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NATµØÖ·³Ø×ª»» ͨ¹ý ¹«ÍøµØÖ·³ØµÄIPµØÖ·+¶Ë±êÓïÀ´¶ÔÓ¦ºÍÇø±ð¸÷¸öÊý¾ÝÁ÷½øÐÐÍøÂçµØÖ·×ª»» £¬ÒÔ´ïµ½¶àÄÚ²¿Ö÷»úͨ¹ýÉÙÁ¿¹«ÍøIPµØÖ·À´½Ó¼û±í²¿ÍøÂçµÄÖ÷ÕÅ ¡£ 

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Æóҵͨ¹ý×âÓÃÔËÓªÉ̵ÄרÏßÉÏÍø £¬µ±Óжà¸ö¹«ÍøIPµØÖ·µÄʱ³½ £¬Í¨¹ý°Ñ¶à¸ö¹«ÍøIPµØÖ··Åµ½¹«ÍøµØÖ·³Ø £¬°ÑÄÚÍøÓû§µÄµØÖ·×ª»»³É¹«ÍøµØÖ·³ØÀïÃæµÄIPµØÖ· £¬Ê¹ÄÚÍøÓû§¿ÉÄܽӼû±íÍø ¡£

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ÄÚÍøµØÖ·Í¨¹ýNAT £¬×ª»»³É¹«ÍøµØÖ·³ØµÄµØÖ· £¬Ê¹ÄÚÍø¿ÉÄÜÕý³£½Ó¼û±íÍø ¡£           

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3¡¢½ç˵natµÄÄÚÍø¿ÚºÍ±íÍø¿Ú

4¡¢ÔÚR1ÉÏÅäÖÃACL £¬°ÑÄÚÍø±ØÒª½øÐÐNATת»»µÄÁ÷Á¿Æ¥Åä³öÀ´

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Ruijie(config)#hostname R1

R1(config)#interface gigabitEthernet 0/0

R1(config-GigabitEthernet 0/0)#ip address 192.168.1.1 255.255.255.0

R1(config-GigabitEthernet 0/0)#exit

R1(config)#interface gigabitEthernet 0/1

R1(config-GigabitEthernet 0/1)#ip address 192.168.2.1 255.255.255.0

R1(config-GigabitEthernet 0/1)#exit

 

Ruijie(config)#hostname R2

R2(config)#interface gigabitEthernet 0/0

R2(config-GigabitEthernet 0/0)#ip address 192.168.1.2 255.255.255.0

R2(config-GigabitEthernet 0/0)#exit

R2(config)#interface gigabitEthernet 0/1

R2(config-GigabitEthernet 0/1)#ip address 172.16.1.1 255.255.255.0

R2(config-GigabitEthernet 0/1)#exit

R2(config)#interface gigabitEthernet 0/2

R2(config-GigabitEthernet 0/2)#ip address 172.16.2.1 255.255.255.0

R2(config-GigabitEthernet 0/2)#exit

 

Ruijie(config)#hostname R3

R3(config)#interface fastEthernet 0/0

R3(config-if-FastEthernet 0/0)#ip address 192.168.2.2 255.255.255.0

R3(config-if-FastEthernet 0/0)#exit

2¡¢¸ù»ùµÄip·ÓÉÅäÖÃ

R1(config)#ip route 172.16.0.0 255.255.0.0 192.168.1.2

R1(config)#ip route 100.1.1.0 255.255.255.0 192.168.2.2

R2(config)#ip route 100.1.1.0 255.255.255.0 192.168.1.1

3¡¢½ç˵natµÄÄÚÍø¿ÚºÍ±íÍø¿Ú

R1(config)#interface gigabitEthernet 0/1

R1(config-GigabitEthernet 0/1)#ip nat outside      //ÅäÖÃnatµÄ±íÍø¿Ú

R1(config-GigabitEthernet 0/1)#exit

R1(config)#int gigabitEthernet 0/0

R1(config-GigabitEthernet 0/0)#ip nat inside     //ÅäÖÃnatµÄÄÚÍø¿Ú

R1(config-GigabitEthernet 0/0)#exit

4¡¢ÔÚR1ÉÏÅäÖÃACL £¬°ÑÄÚÍø±ØÒª½øÐÐNATת»»µÄÁ÷Á¿Æ¥Åä³öÀ´

R1(config)#ip access-list standard 10

R1(config-std-nacl)#10 permit 172.16.1.0 0.0.0.255

R1(config-std-nacl)#20 permit 172.16.2.0 0.0.0.255

R1(config-std-nacl)#exit

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1£©¹«ÍøµØÖ·³ØµÄµØÖ· £¬²»Ô¸¶¨Òª¸ú±íÍø¿ÚµÄµØÖ·ÔÚͳһ¸öÍø¶Î £¬Ö»ÓÐÊDZíÍø·ÖÅäµÄ¿ÉÓÃipµØÖ·¾ÍÄܹ» ¡£

2£©¹«ÍøµØÖ·µÄÕØÊ¼ipµØÖ·ºÍʵÏÖipµØÖ·Äܹ»²»Â½Ðø

R1(config)#ip nat pool ruijie netmask 255.255.255.0         //ÅäÖÃÒ»¸öÃû×ÖΪruijieµÄ¹«ÍøµØÖ·³Ø

R1(config-ipnat-pool)#address 192.168.2.10 192.168.2.11    //¹«ÍøµØÖ·µÄÕØÊ¼ipµØÖ· £¬ÊµÏÖipµØÖ·

R1(config-ipnat-pool)#address 192.168.2.15 192.168.2.15    //ÈôÓжà¸ö¹«ÍøµØÖ· £¬µ«ÊDz»Â½Ðø £¬Äܹ»ÅäÖöà¸ö¹«ÍøµØÖ·¶Î

R1(config-ipnat-pool)#exit

6¡¢ÅäÖÃnatת»»Õ½Êõ

R1(config)#ip nat inside source list 10 pool ruijie overload      //½«acl 10Æ¥ÅäµÄÁ÷Á¿ £¬Ö´ÐÐnatת»» £¬×ª»»³ÉµØÖ·³ØruijieÀïÃæµÄµØÖ·

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overload²ÎÊýÊÇÖ´ÐÐnat³ÁÔØµÄÔ¢Òâ £¬Èô²»¼ÓoverloadÊÇÖ´Ðж¯Ì¬µÄipÒ»¶ÔÒ»Ó³Éä £¬²»»áÖ´Ðж˿Úת»» £¬²»Äܽâ¾ö¹«ÍøµØÖ·²»¹»µÄÎÊÌâ ¡£ÈôÊÇÔÚÍøÂç³ö¿ÚÖ´ÐÐNAT £¬ÊÇΪÏàʶ¾ö¹«ÍøµØÖ·²»¹»µÄÎÊÌâ £¬±Ø±ØÒª¼Óoverload²ÎÊý ¡£

 

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²âÊÔÄÚÍøÄÜ·ñÕý³£½Ó¼û±íÍø £¬ÈôÄÚÍøPCÄܹ»Õý³£½Ó¼û±íÍø £¬ÔòNATÅäÖÃÕýÈ· ¡£ÔÚ³ö¿Ú·ÓÉÆ÷Éϲ鿴NATת»»±íÏîÈçÏ£º

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