{"id":2537,"date":"2021-10-14T16:04:24","date_gmt":"2021-10-14T23:04:24","guid":{"rendered":"https:\/\/www.xh86.me\/?p=2537"},"modified":"2021-10-14T16:04:24","modified_gmt":"2021-10-14T23:04:24","slug":"%e6%80%9d%e7%a7%91%e8%ae%be%e5%a4%87acl%e4%b8%8enat%e6%8a%80%e6%9c%af","status":"publish","type":"post","link":"https:\/\/www.xh86.me\/?p=2537","title":{"rendered":"\u601d\u79d1\u8bbe\u5907ACL\u4e0eNAT\u6280\u672f"},"content":{"rendered":"

\u601d\u79d1ACL\u8bbf\u95ee\u63a7\u5236<\/h2>\n

\u8def\u7531\u5668\u63a5\u53e3\u7684\u8bbf\u95ee\u63a7\u5236\u53d6\u51b3\u4e8e\u5e94\u7528\u5728\u5176\u4e0a\u7684ACL,\u6570\u636e\u5728\u8fdb\u51fa\u7f51\u7edc\u524d,\u8def\u7531\u5668\u4f1a\u6839\u636eACL\u5bf9\u5176\u8fdb\u884c\u5339\u914d,\u5339\u914d\u6210\u529f\u5c06\u5bf9\u6570\u636e\u8fdb\u884c\u8fc7\u6ee4\u6216\u8005\u662f\u8f6c\u53d1,\u5339\u914d\u5931\u8d25\u5219\u4e22\u5f03\u6570\u636e\u5305,\u76ee\u524d\u4e3b\u8981\u6709\u4e09\u79cdACL\u63a7\u5236,\u6807\u51c6ACL,\u6269\u5c55ACL,\u547d\u540dACL,\u6211\u4eec\u53ea\u4ecb\u7ecd\u524d\u4e24\u79cd.<\/p>\n

\u5728\u8def\u7531\u5668\u4e0a\u5e94\u7528ACL\u65f6,\u53ef\u4ee5\u4e3a\u6bcf\u79cd\u534f\u8bae,\u6bcf\u4e2a\u7aef\u53e3,\u6bcf\u4e2a\u65b9\u5411,\u548c\u6bcf\u4e2a\u63a5\u53e3,\u914d\u7f6e\u4e00\u4e2aACL,\u4e00\u822c\u79f0\u4e3a3p\u539f\u5219.<\/p>\n

\"Diagram\n\nDescription<\/p>\n

\u25c6\u6807\u51c6ACL\u914d\u7f6e\u25c6<\/h3>\n

\u6807\u51c6ALCL\u53ea\u80fd\u901a\u8fc7\u6e90\u5730\u5740\u8fdb\u884c\u8bbf\u95ee\u8fc7\u6ee4\u4e0e\u63a7\u5236,\u56e0\u6b64\u53ea\u80fd\u963b\u6b62\/\u5141\u8bb8\u6765\u81ea\u6307\u5b9aIP\u5730\u5740\u7684\u8bbf\u95ee\u8bf7\u6c42.<\/p>\n

\u914d\u7f6e\u4ea4\u6362\u673a:<\/strong>\u00a0\u9996\u5148\u914d\u7f6e\u4ea4\u6362\u673a,\u8fd9\u91cc\u5f00\u542f3\u4e2a\u7aef\u53e3Fa0\/1-3,\u5e76\u914d\u7f6e\u7aef\u53e3\u901f\u7387100.<\/p>\n

Switch0> enable<\/p>\n

Switch0># configure terminal<\/p>\n

Switch0(config)# interface range fa0\/1-3<\/p>\n

Switch0(config-if-range)# speed 100<\/p>\n

Switch0(config-if-range)# no shutdown<\/p>\n

Switch0(config-if-range)# exit<\/p>\n

\u914d\u7f6e\u8def\u7531\u5668:<\/strong>\u00a0\u63a5\u7740\u914d\u7f6e\u8def\u7531\u5668,\u5f00\u542f\u8def\u7531\u5668\u7684Fa0\/0\u548cFa0\/1\u7aef\u53e3,\u5e76\u914d\u7f6e\u4e0a\u7f51\u5173\u5730\u5740.<\/p>\n

Router0> enable<\/p>\n

Router0# configure terminal<\/p>\n

Router0(config)# interface GigabitEthernet 0\/0<\/p>\n

Router0(config-if)# ip address 192.168.1.254 255.255.255.0<\/p>\n

Router0(config-if)# no shutdown<\/p>\n

Router0(config-if)# exit<\/p>\n

Router0(config)# interface GigabitEthernet 0\/1<\/p>\n

Router0(config-if)# ip address 192.168.2.254 255.255.255.0<\/p>\n

Router0(config-if)# no shutdown<\/p>\n

Router0(config-if)# exit<\/p>\n

\u914d\u7f6e\u6807\u51c6ACL:<\/strong>\u00a0\u5728\u8def\u7531\u5668\u4e0a\u914d\u7f6e\u4e00\u6761\u6807\u51c6\u7684ACL\u89c4\u5219,\u7981\u6b62PC0\u8bbf\u95eeServer0\u670d\u52a1\u5668.<\/p>\n

Router0> enable<\/p>\n

Router0# configure terminal<\/p>\n

Router0(config)# access-list 1 deny 192.168.1.1 0.0.0.0 \/\/ \u62d2\u7edd192.168.1.1\u8bbf\u95eeServer0<\/p>\n

Router0(config)# access-list 1 permit any \/\/ \u8bbe\u7f6e\u9ed8\u8ba4\u5141\u8bb8\u6240\u6709,\u515c\u5e95\u64cd\u4f5c<\/p>\n

Router0(config)#<\/p>\n

Router0(config)# interface GigabitEthernet 0\/0 \/\/ \u9009\u62e9\u63a5\u53e3Gig0\/0<\/p>\n

Router0(config-if)# ip access-group 1 in \/\/ \u5c06\u4ee5\u4e0a\u914d\u7f6e\u6761\u76ee\u5e94\u7528\u5230\u5f53\u524d\u63a5\u53e3\u4e0a<\/p>\n

#Router0(config-if)# ip access-group 1 out \/\/ \u63a7\u5236\u51fa\u53e3\u6d41\u91cf(\u53ef\u7701\u7565)<\/p>\n

\u6d4b\u8bd5\u8fc7\u6ee4\u6548\u679c:<\/strong>\u00a0\u914d\u7f6e\u5b8c\u89c4\u5219\u4ee5\u540e,\u6211\u4eec\u6d4b\u8bd5\u4e00\u4e0b\u6548\u679c,\u4f7f\u7528PC0\u65e0\u6cd5\u8bbf\u95eeserver\u670d\u52a1\u5668\u800c\u662f\u7528PC1\u5219\u53ef\u4ee5\u8bbf\u95ee.<\/p>\n

PC0> ping 192.168.2.1<\/p>\n

Pinging 192.168.2.1 with 32 bytes of data:<\/p>\n

Reply from 192.168.1.254: Destination host unreachable.<\/p>\n

PC1> ping 192.168.2.1<\/p>\n

Pinging 192.168.2.1 with 32 bytes of data:<\/p>\n

Reply from 192.168.2.1: bytes=32 time=0ms TTL=127<\/p>\n

\u8fd9\u91cc\u9700\u8981\u6ce8\u610f\u4e00\u70b9,\u5982\u679c\u4f60\u6709\u4e24\u4e2a\u8def\u7531\u5668\u76f8\u8fde,\u90a3\u4e48ACL\u89c4\u5219\u5e94\u8be5\u8bbe\u7f6e\u5728\u8ddd\u79bb\u9650\u5236\u7684\u76ee\u6807\u8f83\u8fd1\u7684\u8def\u7531\u5668\u4e0a,\u5426\u5219\u53ef\u80fd\u4f1a\u51fa\u73b0\u6709\u6548\u6570\u636e\u5728\u5230\u8fbe\u76ee\u6807\u4e4b\u524d\u5c31\u88ab\u8fc7\u6ee4\u6389\u4e86.<\/p>\n

\u25c6\u62d3\u5c55ACL\u914d\u7f6e\u25c6<\/h3>\n

\u6807\u51c6ACL\u53ea\u80fd\u4f7f\u7528\u6e90\u5730\u5740\u4f5c\u4e3a\u5339\u914d\u6761\u4ef6,\u65e0\u6cd5\u5bf9\u8bbf\u95ee\u8fdb\u884c\u7cbe\u786e\u7684\u63a7\u5236,\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e00\u95ee\u9898,\u53ef\u4ee5\u91c7\u7528\u6269\u5c55ACL\u6765\u5bf9\u6570\u636e\u52a0\u4ee5\u9650\u5236.<\/p>\n

\u914d\u7f6e\u4ea4\u6362\u673a:<\/strong>\u00a0\u9996\u5148\u914d\u7f6e\u4ea4\u6362\u673a,\u8fd9\u91cc\u5f00\u542f4\u4e2a\u7aef\u53e3Fa0\/1-4,\u5e76\u914d\u7f6e\u7aef\u53e3\u901f\u7387\u4e3a100.<\/p>\n

Switch0> enable<\/p>\n

Switch0># configure terminal<\/p>\n

Switch0(config)# interface range fa0\/1-4<\/p>\n

Switch0(config-if-range)# speed 100<\/p>\n

Switch0(config-if-range)# no shutdown<\/p>\n

Switch0(config-if-range)# exit<\/p>\n

\u914d\u7f6e\u8def\u7531\u5668:<\/strong>\u00a0\u63a5\u7740\u914d\u7f6e\u8def\u7531\u5668,\u5f00\u542f\u8def\u7531\u5668\u7684Fa0\/0\u548cFa0\/1\u7aef\u53e3,\u5e76\u914d\u7f6e\u4e0a\u7f51\u5173\u5730\u5740.<\/p>\n

Router0> enable<\/p>\n

Router0# configure terminal<\/p>\n

Router0(config)# interface GigabitEthernet 0\/0<\/p>\n

Router0(config-if)# ip address 192.168.1.254 255.255.255.0<\/p>\n

Router0(config-if)# no shutdown<\/p>\n

Router0(config-if)# exit<\/p>\n

Router0(config)# interface GigabitEthernet 0\/0<\/p>\n

Router0(config-if)# ip address 192.168.2.254 255.255.255.0<\/p>\n

Router0(config-if)# no shutdown<\/p>\n

Router0(config-if)# exit<\/p>\n

\u914d\u7f6e\u62d3\u5c55ACL:<\/strong>\u00a0\u914d\u7f6e\u62d3\u5c55ACL\u89c4\u5219,\u7981\u6b62PC0\u8bbf\u95ee192.168.2.1,\u7981\u6b62PC1\u8bbf\u95ee192.168.2.1\u4e3b\u673a\u768480\u7aef\u53e3,\u5141\u8bb8\u5176\u4ed6\u6240\u6709.<\/p>\n

Router0> enable<\/p>\n

Router0# configure terminal<\/p>\n

Router0(config)# access-list 100 deny ip host 192.168.1.1 host 192.168.2.1 \/\/ \u62d2\u7eddIP\u5730\u5740<\/p>\n

Router0(config)# access-list 100 deny TCP host 192.168.1.2 eq 80 host 192.168.2.1 eq 80 \/\/ \u62d2\u7eddTCP=80<\/p>\n

Router0(config)# access-list 100 permit ip any any \/\/ \u9ed8\u8ba4\u5141\u8bb8<\/p>\n

Router0(config)# interface GigabitEthernet 0\/0 \/\/ \u9009\u62e9\u63a5\u53e3GigabitEthernet 0\/0<\/p>\n

Router0(config-if)# ip access-group 100 in \/\/ \u5c06\u4ee5\u4e0a\u914d\u7f6e\u6761\u76ee\u5e94\u7528\u5230\u5f53\u524d\u63a5\u53e3\u4e0a<\/p>\n

Router0(config-if)# ip access-group 100 out \/\/ \u5c06\u4ee5\u4e0a\u914d\u7f6e\u6761\u76ee\u5e94\u7528\u5230\u5f53\u524d\u63a5\u53e3\u4e0a<\/p>\n

Router0# show access-list \/\/ \u67e5\u8be2\u914d\u7f6e\u7ed3\u679c<\/p>\n

\u6d4b\u8bd5\u8fc7\u6ee4\u6548\u679c:<\/strong>\u00a0\u914d\u7f6e\u5b8c\u89c4\u5219\u540e\u6d4b\u8bd5\u4e0b,\u7ecf\u6d4b\u8bd5PC0\u65e0\u6cd5\u8bbf\u95eeServer0,\u800cPC1\u65e0\u6cd5\u8bbf\u95ee\u76ee\u6807\u4e3b\u673a\u768480\u7aef\u53e3\u5176\u4ed6\u4e3b\u673a\u653e\u884c.<\/p>\n

PC0> ping 192.168.2.1<\/p>\n

Pinging 192.168.2.1 with 32 bytes of data:<\/p>\n

Reply from 192.168.1.254: Destination host unreachable.<\/p>\n

PC1> ping 192.168.2.1<\/p>\n

Pinging 192.168.2.1 with 32 bytes of data:<\/p>\n

Reply from 192.168.2.1: bytes=32 time=0ms TTL=127<\/p>\n

\u4e0e\u6807\u51c6ACL\u76f8\u6bd4,\u6269\u5c55ACL\u80fd\u591f\u66f4\u52a0\u7cbe\u786e\u7684\u5339\u914d\u548c\u8fc7\u6ee4\u6570\u636e\u5305,\u56e0\u6b64\u6269\u5c55ACL\u7684\u653e\u7f6e\u4f4d\u7f6e\u5e94\u8be5\u79bb\u6e90\u5730\u5740\u8d8a\u8fd1\u8d8a\u597d,\u8fd9\u6837\u624d\u80fd\u591f\u6709\u6548\u7684\u63d0\u9ad8\u94fe\u8def\u7684\u4f7f\u7528\u6548\u7387.<\/p>\n

\u601d\u79d1NAT\u5730\u5740\u8f6c\u6362<\/h2>\n

NAT \u7f51\u7edc\u5730\u5740\u8f6c\u6362(Network Address Translation),\u662f\u4e00\u4e2a\u4e92\u8054\u7f51\u5de5\u7a0b\u4efb\u52a1\u7ec4\u7684\u6807\u51c6,\u5b83\u53ef\u4ee5\u5b9e\u73b0\u5185\u90e8\u79c1\u6709IP\u5730\u5740\u548c\u516c\u7f51IP\u5730\u5740\u7684\u8f6c\u6362,\u80fd\u591f\u8d77\u5230\u8282\u7ea6\u516c\u7f51IP\u5730\u5740\u7684\u4f5c\u7528,\u4ee5\u4e0b\u5c06\u4ecb\u7ecdNAT\u7684\u4e09\u79cd\u65b9\u5f0f,\u9759\u6001\u8f6c\u6362\u3001\u52a8\u6001\u8f6c\u6362\u548c\u7aef\u53e3\u590d\u7528\u6280\u672f.<\/p>\n

NAT\u6280\u672f\u4e2d\u6709\u56db\u79cd\u5730\u5740\u5373,\u5185\u90e8\u672c\u5730\u5730\u5740,\u5185\u90e8\u5168\u5c40\u5730\u5740,\u5916\u90e8\u672c\u5730\u5730\u5740,\u5916\u90e8\u5168\u5c40\u5730\u5740.<\/p>\n

\u25c6\u914d\u7f6e\u9759\u6001NAT\u25c6<\/h3>\n

\u9759\u6001NAT\u662f\u6307\u5c06\u5185\u90e8\u672c\u5730\u5730\u5740\u4e0e\u5185\u90e8\u5168\u5c40\u5730\u5740\u8fdb\u884c\u5bf9\u5e94\u8f6c\u6362,\u67d0\u4e2a\u672c\u5730\u5730\u5740\u53ea\u80fd\u8f6c\u6362\u4e3a\u67d0\u4e2a\u5168\u5c40\u5730\u5740,\u901a\u8fc7\u914d\u7f6e\u9759\u6001NAT\u53ef\u4ee5\u5b9e\u73b0\u5185\u90e8\u7f51\u7edc\u5bf9\u5916\u90e8\u7f51\u7edc\u7684\u8bbf\u95ee,\u4e5f\u53ef\u4ee5\u5b9e\u73b0\u5916\u90e8\u7f51\u7edc\u5bf9\u5185\u90e8\u7f51\u7edc\u4e2d\u67d0\u4e2a\u8bbe\u5907\u7684\u8bbf\u95ee.<\/p>\n

\"Chart,<\/p>\n

\u914d\u7f6e\u4ea4\u6362\u673a:<\/strong>\u00a0\u9996\u5148\u914d\u7f6e\u4ea4\u6362\u673a,\u8fd9\u91cc\u5f00\u542f4\u4e2a\u7aef\u53e3Fa0\/1-4,\u5e76\u914d\u7f6e\u7aef\u53e3\u901f\u7387\u4e3a100.<\/p>\n

Switch0> enable<\/p>\n

Switch0># configure terminal<\/p>\n

Switch0(config)# interface range fa0\/1-4<\/p>\n

Switch0(config-if-range)# speed 100<\/p>\n

Switch0(config-if-range)# no shutdown<\/p>\n

Switch0(config-if-range)# exit<\/p>\n

\u914d\u7f6e\u8def\u7531\u5668:<\/strong>\u00a0\u63a5\u7740\u914d\u7f6e\u8def\u7531\u5668,\u5f00\u542f\u8def\u7531\u5668\u7684Fa0\/0\u548cSe0\/0\/0\u7aef\u53e3,\u5e76\u914d\u7f6e\u4e0a\u7f51\u5173\u5730\u5740.<\/p>\n

Router> enable<\/p>\n

Router# configure terminal<\/p>\n

#—-\u5728Router10\u4e0a\u64cd\u4f5c————————-<\/p>\n

Router0(config)# interface fa0\/0<\/p>\n

Router0(config-if)# ip address 192.168.1.1 255.255.255.0<\/p>\n

Router0(config-if)# no shutdown<\/p>\n

Router0(config-if)# exit<\/p>\n

Router0(config)# interface se0\/0\/0<\/p>\n

Router0(config-if)# ip address 10.10.10.1 255.0.0.0<\/p>\n

Router0(config-if)# no shutdown<\/p>\n

Router0(config-if)# exit<\/p>\n

#—-\u5728Router1\u4e0a\u64cd\u4f5c————————-<\/p>\n

Router1(config)# interface se0\/0\/0<\/p>\n

Router1(config-if)# ip address 10.10.10.2 255.0.0.0<\/p>\n

Router1(config-if)# no shutdown<\/p>\n

Router1(config-if)# exit<\/p>\n

\u914d\u7f6e\u9759\u6001NAT:<\/strong>\u00a0\u5728\u8def\u7531\u5668Router0\u4e0a\u914d\u7f6e\u9759\u6001NAT,\u5c06\u79c1\u6709\u5730\u5740\u8f6c\u4e3a\u5168\u5c40\u5730\u5740(\u5185\u7f51\u5730\u5740–>\u5916\u7f51\u5730\u5740).<\/p>\n

Router> enable<\/p>\n

Router# configure terminal<\/p>\n

Router0(config)# ip nat inside source static 192.168.1.2 10.10.10.20 \/\/ \u914d\u7f6eNAT\u6761\u76ee1<\/p>\n

Router0(config)# ip nat inside source static 192.168.1.3 10.10.10.30 \/\/ \u914d\u7f6eNAT\u6761\u76ee2<\/p>\n

Router0(config)# ip nat inside source static 192.168.1.4 10.10.10.40 \/\/ \u914d\u7f6eNAT\u6761\u76ee3<\/p>\n

Router0(config)# interface fa0\/0 \/\/ \u9009\u62e9\u5185\u90e8\u7aef\u53e3<\/p>\n

Router0(config-if)# ip nat inside \/\/ \u5e94\u7528\u5230\u5b9a\u4e49\u7684\u5185\u90e8\u63a5\u53e3<\/p>\n

Router0(config-if)#<\/p>\n

Router0(config-if)# interface serial0\/0\/0 \/\/ \u9009\u62e9\u5916\u90e8\u63a5\u53e3<\/p>\n

Router0(config-if)# ip nat outside \/\/ \u5e94\u7528\u5230\u5b9a\u4e49\u7684\u5916\u90e8\u63a5\u53e3<\/p>\n

Router0(config-if)# exit<\/p>\n

\u67e5\u8be2NAT\u914d\u7f6e:<\/strong>\u00a0\u914d\u7f6e\u5b8c\u6210\u540e,\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528show ip nat translation\u547d\u4ee4,\u6765\u67e5\u8be2\u7aef\u53e3\u60c5\u51b5.<\/p>\n

Router0# show ip nat translation<\/p>\n

Pro Inside global Inside local Outside local Outside global<\/p>\n

— 10.10.10.20 192.168.1.2 — —<\/p>\n

— 10.10.10.30 192.168.1.3 — —<\/p>\n

— 10.10.10.40 192.168.1.4 — —<\/p>\n

\u6d4b\u8bd5\u901a\u4fe1\u60c5\u51b5:<\/strong>\u00a0\u6b64\u65f6\u6d4b\u8bd5\u4e0b\u901a\u4fe1\u60c5\u51b5,\u5728PC0-PC2\u4e3b\u673a\u53efPing\u901aRouter1,\u540c\u6837Router1\u53efPing\u901aPC0-PC2.<\/p>\n

PC0> ping 10.10.10.2<\/p>\n

Pinging 10.10.10.2 with 32 bytes of data:<\/p>\n

Reply from 10.10.10.2: bytes=32 time=1ms TTL=254<\/p>\n

Router1# ping 10.10.10.20<\/p>\n

Type escape sequence to abort.<\/p>\n

Sending 5, 100-byte ICMP Echos to 10.10.10.20, timeout is 2 seconds:<\/p>\n

!!!!!<\/p>\n

Success rate is 100 percent (5\/5), round-trip min\/avg\/max = 1\/5\/9 ms<\/p>\n

\u25c6\u914d\u7f6e\u52a8\u6001NAT\u25c6<\/h3>\n

\u52a8\u6001NAT\u662f\u6307\u5185\u90e8\u672c\u5730\u5730\u5740\u4e0e\u5185\u90e8\u5168\u5c40\u5730\u5740\u8fdb\u884c\u8f6c\u6362\u65f6,\u5185\u90e8\u5730\u5740\u53ef\u4ee5\u968f\u673a\u8f6c\u6362\u4e3a\u6307\u5b9a\u7684\u5916\u90e8\u5168\u5c40\u5730\u5740,\u6b64\u8fc7\u7a0b\u662f\u52a8\u6001\u5206\u914d\u7684\u4e0d\u9700\u8981\u8ba4\u4e3a\u5e72\u9884,\u4ece\u800c\u51cf\u5c11\u4e86\u914d\u7f6e\u7684\u5de5\u4f5c\u91cf.<\/p>\n

\u4f46\u9700\u8981\u6ce8\u610f\u7684\u662f,\u914d\u7f6e\u52a8\u6001NAT\u53ea\u80fd\u5b9e\u73b0\u5185\u90e8\u7f51\u7edc\u5bf9\u4e92\u8054\u7f51\u7684\u8bbf\u95ee,\u65e0\u6cd5\u5b9e\u73b0\u4e92\u8054\u7f51\u4e2d\u7684\u4e3b\u673a\u5bf9\u5185\u90e8\u7f51\u7edc\u4e2d\u7684\u4e3b\u673a\u7684\u8bbf\u95ee,\u4e5f\u5c31\u662f\u8bf4,\u5b83\u662f\u4e00\u79cd\u5355\u5411\u7684NAT\u6280\u672f.<\/p>\n

\u6e05\u9664NAT\u5217\u8868:<\/strong>\u00a0\u52a8\u6001NAT\u7684\u914d\u7f6e\u6211\u4eec\u540c\u6837\u9002\u7528\u4e0a\u9762\u7684\u62d3\u6251\u56fe,\u53ea\u662f\u5728NAT\u7684\u914d\u7f6e\u4e0a\u6709\u4e9b\u5c0f\u6539\u52a8.<\/p>\n

Router0# clear ip nat translation * \/\/ \u6e05\u9664\u52a8\u6001NAT\u8f6c\u6362\u5217\u8868<\/p>\n

Router0# show ip access-list \/\/ \u663e\u793aACL\u914d\u7f6e\u4fe1\u606f<\/p>\n

Router0# show ip nat statistics \/\/ \u67e5\u770bNAT\u8f6c\u6362\u7edf\u8ba1\u4fe1\u606f<\/p>\n

Router0# clear ip nat statistics \/\/ \u6e05\u9664NAT\u8f6c\u6362\u7edf\u8ba1\u4fe1\u606f<\/p>\n

\u914d\u7f6e\u4ea4\u6362\u673a:<\/strong>\u00a0\u9996\u5148\u914d\u7f6e\u4ea4\u6362\u673a,\u8fd9\u91cc\u5f00\u542f4\u4e2a\u7aef\u53e3Fa0\/1-4,\u5e76\u914d\u7f6e\u7aef\u53e3\u901f\u7387\u4e3a100.<\/p>\n

Switch0> enable<\/p>\n

Switch0># configure terminal<\/p>\n

Switch0(config)# interface range fa0\/1-4<\/p>\n

Switch0(config-if-range)# speed 100<\/p>\n

Switch0(config-if-range)# no shutdown<\/p>\n

Switch0(config-if-range)# exit<\/p>\n

\u914d\u7f6e\u8def\u7531\u5668:<\/strong>\u00a0\u63a5\u7740\u914d\u7f6e\u8def\u7531\u5668,\u5f00\u542f\u8def\u7531\u5668\u7684Fa0\/0\u548cSe0\/0\/0\u7aef\u53e3,\u5e76\u914d\u7f6e\u4e0a\u7f51\u5173\u5730\u5740.<\/p>\n

Router> enable<\/p>\n

Router# configure terminal<\/p>\n

#—-\u5728Router0\u4e0a\u64cd\u4f5c————————-<\/p>\n

Router0(config)# interface fa0\/0<\/p>\n

Router0(config-if)# ip address 192.168.1.1 255.255.255.0<\/p>\n

Router0(config-if)# no shutdown<\/p>\n

Router0(config-if)# exit<\/p>\n

Router0(config)# interface se0\/0\/0<\/p>\n

Router0(config-if)# ip address 10.10.10.1 255.0.0.0<\/p>\n

Router0(config-if)# no shutdown<\/p>\n

Router0(config-if)# exit<\/p>\n

#—-\u5728Router1\u4e0a\u64cd\u4f5c————————-<\/p>\n

Router1(config)# interface se0\/0\/0<\/p>\n

Router1(config-if)# ip address 10.10.10.2 255.0.0.0<\/p>\n

Router1(config-if)# no shutdown<\/p>\n

Router1(config-if)# exit<\/p>\n

\u914d\u7f6e\u52a8\u6001NAT:<\/strong>\u00a0\u8fd9\u91cc\u5206\u914d\u5916\u7f51IP\u8303\u56f4\u662f10.10.10.20-40,\u5185\u90e8\u5730\u5740\u8303\u56f4\u662f192.168.1.0\/24,\u5e76\u7ed1\u5b9a\u597d\u63a5\u53e3.<\/p>\n

Router0> enable<\/p>\n

Router0# configure terminal<\/p>\n

Router0(config)# ip nat pool NAT 10.10.10.20 10.10.10.40 netmask 255.0.0.0 \/\/\u5b9a\u4e49\u5185\u90e8\u5168\u5c40IP\u5730\u5740\u6c60<\/p>\n

Router0(config)# access-list 1 permit 192.168.1.0 0.0.0.255 \/\/ \u5b9a\u4e49\u53ef\u8f6c\u6362\u7684\u5185\u90e8\u672c\u5730IP\u5730\u5740<\/p>\n

Router0(config)# ip nat inside source list 1 pool NAT \/\/\u914d\u7f6e\u52a8\u6001NAT\u6620\u5c04,\u5c06NAT\u5730\u5740\u6c60\u4e0eACL\u5173\u8054<\/p>\n

Router0(config)# interface fa0\/0 \/\/ \u914d\u7f6e\u5185\u90e8\u7aef\u53e3<\/p>\n

Router0(config-if)# ip nat inside<\/p>\n

Router0(config-if)# interface serial0\/0\/0 \/\/ \u914d\u7f6e\u5916\u90e8\u7aef\u53e3<\/p>\n

Router0(config-if)# ip nat outside<\/p>\n

Router0(config-if)# no shutdown<\/p>\n

\u67e5\u8be2NAT\u914d\u7f6e:<\/strong>\u00a0\u914d\u7f6e\u5b8c\u6210\u540e,\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528show ip nat translation\u547d\u4ee4,\u6765\u67e5\u8be2\u7aef\u53e3\u60c5\u51b5.<\/p>\n

Router0# show ip nat translation<\/p>\n

Pro Inside global Inside local Outside local Outside global<\/p>\n

icmp 10.10.10.21:5 192.168.1.3:5 10.10.10.2:5 10.10.10.2:5<\/p>\n

icmp 10.10.10.21:6 192.168.1.3:6 10.10.10.2:6 10.10.10.2:6<\/p>\n

icmp 10.10.10.22:9 192.168.1.3:9 10.10.10.2:9 10.10.10.2:9<\/p>\n

icmp 10.10.10.23:10 192.168.1.2:10 10.10.10.2:10 10.10.10.2:10<\/p>\n

\u25c6\u591a\u8def\u590d\u7528PAT\u25c6<\/h3>\n

\u7aef\u53e3\u591a\u8def\u590d\u7528\u5373\u7aef\u53e3\u5730\u5740\u8f6c\u6362(PAT,Port Address Translation),\u662f\u6307\u5c06\u5185\u90e8\u672c\u5730IP\u5730\u5740\u52a8\u6001\u7684\u8f6c\u6362\u4e3a\u5355\u4e00\u7684\u5185\u90e8\u5168\u5c40IP\u5730\u5740\u548c\u7aef\u53e3\u53f7,\u5185\u90e8\u5168\u5c40IP\u5730\u5740\u53ea\u662f\u7528\u4e00\u4e2a,\u800c\u4e0d\u662f\u4e00\u7ec4\u5730\u5740\u6c60,\u4e5f\u5c31\u662f\u4e00\u4e2aIP\u5730\u5740\u7ed1\u5b9a\u591a\u4e2a\u7aef\u53e3,\u4ece\u800c\u66f4\u5927\u7684\u8282\u7ea6\u4e86IP\u5730\u5740\u7684\u8d44\u6e90\u77ed\u7f3a.<\/p>\n

\"Diagram\n\nDescription<\/p>\n

\u914d\u7f6e\u4ea4\u6362\u673a:<\/strong>\u00a0\u9996\u5148\u914d\u7f6e\u4ea4\u6362\u673a,\u8fd9\u91cc\u5f00\u542f4\u4e2a\u7aef\u53e3Fa0\/1-4,\u5e76\u914d\u7f6e\u7aef\u53e3\u901f\u7387\u4e3a100.<\/p>\n

Switch0> enable<\/p>\n

Switch0># configure terminal<\/p>\n

Switch0(config)# interface range fa0\/1-4<\/p>\n

Switch0(config-if-range)# speed 100<\/p>\n

Switch0(config-if-range)# no shutdown<\/p>\n

Switch0(config-if-range)# exit<\/p>\n

\u914d\u7f6e\u8def\u7531\u5668:<\/strong>\u00a0\u63a5\u7740\u914d\u7f6e\u8def\u7531\u5668,\u5f00\u542f\u8def\u7531\u5668\u7684Fa0\/0\u548cSe0\/0\/0\u7aef\u53e3,\u5e76\u914d\u7f6e\u4e0a\u7f51\u5173\u5730\u5740.<\/p>\n

Router> enable<\/p>\n

Router# configure terminal<\/p>\n

#—-\u5728Router0\u4e0a\u64cd\u4f5c————————-<\/p>\n

Router0(config)# interface fa0\/0<\/p>\n

Router0(config-if)# ip address 192.168.1.1 255.255.255.0<\/p>\n

Router0(config-if)# no shutdown<\/p>\n

Router0(config-if)# exit<\/p>\n

Router0(config)# interface se0\/0\/0<\/p>\n

Router0(config-if)# ip address 10.10.10.1 255.0.0.0<\/p>\n

Router0(config-if)# no shutdown<\/p>\n

Router0(config-if)# exit<\/p>\n

#—-\u5728Router1\u4e0a\u64cd\u4f5c————————-<\/p>\n

Router1(config)# interface se0\/0\/0<\/p>\n

Router1(config-if)# ip address 10.10.10.2 255.0.0.0<\/p>\n

Router1(config-if)# no shutdown<\/p>\n

Router1(config-if)# exit<\/p>\n

\u914d\u7f6e\u591a\u8def\u590d\u7528PAT:<\/strong>\u00a0\u5728\u8def\u7531\u5668Router0\u4e0a\u914d\u7f6ePAT,\u591a\u8def\u590d\u7528.<\/p>\n

Router> enable<\/p>\n

Router# configure terminal<\/p>\n

Router0(config)# ip nat pool PAT 10.10.10.10 10.10.10.10 netmask 255.0.0.0 \/\/ \u5b9a\u4e49\u5916\u7f51IP\u5730\u5740<\/p>\n

Router0(config)# access-list 1 permit 192.168.1.0 0.0.0.255 \/\/ \u5b9a\u4e49ACL<\/p>\n

Router0(config)# ip nat inside source list 1 pool PAT overload \/\/ \u5c06\u5730\u5740\u6c60\u4e0eACL\u7ed1\u5b9a<\/p>\n

Router0(config)# interface fa0\/0 \/\/ \u5b9a\u4e49\u8fde\u63a5\u5185\u90e8\u7f51\u7edc\u7684\u63a5\u53e3<\/p>\n

Router0(config-if)# ip nat inside<\/p>\n

Router0(config-if)# interface serial0\/0\/0 \/\/ \u5b9a\u4e49\u94fe\u63a5\u5916\u90e8\u7f51\u7edc\u7684\u63a5\u53e3<\/p>\n

Router0(config-if)# ip nat outside<\/p>\n

\u67e5\u8be2\u914d\u7f6e\u5730\u5740\u8868:<\/strong>\u00a0\u6700\u540e\u53ef\u4ee5\u68c0\u6d4b\u4e00\u4e0b\u662f\u5426\u80fd\u591f\u8fde\u63a5\u5230\u5185\u90e8\u4e0e\u5916\u90e8\u7684\u4e3b\u673a.<\/p>\n

Router#show ip nat translations<\/p>\n

Pro Inside global Inside local Outside local Outside global<\/p>\n

icmp 10.10.10.10:1024 192.168.1.4:1 10.10.10.2:1 10.10.10.2:1024<\/p>\n

icmp 10.10.10.10:1025 192.168.1.2:8 10.10.10.2:8 10.10.10.2:1025<\/p>\n

icmp 10.10.10.10:1027 192.168.1.3:1 10.10.10.2:1 10.10.10.2:1027<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

\u601d\u79d1ACL\u8bbf\u95ee\u63a7\u5236 \u8def\u7531\u5668\u63a5\u53e3\u7684\u8bbf\u95ee\u63a7\u5236\u53d6\u51b3\u4e8e\u5e94\u7528\u5728\u5176\u4e0a\u7684ACL,\u6570\u636e\u5728\u8fdb\u51fa\u7f51\u7edc\u524d,\u8def\u7531\u5668\u4f1a\u6839\u636eACL\u5bf9\u5176\u8fdb\u884c […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-2537","post","type-post","status-publish","format-standard","hentry","category-cisco"],"_links":{"self":[{"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts\/2537","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2537"}],"version-history":[{"count":1,"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts\/2537\/revisions"}],"predecessor-version":[{"id":2541,"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts\/2537\/revisions\/2541"}],"wp:attachment":[{"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2537"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2537"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2537"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}