11 - 1 NAT11 - 2 11 - 3 NAT 11 - 4 NAT 11 - 5 NAT11 - 6 NAT 11 - 7 SDM NAT 11 - 8
(NAT) (Network Address Translation, NAT) NAT (Port Address Translation, PAT, NAT , NAT overload) NAT, SDM , NAT NAT , 10
11 - 1 NATNAT (Classless Inter-Domain Routing, CIDR) , IP IP , IP , NAT , NAT , NAT
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NATNAT , 11.1
NATNAT , , NAT , , 11.1 NAT
NAT
11 - 2 3 NAT NAT NAT NAT IP NAT IP IP IP NAT , , NAT
IP , (overloading) NAT NAT, , IP IP () (Port Address Translation, PAT)
PAT (NAT ), IP , NAT IP ~
11 - 3 NAT NAT NAT (global address), , , (local) NAT , (inside local address)
NAT (outside local address) (), (inside global address), (outside global address) 11 - 2 , NAT
NAT
11 - 4 NAT NAT , 11.2 NAT () 11.2 , 10.1.1.1 NAT IP IP , , NAT
NAT
NAT , NAT NAT IP IP (PAT) 11.3 PAT
NAT
NAT , IP , 11.3 NAT IP IP , ,
NAT IP , NAT, PAT , IP 65000 ()
NAT NAT
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NAT ip nat inside source , ip nat outside source
NAT NAT IP , IP NAT
NAT
ip nat inside source list 1 pool todd access-list 1 IP todd IP NAT (pool),
NAT(interesting traffic), NAT , ip nat pool todd 170.168.2.2 192.168.2.254 , NAT
(PAT) NAT, NAT PAT
(PAT)
PAT NAT , IP , ip nat inside source overload
(PAT), IP IP IP NAT , ISP IP , , ( 170.168.2.2), , IP ,
NAT NAT () , IP ,
IP NAT ,
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11 - 5 NATCisco NAT , , ,
NAT, NAT NAT
NAT, , , NAT , , CPU, NAT 160
NAT (), , , ip nat translation max-entries show ip nat statistics NAT , (active)
NAT (hit) (miss) , pool (refcount)
NAT NAT NAT , , NAT , NAT , Cisco IOS
NATclear ip nat translations , TCP UDP () , (*) , , , () NAT ,
NAT, NAT NAT NAT , (translation timeout),
NAT, NAT , Cisco 86, 400 (24 ), ip nat translation timeout , NAT ,
NAT, 11.4, NAT, NAT
NAT 11.4 , NAT , NAT (PAT) NAT , NAT
pool , , PAT NAT
NAT NAT , 11.5 11.5 NAT , 6 IP , 192.1.2.109 192.1.2.114, , 63 192.168.10.65 192.168.10.126 NAT
NAT
NAT,
ip nat pool Todd 192.1.2.109 192.1.2.109 netmask 255.255.255.248 Todd, 192.1.2.109 NAT
NAT prefix-length 29 netmask (, , ~), 192.1.2.109 ip nat pool Todd 192.1.2.109 192.1.2.114 netmask 255.255.255.248, 2 6 TCP
NAT 2 access-list , 10 ip nat inside source list 1 pool Todd overload overload (PAT) ip nat inside ip nat outside
11 - 6 NAT 64.1.1.4 / 30 Corp R3 , 64.1.1.8 / 30 R3 F0 / 0 11.6 , 11.3
NAT
NAT 11.6 , Corp R3 PAT , Corp IP (, ISP , ), NAT , , , ISP IP
NAT , Corp NAT , ,
NAT
NAT
Corp 64.1.1.5 / 30, R3
NAT , Corp IP 64.1.1.5 PAT , , NAT
NAT
PAT , , HostC telnet HostD, ping, telnet
NAT Corp debug ip nat, HostB telnet HostD Corp
NAT
NAT
, ~ 1 HostB 2 , / HostB show ip nat translation
NAT Corp show ip nat statistics
NAT
2 , , SDM NAT
11 - 7 SDM NAT SDM NAT , Configure-->NAT, , NAT 10 , 10 , NAT , , NAT
SDM NAT NAT DMZ, , NAT 1 NAT
SDM NAT NAT, Launch the Selected Task, , NAT
SDM NAT , Next,
SDM NAT , NextNAT ,
SDM NAT , Finish
SDM NAT
SDM NAT
ip nat inside source list
, SDM
SDM NAT , , SDM ( ACLVPN NAT)
11 - 8 (NAT), (PAT) NAT NAT , , , NAT (PAT), SDM NAT
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