ACL和公網的IP地址池

  1. tarena-R1(config)#ip nat inside source list 1 pool natpool

5）在R1上配置NAT內、外端口

  1. tarena-R1(config)#interface f0/0
  2. tarena-R1(config-if)#ip nat inside
  3. tarena-R1(config-if)#interface f0/1
  4. tarena-R1(config-if)#ip nat outside

6）分別在兩台PC機上測試到外網主機的通信

PC1測試如下所示：

  1. PC>ipconfig
  2. FastEthernet0 Connection:(default port)
  3. Link-local IPv6 Address.........: FE80::2D0:FFFF:FE45:CACC
  4. IP Address......................: 192.168.1.1
  5. Subnet Mask.....................: 255.255.255.0
  6. Default Gateway.................: 192.168.1.254
  7. PC>ping 192.168.2.1
  8. Pinging 192.168.2.1 with 32 bytes of data:
  9. Reply from 192.168.2.1: bytes=32 time=1ms TTL=126
  10. Reply from 192.168.2.1: bytes=32 time=0ms TTL=126
  11. Reply from 192.168.2.1: bytes=32 time=0ms TTL=126
  12. Reply from 192.168.2.1: bytes=32 time=0ms TTL=126
  13. Ping statistics for 192.168.2.1:
  14. Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
  15. Approximate round trip times in milli-seconds:
  16. Minimum = 0ms, Maximum = 1ms, Average = 0ms
  17. PC>

PC2測試如下所示：

  1. PC>ipconfig
  2. FastEthernet0 Connection:(default port)
  3. Link-local IPv6 Address.........: FE80::2D0:FFFF:FE45:CACC
  4. IP Address......................: 192.168.1.2
  5. Subnet Mask.....................: 255.255.255.0
  6. Default Gateway.................: 192.168.1.254
  7. PC>ping 192.168.2.1
  8. Pinging 192.168.2.1 with 32 bytes of data:
  9. Reply from 192.168.2.1: bytes=32 time=1ms TTL=126
  10. Reply from 192.168.2.1: bytes=32 time=0ms TTL=126
  11. Reply from 192.168.2.1: bytes=32 time=0ms TTL=126
  12. Reply from 192.168.2.1: bytes=32 time=0ms TTL=126
  13. Ping statistics for 192.168.2.1:
  14. Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
  15. Approximate round trip times in milli-seconds:
  16. Minimum = 0ms, Maximum = 1ms, Average = 0ms

7）在R1上查看NAT轉換表

轉換表中的對應關系是動態的，如192.168.1.1被轉換為61.159.62.131，但是下一次對外網的訪問很有可能被轉換為其他地址。

  1. tarena-R1#show ip nat translations
  2. Pro Inside global Inside local Outside local Outside global
  3. icmp 61.159.62.131:1362192.168.1.1:1362 192.168.2.1:1362 192.168.2.1:1362
  4. icmp 61.159.62.131:1392192.168.1.1:1392 192.168.2.1:1392 192.168.2.1:1392
  5. icmp 61.159.62.131:1393192.168.1.1:1393 192.168.2.1:1393 192.168.2.1:1393
  6. icmp 61.159.62.131:1394192.168.1.1:1394 192.168.2.1:1394 192.168.2.1:1394
  7. icmp 61.159.62.132:13 192.168.1.2:13 192.168.2.1:13 192.168.2.1:13
  8. icmp 61.159.62.132:14 192.168.1.2:14 192.168.2.1:14 192.168.2.1:14
  9. icmp 61.159.62.132:15 192.168.1.2:15 192.168.2.1:15 192.168.2.1:15
  10. icmp 61.159.62.132:16 192.168.1.2:16 192.168.2.1:16 192.168.2.1:16

4 案例4：PAT配置

4.1 問題

在R1配置PAT端口多路復用使企業內網192.168.1.0/24復用f0/1端口的IP，實現外部網絡的訪問。

4.2 方案

網絡拓撲如圖－5所示：

圖－5

4.3 步驟

實現此案例需要按照如下步驟進行。

步驟一：基於端口的PAT配置限制

1）刪除案例3中動態NAT配置

  1. tarena-R1(config)#no ip nat inside source list 1
  2. tarena-R1(config)#no ip nat pool natpool
  3. tarena-R1(config)#no access-list 1

2）在R1上配置ACL

  1. tarena-R1(config)#access-list 1 permit 192.168.1.0 0.0.0.255

3）關聯ACL和路由器連接互聯網的端口

該命令最后加上的overload表示復用。

  1. tarena-R1(config)#ip nat inside source list 1 interface f0/1 overload

4）在R1上配置NAT內、外端口

  1. tarena-R1(config)#interface f0/0
  2. tarena-R1(config-if)#ip nat inside
  3. tarena-R1(config-if)#interface f0/1
  4. tarena-R1(config-if)#ip nat outside

5）分別在兩台PC機上測試到外網主機的通信

PC1測試如下所示：

  1. PC>ipconfig
  2. FastEthernet0 Connection:(default port)
  3. Link-local IPv6 Address.........: FE80::2D0:FFFF:FE45:CACC
  4. IP Address......................: 192.168.1.1
  5. Subnet Mask.....................: 255.255.255.0
  6. Default Gateway.................: 192.168.1.254
  7. PC>ping 192.168.2.1
  8. Pinging 192.168.2.1 with 32 bytes of data:
  9. Reply from 192.168.2.1: bytes=32 time=1ms TTL=126
  10. Reply from 192.168.2.1: bytes=32 time=0ms TTL=126
  11. Reply from 192.168.2.1: bytes=32 time=0ms TTL=126
  12. Reply from 192.168.2.1: bytes=32 time=0ms TTL=126
  13. Ping statistics for 192.168.2.1:
  14. Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
  15. Approximate round trip times in milli-seconds:
  16. Minimum = 0ms, Maximum = 1ms, Average = 0ms
  17. PC>

PC2測試如下所示：

  1. PC>ipconfig
  2. FastEthernet0 Connection:(default port)
  3. Link-local IPv6 Address.........: FE80::2D0:FFFF:FE45:CACC
  4. IP Address......................: 192.168.1.2
  5. Subnet Mask.....................: 255.255.255.0
  6. Default Gateway.................: 192.168.1.254
  7. PC>ping 192.168.2.1
  8. Pinging 192.168.2.1 with 32 bytes of data:
  9. Reply from 192.168.2.1: bytes=32 time=1ms TTL=126
  10. Reply from 192.168.2.1: bytes=32 time=0ms TTL=126
  11. Reply from 192.168.2.1: bytes=32 time=0ms TTL=126
  12. Reply from 192.168.2.1: bytes=32 time=0ms TTL=126
  13. Ping statistics for 192.168.2.1:
  14. Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
  15. Approximate round trip times in milli-seconds:
  16. Minimum = 0ms, Maximum = 1ms, Average = 0ms
  17. PC>

6）在R1上查看NAT轉換表

  1. tarena-R1#show ip nat translations
  2. Pro Inside global Inside local Outside local Outside global
  3. icmp 61.159.62.129:2029192.168.1.1:2029 192.168.2.1:2029 192.168.2.1:2029
  4. icmp 61.159.62.129:2030192.168.1.1:2030 192.168.2.1:2030 192.168.2.1:2030
  5. icmp 61.159.62.129:2031192.168.1.1:2031 192.168.2.1:2031 192.168.2.1:2031
  6. icmp 61.159.62.129:2032192.168.1.1:2032 192.168.2.1:2032 192.168.2.1:2032
  7. icmp 61.159.62.129:2033192.168.1.1:2033 192.168.2.1:2033 192.168.2.1:2033
  8. icmp 61.159.62.129:2034192.168.1.1:2034 192.168.2.1:2034 192.168.2.1:2034
  9. icmp 61.159.62.129:2035192.168.1.1:2035 192.168.2.1:2035 192.168.2.1:2035

輸出結果顯示，所有的內網IP地址在訪問外網前均被轉換成了路由器端口的IP地址。

5 案例5：辦公區Internet的訪問

5.1 問題

在R1配置PAT端口多路復用使企業內網192.168.1.0/24復用f0/1端口的IP，實現外部網絡的訪問。

5.2 方案

網絡拓撲如圖－6所示：

圖－6

5.3 步驟

實現此案例需要按照如下步驟進行。

步驟一：在SM1划分vlan2、vlan3、vlan4 並給SM1配置虛端口IP並開啟路由功能，1-4接口開啟trunk

1）創建vlan並設置管理IP，開啟路由功能，並把相應的接口划分到vlan下

  1. SM1 (config)ip routing
  2. SM1 (config)#vlan 2
  3. SM1 (config-vlan)#vlan 3
  4. SM1 (config-vlan)#vlan 4
  5. SM1 (config-vlan)#
  6. SM1 (config-vlan)#exit
  7. SM1 (config)#interface vlan 1
  8. SM1 (config-if)#ip address 192.168.1.254 255.255.255.0
  9. SM1 (config-if)#eixt
  10. SM1 (config-if)#no shutdown
  11. SM1 (config-if)#exit
  12. SM1 (config)#interface vlan 2
  13. SM1 (config-if)#ip address 192.168.2.254 255.255.255.0
  14. SM1 (config-if)#no shutdown
  15. SM1 (config-if)#exit
  16. SM1 (config)#interface vlan 3
  17. SM1 (config-if)#ip address 192.168.3.254 255.255.255.0
  18. SM1 (config-if)#no shutdown
  19. SM1 (config-if)#exit
  20. SM1 (config)#interface vlan 4
  21. SM1 (config-if)#ip address 192.168.4.254 255.255.255.0
  22. SM1 (config-if)#no shutdown
  24. sw2(config)#vlan 2
  25. sw2(config-vlan)#exit
  26. sw2(config)#interface fastEthernet 0/1
  27. sw2(config-if)#switchport access vlan 2
  29. sw3(config)#vlan 3
  30. sw3(config-vlan)#exit
  31. sw3(config)#interface fastEthernet 0/1
  32. sw3(config-if)#switchport access vlan 3
  34. sw4(config)#vlan 4
  35. sw4(config-vlan)#exit
  36. sw4(config)#interface fastEthernet 0/1
  37. sw4(config-if)#switchport access vlan 4

2）交換機之間所連接的接口開啟trunk

  1. SM1(config)#interface range f0/1 - 4
  2. SM1 (config-if-range)#switchport trunk encapsulation dot1q
  3. SM1 (config-if-range)#switchport mode trunk
  5. sw1(config)#interface fastEthernet 0/3
  6. sw1(config-if)#switchport mode trunk
  8. sw2(config)#interface fastEthernet 0/3
  9. sw2(config-if)#switchport mode trunk
  11. sw3(config)#interface fastEthernet 0/3
  12. sw3(config-if)#switchport mode trunk
  14. sw4(config)#interface fastEthernet 0/3
  15. sw4(config-if)#switchport mode trunk

3）測試vlan之間的連通性

  1. PC>ipconfig
  2. FastEthernet0 Connection:(default port)
  3. Link-local IPv6 Address.........: FE80::290:21FF:FEC2:1A50
  4. IP Address......................: 192.168.1.1
  5. Subnet Mask.....................: 255.255.255.0
  6. Default Gateway.................: 192.168.1.254
  8. PC>ping 192.168.2.1
  9. Pinging 192.168.2.1 with 32 bytes of data:
  10. Reply from 192.168.2.1: bytes=32 time=0ms TTL=127
  11. Reply from 192.168.2.1: bytes=32 time=0ms TTL=127
  12. Reply from 192.168.2.1: bytes=32 time=0ms TTL=127
  13. Reply from 192.168.2.1: bytes=32 time=1ms TTL=12
  14. Ping statistics for 192.168.2.1:
  15. Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),
  16. Approximate round trip times in milli-seconds:
  17. Minimum = 0ms, Maximum = 1ms, Average = 0ms
  19. PC>ping 192.168.3.1
  20. Pinging 192.168.3.1 with 32 bytes of data:
  21. Reply from 192.168.2.1: bytes=32 time=0ms TTL=127
  22. Reply from 192.168.3.1: bytes=32 time=0ms TTL=127
  23. Reply from 192.168.3.1: bytes=32 time=0ms TTL=127
  24. Reply from 192.168.3.1: bytes=32 time=1ms TTL=127
  25. Ping statistics for 192.168.3.1:
  26. Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),
  27. Approximate round trip times in milli-seconds:
  28. Minimum = 0ms, Maximum = 1ms, Average = 0ms
  30. PC>ping 192.168.4.1
  31. Pinging 192.168.4.1 with 32 bytes of data:
  32. Reply from 192.168.2.1: bytes=32 time=0ms TTL=127
  33. Reply from 192.168.2.1: bytes=32 time=0ms TTL=127
  34. Reply from 192.168.2.1: bytes=32 time=0ms TTL=127
  35. Reply from 192.168.4.1: bytes=32 time=0ms TTL=127
  36. Ping statistics for 192.168.4.1:
  37. Packets: Sent = 4, Received = 1, Lost = 3 (75% loss),
  38. Approximate round trip times in milli-seconds:
  39. Minimum = 0ms, Maximum = 0ms, Average = 0ms

4）為SM1與路由器連接的接口和路由器配置IP並啟用動態路由RIP協議.

  1. SM1(config)#interface fastEthernet 0/5
  2. SM1(config-if)#no switchport
  3. SM1(config-if)#ip add 192.168.5.1 255.255.255.0
  4. SM1(config-if)#no shutdown
  5. SM1(config-if)#exit
  6. SM1(config)#router rip
  7. SM1(config-router)#version 2
  8. SM1(config-router)#no auto-summary
  9. SM1(config-router)#network 192.168.1.0
  10. SM1(config-router)#network 192.168.2.0
  11. SM1(config-router)#network 192.168.3.0
  12. SM1(config-router)#network 192.168.4.0
  13. SM1(config-router)#network 192.168.5.0
  15. Router(config)#interface fastEthernet 0/0
  16. Router(config-if)#ip address 192.168.5.2 255.255.255.0
  17. Router(config-if)#no shutdown
  18. Router(config-if)#exit
  19. Router(config)#interface fastEthernet 0/1
  20. Router(config-if)#ip address 61.159.62.129 255.255.255.248
  21. Router(config-if)#exit
  22. Router(config)#router rip
  23. Router(config-router)#version 2
  24. Router(config-router)#no auto-summary
  25. Router(config-router)#network 192.168.5.0

5）在路由器上配置默認路由並發布到RIP協議里並在三成交換機SM1上查看路由表

  1. Router(config)#ip route 0.0.0.0 0.0.0.0 f0/1
  2. Router(config)#router rip
  3. Router(config-router)#default-information originate

SM路由表如下所示：

  1. SM1# show ip route
  2. Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
  3. D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
  4. N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
  5. E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
  6. i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
  7. * - candidate default, U - per-user static route, o - ODR
  8. P - periodic downloaded static route
  9. Gateway of last resort is 192.168.5.2 to network 0.0.0.0
  10. C 192.168.1.0/24 is directly connected, Vlan1
  11. C 192.168.2.0/24 is directly connected, Vlan2
  12. C 192.168.3.0/24 is directly connected, Vlan3
  13. C 192.168.4.0/24 is directly connected, Vlan4
  14. C 192.168.5.0/24 is directly connected, FastEthernet0/5
  15. R* 0.0.0.0/0 [120/1] via 192.168.5.2, 00:00:18, FastEthernet0/5

6）在路由器上配置PAT

  1. Router(config)#access-list 1 permit 192.168.4.0 0.0.0.255
  2. Router(config)#ip nat inside source list 1 interface f0/1
  3. Router(config)#interface fastEthernet 0/0
  4. Router(config-if)#ip nat inside
  5. Router(config-if)#exit
  6. Router(config)#interface fastEthernet 0/1
  7. Router(config-if)#ip nat outside

7）用192.168.4.0和192.168.1.0測試網絡連通性

PC1

  1. PC>ping 61.159.62.130
  2. Pinging 61.159.62.130 with 32 bytes of data:
  3. Request timed out.
  4. Request timed out.
  5. Request timed out.
  6. Request timed out.
  7. Ping statistics for 61.159.62.130:
  8. Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

PC4

  1. PC>ping 61.159.62.130
  3. Pinging 61.159.62.130 with 32 bytes of data:
  5. Reply from 61.159.62.130: bytes=32 time=0ms TTL=126
  6. Reply from 61.159.62.130: bytes=32 time=0ms TTL=126
  7. Reply from 61.159.62.130: bytes=32 time=0ms TTL=126
  8. Reply from 61.159.62.130: bytes=32 time=0ms TTL=126
  10. Ping statistics for 61.159.62.130:
  11. Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
  12. Approximate round trip times in milli-seconds:
  13. Minimum = 0ms, Maximum = 0ms, Average = 0ms


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