網路位址轉換 (NAT)
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第 11 章. 網路位址轉換 (NAT). 何時使用 NAT ？. 必須連上網際網路 , 但是主機又沒有唯一的全域 IP 位址 更換到新的 ISP 而必須重新為網路編號 合併兩個具有重複位址的企業內網路. 在哪裡設定 NAT ？. NAT 的優缺點. NAT 的類型. 靜態 NAT 在區域與全域位址之間進行一對一的對應 動態 NAT 將未註冊的 IP 位址對應到一堆已註冊 IP 位址中的一個註冊 IP 位址。靜態與動態 NAT 都必須有足夠的真實 IP 位址 , 供每個想要與網際網路收送封包的機器使用 - PowerPoint PPT Presentation
Transcript of 網路位址轉換 (NAT)
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NAT, IP ISP
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NAT
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NAT
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NAT NAT NAT IP IP IP NAT IP , (overloading) , IP IP (Port Address Translation, PAT)
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NAT
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NAT
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PAT
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NATIP
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NAT access-list 1 IP todd IP NAT pooladdress poolNAT
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PATaddress
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NAT IP
debug ip nat NAT
clear ip nat translation NAT
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NATNAT ,
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NAT()ip nat translation max-entries , show ip nat statistics NAT , active (hit) (miss) pool (refcount)
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NAT ()clear ip nat translations NAT NAT NAT , Cisco IOS ip nat translation timeout NAT NAT , translation timeout, , NAT , Cisco 86, 400 (24 )
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NAT1 NAT, NAT
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NAT26 IP , 192.1.2.109 192.1.2.114 63 192.168.10.65 192.168.10.126 prefix-length 29 netmask ip nat pool Todd 192.1.2.109 192.1.2.114 netmask 255.255.255.248, 2 6 TCP ip nat inside ip nat outside
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NATCorp R3 PAT
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NAT
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NAT()
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NAT()
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Corp NAT Corp NAT Corp 64.1.1.5 / 30, R3
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NATsh ip nat trans HostC ping telnet HostD
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NAT debug ip nat Corp debug ip nat, HostB telnet HostD
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NAT show ip nat translation
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NAT show ip nat statistics
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SDM NAT (1) Configure-->NAT NAT , , NAT NAT DMZ, , NAT
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SDM NAT (2)Basic NAT, Launch the Selected Task
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SDM NAT (3) Next
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SDM NAT (4), Next
, Finish
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SDMNAT(1)
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SDMNAT(2)
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SDMNAT(3) ip nat inside source list
SDM
